{"id":86,"date":"2012-05-26T10:47:47","date_gmt":"2012-05-26T17:47:47","guid":{"rendered":"https:\/\/www.gasdetection.com\/?page_id=86"},"modified":"2024-03-26T09:57:07","modified_gmt":"2024-03-26T16:57:07","slug":"interfering-gas-data","status":"publish","type":"page","link":"http:\/\/www.gasdetection.com\/the-tech-center\/instrument-sensor-performance\/interfering-gas-data\/","title":{"rendered":"Interfering Gas Data"},"content":{"rendered":"<p><!--image--> <img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-13420\" src=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/interference2.jpg\" alt=\"Interfering Gas Data\" width=\"300\" height=\"300\" srcset=\"http:\/\/www.gasdetection.com\/wp-content\/uploads\/interference2.jpg 300w, http:\/\/www.gasdetection.com\/wp-content\/uploads\/interference2-200x200.jpg 200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<style type=\"text\/css\" media=\"screen\">\n.printfriendly { display: none;}\n<\/style>\n<p>Please reach out for an updated list of data on interfering gas. The data on this web page is for our legacy products and we are actively working on updating it. Reach out <a href=\"https:\/\/www.gasdetection.com\/contact-interscan\/ask-us-anything-about-toxic-gas-detection\/\">here.<\/a><\/p>\n<p>No analytical method is completely specific. Gases present in the environment, other than the &#8220;target&#8221; gas of measurement, may affect instrument response. Interferences (aka &#8220;cross-sensitivities&#8221; are not necessarily linear, and may also exhibit time dependent characteristics.<\/p>\n<p>The charts that follow detail the <strong><em>approximate<\/em><\/strong> concentration in parts per million of interfering gas required to cause a 1 ppm deflection in the chosen analyzer. In many cases, specificity can be improved. Please note that the response values given are not absolute, and may vary depending on sensor formulation.<\/p>\n<p>The special case of how alcohols affect electrochemical sensors is discussed in this <a title=\"Alcohol and Electrochemical Sensors\" href=\"https:\/\/www.gasdetection.com\/knowledge-base\/ethylene-oxide-eto-or-eo-monitoring-applications\/alcohol-and-electrochemical-sensors\/\">Knowledge Base<\/a> article.<\/p>\n<p>For further information on the effects of interfering gases, please contact the <a href=\"mailto:&#x73;&#x65;&#x72;&#x76;&#x69;&#x63;&#x65;&#x40;&#x67;&#x61;&#x73;&#x64;&#x65;&#x74;&#x65;&#x63;&#x74;&#x69;&#x6f;&#x6e;&#x2e;&#x63;&#x6f;&#x6d;\">factory<\/a>.<\/p>\n<p><strong>Please note: this information applies to the legacy interscan devices, including the Interscan 4000 series, LD, and RM series gas detection instruments. For updated information on our current devices, please contact us by phone at 360-833-8835 or by email at <a href=\"mailto:&#x69;&#x6e;&#x66;&#x6f;&#x40;&#x67;&#x61;&#x73;&#x64;&#x65;&#x74;&#x65;&#x63;&#x74;&#x69;&#x6f;&#x6e;&#x2e;&#x63;&#x6f;&#x6d;\">&#x69;&#x6e;&#x66;&#x6f;&#x40;<span class=\"oe_displaynone\">null<\/span>&#x67;&#x61;&#x73;&#x64;&#x65;&#x74;&#x65;&#x63;&#x74;&#x69;&#x6f;&#x6e;&#x2e;&#x63;&#x6f;&#x6d;<\/a><\/strong>.<\/p>\n<p>The charts follow the format, and grouping of gases, that was originally established in early Interscan print brochures.<\/p>\n<p><em>Click on the links below to view each chart.<\/em><\/p>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_1631001699662a265de9415\">Chart 1: Br<sub>2<\/sub>, CO, Cl<sub>2<\/sub>, ClO<sub>2<\/sub>, H<sub>2<\/sub>, H<sub>2<\/sub>S, NO, NO<sub>2<\/sub>, O<sub>3<\/sub>, SO<sub>2<\/sub> analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"text-align: right;\"><span style=\"font-size: small;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/Interfering-Gas-Data-Charts-1.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/span><\/p>\n<table style=\"width: 630px; font-size: 8pt ! important;\" border=\"1\" align=\"center\">\n<tbody>\n<tr>\n<td colspan=\"19\" bgcolor=\"#00CC66\">\n<div><strong>INTERFERING GAS<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"12\" align=\"center\" valign=\"middle\" bgcolor=\"#00CC66\" width=\"10\">\n<div><strong>A N<\/strong><br \/>\n<strong> A<\/strong><br \/>\n<strong> L<\/strong><br \/>\n<strong> Y<\/strong><br \/>\n<strong> Z<\/strong><br \/>\n<strong> E<\/strong><br \/>\n<strong> R<\/strong><\/div>\n<\/td>\n<td align=\"center\" valign=\"top\" width=\"29\" height=\"29\"><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\"><strong>Br<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"48\" height=\"29\"><strong>C<sub>2<\/sub>H<sub>5<\/sub>SH<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>Cl<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>CO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>H<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>HCl<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>HCN<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"63\" height=\"29\"><strong>hydrazine<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>H<sub>2<\/sub>S<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>NH<sub>3<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>NO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"32\" height=\"29\"><strong>N<sub>2<\/sub>O<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>NO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"33\"><strong>O<sub>3<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"62\" height=\"29\">\n<div><strong>Saturated<\/strong><br \/>\n<strong> HC\u2021<\/strong><\/div>\n<\/td>\n<td align=\"center\" valign=\"top\" width=\"29\" height=\"29\"><strong>SO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"44\" height=\"29\"><strong>Unsat<\/strong><br \/>\n<strong> HC\u2021<\/strong><\/td>\n<\/tr>\n<tr>\n<td><strong>Br<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\">\u2014<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\">3.5<br \/>\n[N]<\/td>\n<td align=\"center\">1.3<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\">450<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\">6200<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\">4.5<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\">2<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\">0.7<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\">1.0<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\">17<br \/>\n[N]<\/td>\n<td align=\"center\">180<\/td>\n<td align=\"center\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\">1.3<\/td>\n<td align=\"center\">1.3<\/td>\n<td align=\"center\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\">1.3<br \/>\n[N]<\/td>\n<td align=\"center\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td align=\"left\" valign=\"bottom\" width=\"29\"><strong>CO<\/strong><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td align=\"center\" width=\"48\">&gt;10<sup>3<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">\u2014<\/td>\n<td align=\"center\" width=\"28\">8\u00a4<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"63\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"33\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"29\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"44\">17<\/td>\n<\/tr>\n<tr>\n<td width=\"29\"><strong>Cl<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" width=\"28\">0.65<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"48\">3<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">\u2014<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">400<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">6000<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">4<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">1.5<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"63\">0.5<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">0.3<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">14<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">150<\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">1<\/td>\n<td align=\"center\" width=\"33\">1<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"29\">1<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"44\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td width=\"29\"><strong>ClO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" width=\"28\">2.1<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"48\">9<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">2.8<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">1200<br \/>\n[N]<\/td>\n<td style=\"width: 28px; background-color: #33ffff;\" align=\"center\">&gt;10<sup>4<\/sup><br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">12\u00a4<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">4.5<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"63\">1.5<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">1.0<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">42<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">450<\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">3<\/td>\n<td align=\"center\" width=\"33\">3<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"29\">3<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"44\">&gt;1500<\/td>\n<\/tr>\n<tr>\n<td width=\"29\" height=\"27\"><strong>H<sub>2<\/sub><\/strong><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td align=\"center\" width=\"48\">&gt;10<sup>3<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">0.1<\/td>\n<td align=\"center\" width=\"28\">\u2014<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"63\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">&gt;10<sup>3<\/sup><br \/>\n[N]<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"29\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"44\">3<\/td>\n<\/tr>\n<tr>\n<td width=\"29\"><strong>H<sub>2<\/sub>S (1)<\/strong><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">9<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"48\">3<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">11<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">40<\/td>\n<td align=\"center\" width=\"28\">400<\/td>\n<td align=\"center\" width=\"28\">11<\/td>\n<td align=\"center\" width=\"28\">10\u00a4<\/td>\n<td align=\"center\" width=\"63\">4<\/td>\n<td align=\"center\" width=\"28\">\u2014<\/td>\n<td align=\"center\" width=\"28\">220<\/td>\n<td align=\"center\" width=\"28\">4<\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">65<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"33\">15<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"29\">4<\/td>\n<td align=\"center\" width=\"44\">15<\/td>\n<\/tr>\n<tr>\n<td width=\"29\"><strong>H<sub>2<\/sub>S (2)<\/strong><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">40<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"48\">1<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">50<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">8000<\/td>\n<td align=\"center\" width=\"28\">7000<\/td>\n<td align=\"center\" width=\"28\">15<\/td>\n<td align=\"center\" width=\"28\">15<\/td>\n<td align=\"center\" width=\"63\">6<\/td>\n<td align=\"center\" width=\"28\">\u2014<\/td>\n<td align=\"center\" width=\"28\">300<\/td>\n<td align=\"center\" width=\"28\">15<\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">60<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"33\">20<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"29\">6<\/td>\n<td align=\"center\" width=\"44\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td width=\"29\"><strong>NO<\/strong><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"48\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"63\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"28\">\u2014<\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"33\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"29\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" width=\"44\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td width=\"29\"><strong>NO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" width=\"28\">0.6<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"48\">3<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">0.7<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">350<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">6000<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">4\u00a4<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">2<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"63\">0.7<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">0.2<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">15<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">150<\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">\u2014<\/td>\n<td align=\"center\" width=\"33\">1<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"29\">1<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"44\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td><strong>O<sub>3<\/sub><\/strong><\/td>\n<td align=\"center\" width=\"28\">0.65<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"48\">3<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">1<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">400<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">6000<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">4<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">2<br \/>\n[N]<\/td>\n<td align=\"center\" bgcolor=\"#33FFFF\" width=\"63\">0.5<br \/>\n[N]<\/td>\n<td align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">0.3<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">\u00a015<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">150<\/td>\n<td align=\"center\" width=\"32\">\u00a0&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">\u00a01<\/td>\n<td align=\"center\" width=\"33\">\u2014<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"29\">1<br \/>\n[N]<\/td>\n<td align=\"center\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td width=\"29\"><strong>SO<sub>2<\/sub><\/strong><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">2.5<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"48\">1<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">3<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">700<\/td>\n<td align=\"center\" width=\"28\">5000<\/td>\n<td align=\"center\" width=\"28\">2<\/td>\n<td align=\"center\" width=\"28\">2<\/td>\n<td align=\"center\" width=\"63\">1<\/td>\n<td align=\"center\" width=\"28\">0.3<\/td>\n<td align=\"center\" width=\"28\">68<\/td>\n<td align=\"center\" width=\"28\">6\u00a4<\/td>\n<td align=\"center\" width=\"32\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"28\">24<br \/>\n[N]<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"33\">2<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"62\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"29\">\u2014<\/td>\n<td align=\"center\" width=\"44\">&gt;500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"padding-left: 30px;\"><span style=\"font-size: x-small;\">(1) Data shown for H<sub>2<\/sub>S models with ranges higher than 0-1999 ppb<\/span><br \/>\n<span style=\"font-size: x-small;\"> (2) Data shown for H<sub>2<\/sub>S models with ranges of 0-1999 ppb and lower<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"font-size: x-small;\"><span style=\"background-color: #33ffff;\">[N]<\/span> = Negative interference<\/span><br \/>\n<span style=\"font-size: x-small;\">\u2021 = Hydrocarbons<\/span><br \/>\n<span style=\"font-size: x-small;\">\u00a4 = Rejection ratio can be improved electronically<\/span><\/p>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_541864494662a265de948a\">Chart 2: Ethylene oxide (EtO) (C<sub>2<\/sub>H<sub>4<\/sub>O), Propylene oxide (PrO) (C<sub>3<\/sub>H<sub>6<\/sub>O) analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"text-align: right;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/eto_pro_interference_chart.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/p>\n<table style=\"width: 630px; font-size: 8pt ! important;\" border=\"1\">\n<tbody>\n<tr bgcolor=\"#00CC66\">\n<td colspan=\"10\">\n<div><strong>INTERFERING GAS<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" align=\"center\" valign=\"middle\" bgcolor=\"#00CC66\" width=\"145\"><strong> EtO\u00a0ANALYZER<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"86\" height=\"29\">Cl<sub>2<\/sub><\/td>\n<td align=\"center\" valign=\"top\" width=\"60\" height=\"29\">CO<\/td>\n<td align=\"center\" valign=\"top\" width=\"56\" height=\"29\">CO<sub>2<\/sub><\/td>\n<td align=\"center\" valign=\"top\" width=\"64\" height=\"29\">ethyl alcohol<\/td>\n<td align=\"center\" valign=\"top\" width=\"37\" height=\"29\">Freon<\/td>\n<td align=\"center\" valign=\"top\" width=\"96\" height=\"29\">glutaraldehyde<\/td>\n<td align=\"center\" valign=\"top\" width=\"62\" height=\"29\">isopropyl alcohol<\/td>\n<td align=\"center\" valign=\"top\" width=\"42\" height=\"29\">N<sub>2<\/sub>O<\/td>\n<td align=\"center\" valign=\"top\" width=\"49\" height=\"29\">NH<sub>3<\/sub><\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #33ffff;\" align=\"center\" valign=\"middle\" bgcolor=\"#33FFFF\" width=\"86\" height=\"51\">25<br \/>\n[N]<\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#FFFFFF\" width=\"60\" height=\"51\">6<\/td>\n<td align=\"center\" valign=\"middle\" width=\"56\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"64\" height=\"51\">380<\/td>\n<td align=\"center\" valign=\"middle\" width=\"37\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"96\" height=\"51\">5<\/td>\n<td align=\"center\" valign=\"middle\" width=\"62\" height=\"51\">1.1 \u00b6<\/td>\n<td align=\"center\" valign=\"middle\" width=\"42\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"49\" height=\"51\">300<\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#CC9900\" width=\"145\"><strong> PrO\u00a0ANALYZER<\/strong><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" valign=\"middle\" bgcolor=\"#33FFFF\" width=\"86\" height=\"51\">26<br \/>\n[N]<\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#FFFFFF\" width=\"60\" height=\"51\">5.5<\/td>\n<td align=\"center\" valign=\"middle\" width=\"56\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"64\" height=\"51\">400<\/td>\n<td align=\"center\" valign=\"middle\" width=\"37\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"96\" height=\"51\">6<\/td>\n<td align=\"center\" valign=\"middle\" width=\"62\" height=\"51\">1 \u00b6<\/td>\n<td align=\"center\" valign=\"middle\" width=\"42\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"49\" height=\"51\">320<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"padding-left: 30px;\"><span style=\"font-size: x-small;\">\u00b6 Isopropyl alcohol represents the most significant interference on the ethylene oxide sensor, but in nearly all cases, potential problems can be overcome. Typical remedial actions include:<br \/>\na. Point shutdown\/automatic restart, which allows the operator to temporarily interrupt monitoring at points that could be affected when isopropyl alcohol is used. Monitoring restarts automatically on a time-adjustable basis.<br \/>\nb. Selection of monitoring points away from those areas that may be unduly affected by isopropyl alcohol.<br \/>\nc. Using alternative germicides, which do not contain isopropyl alcohol.<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"font-size: x-small;\">The EtO sensor may also respond to strong odors of colognes and perfumes, and to certain floor strippers and waxes. Refer to guidelines above covering isopropyl alcohol. Remember that you are attempting to monitor parts per million levels of ethylene oxide in an environment that may contain percent (10,000 ppm = 1 percent) levels of these potentially interfering compounds.<\/span><\/p>\n<p style=\"padding-left: 30px;\"><span style=\"font-size: x-small;\"><span style=\"background-color: #33ffff;\">[N]<\/span> = Negative interference<\/span><\/p>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_2010227331662a265de94c9\">Chart 3: Formaldehyde (HCHO) analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"text-align: right;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/Interfering-Gas-Data-Charts-3.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/p>\n<table style=\"width: 630px; font-size: 8pt ! important;\" border=\"1\" align=\"center\">\n<tbody>\n<tr>\n<td colspan=\"11\" bgcolor=\"#009933\">\n<div><strong>INTERFERING GAS<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"5\" align=\"center\" valign=\"middle\" bgcolor=\"#FF6600\" width=\"86\"><strong> HCHO<\/strong><br \/>\n<strong> ANALYZER<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"87\" height=\"29\"><strong>CH<sub>3<\/sub>CHO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"60\" height=\"29\"><strong>acetone<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"53\" height=\"29\"><strong>Cl<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"65\" height=\"29\"><strong>CO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"74\" height=\"29\"><strong>ethanol<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"97\" height=\"29\"><strong>glutaraldehyde<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>H<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"33\" height=\"29\"><strong>H<sub>2<\/sub>S<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"44\" height=\"29\"><strong>HCl<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"64\" height=\"29\"><strong>SO<sub>2<\/sub><\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\">17<\/td>\n<td align=\"center\" valign=\"middle\" width=\"60\" height=\"14\">&gt;10<sup>3<\/sup><\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" valign=\"middle\" bgcolor=\"#33FFFF\" width=\"53\" height=\"14\">7<br \/>\n[N]<\/td>\n<td align=\"center\" valign=\"middle\" width=\"65\" height=\"14\">5600<\/td>\n<td align=\"center\" valign=\"middle\" width=\"74\" height=\"14\">127<\/td>\n<td align=\"center\" valign=\"middle\" width=\"97\" height=\"14\">200<\/td>\n<td align=\"center\" valign=\"middle\" width=\"28\" height=\"14\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"33\" height=\"14\">3 \u00a7<\/td>\n<td align=\"center\" valign=\"middle\" width=\"44\" height=\"14\">35<\/td>\n<td align=\"center\" valign=\"middle\" width=\"64\" height=\"14\">3 \u00a7<\/td>\n<\/tr>\n<tr>\n<td colspan=\"10\" bgcolor=\"#666666\" height=\"8\"><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"top\" width=\"87\" height=\"29\"><strong>isopropanol<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"60\" height=\"29\"><strong>CH<sub>3<\/sub>OH<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"53\" height=\"29\"><strong>methyl<\/strong><br \/>\n<strong> ethyl<\/strong><br \/>\n<strong>ketone<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"65\" height=\"29\"><strong>n-butanol<\/strong><\/td>\n<td align=\"center\" valign=\"top\" nowrap=\"nowrap\" width=\"74\" height=\"29\"><strong>n-propanol<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"97\" height=\"29\"><strong>NH<sub>3<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>NO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"33\" height=\"29\"><strong>NO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"44\" height=\"29\"><strong>phenol<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"64\" height=\"29\"><strong>propion-<\/strong><br \/>\n<strong> aldehyde<\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" width=\"87\" height=\"19\">1000<\/td>\n<td align=\"center\" valign=\"middle\" width=\"60\" height=\"19\">625<\/td>\n<td align=\"center\" valign=\"middle\" width=\"53\" height=\"19\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"65\" height=\"19\">3200<\/td>\n<td align=\"center\" valign=\"middle\" width=\"74\" height=\"19\">2000<\/td>\n<td align=\"center\" valign=\"middle\" width=\"97\" height=\"19\">300<\/td>\n<td align=\"center\" valign=\"middle\" width=\"28\" height=\"19\">500<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" valign=\"middle\" bgcolor=\"#33FFFF\" width=\"33\" height=\"19\">35<br \/>\n[N]<\/td>\n<td align=\"center\" valign=\"middle\" width=\"44\" height=\"19\">&gt;10<sup>3<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"64\" height=\"19\">160<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: x-small;\"><span style=\"background-color: #33ffff;\">[N]<\/span> = Negative interference<\/span><br \/>\n<span style=\"font-size: x-small;\">\u00a7 = Scrubber available<\/span><\/p>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_38415459662a265de9501\">Chart 4: HBr, HCl, HCN, hydrazine analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"text-align: right;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/Interfering-Gas-Data-Charts-4.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/p>\n<table style=\"width: 630px; font-size: 8pt ! important;\" border=\"1\" align=\"center\">\n<tbody>\n<tr>\n<td colspan=\"18\" bgcolor=\"#009933\">\n<div><strong>INTERFERING GAS<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"5\" align=\"center\" valign=\"middle\" bgcolor=\"#FF6600\" width=\"11\"><strong>A<\/strong><br \/>\n<strong> N<\/strong><br \/>\n<strong> A<\/strong><br \/>\n<strong> L<\/strong><br \/>\n<strong> Y<\/strong><br \/>\n<strong> Z<\/strong><br \/>\n<strong> E<\/strong><br \/>\n<strong> R<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"44\" height=\"29\"><\/td>\n<td align=\"center\" valign=\"top\" width=\"48\" height=\"29\"><strong>C<sub>2<\/sub>H<sub>5<\/sub>SH<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"23\" height=\"29\"><strong>Cl<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>CO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>H<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"26\" height=\"29\"><strong>H<sub>2<\/sub>S<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"25\" height=\"29\"><strong>HCl<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"27\" height=\"29\"><strong>HCN<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"63\" height=\"29\"><strong>hydrazine<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>N<sub>2<\/sub>O<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>NH<sub>3<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>NO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"26\" height=\"29\"><strong>NO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"26\" height=\"29\"><strong>SO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"28\" height=\"29\"><strong>SO<sub>3<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"72\" height=\"29\"><strong>Saturated<\/strong><br \/>\n<strong> HC<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"76\" height=\"29\"><strong>Unsat<\/strong><br \/>\n<strong> HC<\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" width=\"44\"><strong>HBr<\/strong><\/td>\n<td align=\"center\" width=\"48\">0.3<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"23\">20<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">1000<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"26\">0.2<\/td>\n<td align=\"center\" width=\"25\">0.7<\/td>\n<td align=\"center\" width=\"27\">0.7<\/td>\n<td align=\"center\" width=\"63\">6<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">25<\/td>\n<td align=\"center\" width=\"28\">1<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"26\">18<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"26\">0.7<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"72\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"76\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" width=\"44\"><strong>HCl<\/strong><\/td>\n<td align=\"center\" width=\"48\">0.2<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"23\">17<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"28\">1000<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"26\">0.1<\/td>\n<td align=\"center\" width=\"25\">\u2014<\/td>\n<td align=\"center\" width=\"27\">1<\/td>\n<td align=\"center\" width=\"63\">5<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">21<\/td>\n<td align=\"center\" width=\"28\">0.6<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"26\">15<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"26\">0.5<\/td>\n<td align=\"center\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"72\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"76\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" width=\"44\"><strong>HCN<\/strong><\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"48\">0.2<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"23\">20<br \/>\n[N]<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\">1000<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"26\">0.1<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"25\">1<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"27\">\u2014<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"63\">6<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\">21<\/td>\n<td align=\"center\" width=\"28\">1<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"26\">15<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"26\">0.5<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"72\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"76\">&gt;500<\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" nowrap=\"nowrap\" width=\"44\" height=\"46\"><strong>Hydra\u2013<\/strong><br \/>\n<strong> zine<\/strong><\/td>\n<td align=\"center\" width=\"48\" height=\"46\">10<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"23\" height=\"46\">5<br \/>\n[N]<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\" height=\"46\">1000<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\" height=\"46\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"26\" height=\"46\">0.1<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"25\" height=\"46\">45<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"27\" height=\"46\">8<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"63\" height=\"46\">\u2014<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\" height=\"46\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"28\" height=\"46\">1500<\/td>\n<td align=\"center\" width=\"28\" height=\"46\">1300<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" bgcolor=\"#33FFFF\" width=\"26\" height=\"46\">30<br \/>\n[N]<\/td>\n<td align=\"center\" width=\"26\" height=\"46\">3.5<\/td>\n<td align=\"center\" bgcolor=\"#FFFFFF\" width=\"28\" height=\"46\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"72\" height=\"46\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" width=\"76\" height=\"46\">&gt;500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: x-small;\"><span style=\"background-color: #33ffff;\">[N]<\/span> = Negative interference<\/span><\/p>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_1910389793662a265de9537\">Chart 5: C<sub>2<\/sub>H<sub>4<\/sub> (ethylene) analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"text-align: right;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/Interfering-Gas-Data-Charts-5.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/p>\n<table style=\"width: 630px; font-size: 8pt ! important;\" border=\"1\" align=\"center\">\n<tbody>\n<tr>\n<td colspan=\"15\" bgcolor=\"#009933\">\n<div><strong>INTERFERING GAS<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" align=\"center\" valign=\"middle\" bgcolor=\"#FF6600\"><strong> C<sub>2<\/sub>H<sub>4<\/sub>\u00a0(ethylene)<\/strong><br \/>\n<strong> ANALYZER<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>acetone<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>acetylene<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>Cl<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>CO<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>CO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>ethyl alcohol <\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>ethylene glycol<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>EtO<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>Freon<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>glutar-<\/strong><br \/>\n<strong> aldehyde<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>H<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>isopropyl alcohol<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>N<sub>2<\/sub>O<\/strong><\/td>\n<td align=\"center\" valign=\"top\"><strong>NH<sub>3<\/sub><\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#FFFFFF\">300<\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#FFFFFF\">4<\/td>\n<td style=\"background-color: #33ffff;\" align=\"center\" valign=\"middle\">15<br \/>\n[N]<\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#FFFFFF\">8<\/td>\n<td align=\"center\" valign=\"middle\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\">150<\/td>\n<td align=\"center\" valign=\"middle\">0.3<\/td>\n<td align=\"center\" valign=\"middle\">0.2<\/td>\n<td align=\"center\" valign=\"middle\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\">1<\/td>\n<td align=\"center\" valign=\"middle\">500<\/td>\n<td align=\"center\" valign=\"middle\">0.4<\/td>\n<td align=\"center\" valign=\"middle\">&gt;10<sup>5<\/sup><\/td>\n<td align=\"center\" valign=\"middle\">200<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: x-small;\"><span style=\"background-color: #33ffff;\">[N]<\/span> = Negative interference<\/span><\/p>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_1457520930662a265de9569\">Chart 6: H<sub>2<\/sub>O<sub>2<\/sub> (hydrogen peroxide) analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"text-align: right;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/Interfering-Gas-Data-Charts-6.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/p>\n<table style=\"width: 630px; font-size: 8pt ! important;\" border=\"1\">\n<tbody>\n<tr bgcolor=\"#00CC66\">\n<td colspan=\"13\">\n<div><strong>INTERFERING GAS<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" align=\"center\" valign=\"middle\" bgcolor=\"#FF6600\" width=\"96\"><strong> H<sub>2<\/sub>O<sub>2<\/sub>\u00a0<\/strong><br \/>\n<strong>ANALYZER<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"42\"><strong>H<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"29\" height=\"29\"><strong>Cl<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"53\" height=\"29\"><strong>CO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"46\" height=\"29\"><strong>CO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"72\" height=\"29\"><strong>ethyl alcohol <\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"40\" height=\"29\"><strong>EtO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"54\"><strong>H<sub>2<\/sub>S<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"60\"><strong>SO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"78\" height=\"29\"><strong>glutar-<\/strong><br \/>\n<strong>aldehyde<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"69\" height=\"29\"><strong>isopropyl alcohol<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"64\" height=\"29\"><strong>N<sub>2<\/sub>O<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"40\" height=\"29\"><strong>NH<sub>3<\/sub><\/strong><\/td>\n<\/tr>\n<tr>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#FFFFFF\" width=\"42\">&gt;8000<\/td>\n<td style=\"width: 29px; height: 51px; background-color: #33ffff;\" align=\"center\" valign=\"middle\">6<br \/>\n[N]<\/td>\n<td align=\"center\" valign=\"middle\" bgcolor=\"#FFFFFF\" width=\"53\" height=\"51\">&gt;1000<\/td>\n<td align=\"center\" valign=\"middle\" width=\"46\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"72\" height=\"51\">&gt;500<\/td>\n<td align=\"center\" valign=\"middle\" width=\"40\" height=\"51\">&gt;500<\/td>\n<td align=\"center\" valign=\"middle\" width=\"54\">0.6<\/td>\n<td align=\"center\" valign=\"middle\" width=\"60\">2<\/td>\n<td align=\"center\" valign=\"middle\" width=\"78\" height=\"51\">&gt;500<\/td>\n<td align=\"center\" valign=\"middle\" width=\"69\" height=\"51\">&gt;500<\/td>\n<td align=\"center\" valign=\"middle\" width=\"64\" height=\"51\">&gt;10<sup>4<\/sup><\/td>\n<td align=\"center\" valign=\"middle\" width=\"40\" height=\"51\">150<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_799762896662a265de9598\">Chart 7: PAA (peracetic acid) analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"text-align: right;\"><span style=\"font-size: small;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/Interfering-Gas-Data-Charts-7.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/span><\/p>\n<p><!--\n\n\n<\/p><p style=\"text-align: right;\">Click <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/Interfering-Gas-Data-Charts-7.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">here<\/a> to download PDF of this chart.<\/p>\n\n\n-->\n<table style=\"width: 630px; font-size: 8pt ! important;\" border=\"1\">\n<tbody>\n<tr bgcolor=\"#00CC66\">\n<td colspan=\"8\">\n<div><strong>INTERFERING GAS<\/strong><\/div>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" align=\"center\" valign=\"middle\" bgcolor=\"#FF6600\" width=\"96\"><strong> PAA<\/strong><br \/>\n<strong>ANALYZER<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"29\" height=\"29\"><strong>NH<sub>3<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"53\" height=\"29\"><strong>CO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"46\" height=\"29\"><strong>CO<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"72\" height=\"29\"><strong>ethyl alcohol <\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"40\" height=\"29\"><strong>EtO<\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"54\"><strong>Cl<sub>2<\/sub><\/strong><\/td>\n<td align=\"center\" valign=\"top\" width=\"69\" height=\"29\"><strong>isopropyl alcohol<\/strong><\/td>\n<\/tr>\n<tr>\n<td style=\"width: 29px; height: 51px;\" align=\"center\" valign=\"middle\">150<\/td>\n<td style=\"height: 51px;\" align=\"center\" valign=\"middle\">&gt;1000<\/td>\n<td style=\"height: 51px;\" align=\"center\" valign=\"middle\">&gt;10<sup>4<\/sup><\/td>\n<td style=\"height: 51px;\" align=\"center\" valign=\"middle\">&gt;500<\/td>\n<td style=\"height: 51px;\" align=\"center\" valign=\"middle\">&gt;500<\/td>\n<td style=\"height: 51px; background-color: #33ffff;\" align=\"center\" valign=\"middle\">6<br \/>\n[N]<\/td>\n<td align=\"center\" valign=\"middle\" width=\"54\">&gt;500<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"font-size: x-small;\"><span style=\"background-color: #33ffff;\">[N]<\/span> = Negative interference<\/span><\/p>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>\n\n                <p class=\"trigger \">\n                    <a href=\"#toggle_411989926662a265de95c3\">Chart 8: NH<sub>3<\/sub> (ammonia) analyzers<\/a>\n                <\/p>\n                <div class=\"toggle_container\" style=\"display:none;\">\n                    <div class=\"block\">\n                        \n<p style=\"padding-left: 40px;\">Chart <a href=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/nh3_sensor_cross_sensitivity_chart.pdf\">as pdf<\/a><\/p>\n<\/div>\n                <\/div>\n            <div class=\"clear\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Please reach out for an updated list of data on interfering gas. The data on this web page is for our legacy products and we are actively working on updating it. Reach out here. No analytical method is completely specific. Gases present in the environment, other than the &#8220;target&#8221; gas of measurement, may affect instrument&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":9690,"menu_order":105,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.5 (Yoast SEO v22.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Interfering Gas Data - Interscan Corporation<\/title>\n<meta name=\"description\" content=\"Useful tables of interfering gas data--shwoing how various gases might interfere with measurments of your target analyte.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.gasdetection.com\/the-tech-center\/instrument-sensor-performance\/interfering-gas-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Interfering Gas Data - 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