{"id":96,"date":"2012-05-26T10:49:32","date_gmt":"2012-05-26T17:49:32","guid":{"rendered":"https:\/\/www.gasdetection.com\/?page_id=96"},"modified":"2021-03-01T10:15:12","modified_gmt":"2021-03-01T18:15:12","slug":"sensor-principle-of-operation","status":"publish","type":"page","link":"http:\/\/www.gasdetection.com\/the-tech-center\/instrument-sensor-performance\/sensor-principle-of-operation\/","title":{"rendered":"Sensor Principle of Operation"},"content":{"rendered":"

\"Sensor<\/p>\n

The electrochemical sensor principle of operation is described as follows:<\/p>\n

Gas molecules from the sample are adsorbed on an electrocatalytic sensing electrode, after passing through a diffusion medium, and are electrochemically reacted at an appropriate sensing electrode potential. This reaction generates an electric current directly proportional to the gas concentration. This current is converted to a voltage for meter or recorder readout.<\/p>\n

The diffusion limited current, i<\/strong>lim<\/sub>, is directly proportional to the gas concentration according to the simplified equation…<\/p>\n

<\/div>\n

i<\/strong>lim<\/sub> =<\/strong> <\/span> nFADC<\/span><\/span>
\n\u03b4<\/span><\/p>\n

<\/div>\n

where i<\/strong>lim<\/sub> is the diffusion limited current in amps, \u00a0 \u00a0F<\/strong> is the Faraday constant (96,500 coulombs), \u00a0 \u00a0A<\/strong> is the reaction interfacial area in cm2<\/sup>, \u00a0 \u00a0n<\/strong> is the number of electrons per mole reactant, \u00a0 \u00a0\u03b4 is the diffusion path length, \u00a0 \u00a0C<\/strong> is the gas concentration in moles\/cm3<\/sup>, \u00a0 \u00a0and D<\/strong> is the gas diffusion constant, representing the product of the permeability and solubility coefficients of the gas in the diffusion medium.<\/p>\n

\n
\n

 <\/p>\n

For more information on our analyzers, visit the Products section<\/a> of this website<\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

The electrochemical sensor principle of operation is described as follows: Gas molecules from the sample are adsorbed on an electrocatalytic sensing electrode, after passing through a diffusion medium, and are electrochemically reacted at an appropriate sensing electrode potential. This reaction generates an electric current directly proportional to the gas concentration. This current is converted to…<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":9690,"menu_order":130,"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":"\nSensor Principle of Operation - Interscan Corporation<\/title>\n<meta name=\"description\" content=\"The INTERSCAN sensor principle of operation is presented.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.gasdetection.com\/the-tech-center\/instrument-sensor-performance\/sensor-principle-of-operation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sensor Principle of Operation - Interscan Corporation\" \/>\n<meta property=\"og:description\" content=\"The INTERSCAN sensor principle of operation is presented.\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.gasdetection.com\/the-tech-center\/instrument-sensor-performance\/sensor-principle-of-operation\/\" \/>\n<meta property=\"og:site_name\" content=\"Interscan Corporation\" \/>\n<meta property=\"article:modified_time\" content=\"2021-03-01T18:15:12+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.gasdetection.com\/wp-content\/uploads\/sensor_principle_of_operation.jpg\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"http:\/\/www.gasdetection.com\/the-tech-center\/instrument-sensor-performance\/sensor-principle-of-operation\/\",\"url\":\"http:\/\/www.gasdetection.com\/the-tech-center\/instrument-sensor-performance\/sensor-principle-of-operation\/\",\"name\":\"Sensor Principle of Operation - 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