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The Products Section > Special Edition - Two Point Continuous Gas Monitoring System

In addition to the PLC series of multipoint monitors, generally offered for three or more points, INTERSCAN provides a two point system, configured as an expanded version of our LD Series single point monitor. This two point system, while not equipped with quite the array of automation features as is standard in our PLC-based multipoints, offers the same proven INTERSCAN reliability upon which our customers have come to depend. The LD series two point system is available for all the gases monitored by INTERSCAN.

PLC-based two point systems are also available. Please contact the factory.

Click to see: Two Point System

The system includes:  
 
  • Two INTERSCAN electrochemical voltametric sensors with dedicated pneumatics
  • Two dedicated digital display/controllers. From here, two alarm levels, independently adjustable for each sensor, are set via easy push button operation.
  • Alarm relay contacts for each alarm setpoint, at each sample channel
  • 4-20 mA output for each sample channel
  • Strobe (visual) and piezoelectric (audible) alarm signals, providing an indication in the event that either channel goes into alarm
  • Two remote sample point boxes, each provided with the appropriate end-of-line particulate filter, and 50 feet (15.2 meters) of tubing
 

The monitoring system is housed in a NEMA type 12 steel enclosure provided with a window.

By the way, you're not limited to monitoring two points of the same gas. Two different gases can be incorporated into this configuration as well!


Options

  • Alternative packaging, including Type X or Type Z purged enclosures and RFI resistant enclosures
  • Enclosure heating and cooling
  • Loss of flow alarm
  • Triple alarm set points
  • Loss of power alarm
  • Auto zero
  • Sensor protection circuit
 

Additional Specs

Resolution

0-1999 ppm range1 ppm
0-199.9 ppm range 0.1ppm
0-19.99 ppm range0.01ppm
ppb ranges 1 ppb

Weight:
70 lb (31.8 kg)

Dimensions:
24" H x 20" W x 8.75" D
(610 x 508x 203 mm),
exclusive of alarm signals and enclosure mounting feet.

Specifications common to all Interscan gas detection instruments

Ordering Information:
Two Point LD Series Continuous Gas Monitoring Systems

GAS

MEASURING
RANGE (ppm)

unless otherwise indicated

MODEL NO. †

Br2
bromine
0-1999
0-199.9
0-19.99
0-5
LD270-1999m
LD270-199.9m
LD270-19.99m
LD270-5m
CO
carbon monoxide
0-1999
0-199.9
0-50
LD214-1999m
LD214-199.9m
LD214-50m
Cl2
chlorine
0-1999
0-199.9
0-19.99
0-5
LD234-1999m
LD234-199.9m
LD234-19.99m
LD234-5m
ClO2
chlorine dioxide
0-1999
0-199.9
0-19.99
0-1999 ppb
LD233-1999m
LD233-199.9m
LD233-19.99m
LD233-1999b
C2H4
ethylene
0-1999
0-199.9
0-19.99
0-5
LD207-1999m
LD207-199.9m
LD207-19.99m
LD207-5m
EtO
ethylene oxide
0-1999
0-199.9
0-19.99
0-5
LD220-1999m
LD220-199.9m
LD220-19.99m
LD220-5m
HCHO
formaldehyde
0-1999
0-199.9
0-19.99
0-1999 ppb
LD216-1999m
LD216-199.9m
LD216-19.99m
LD216-1999b
H2NNH2
CH3NHNH2
(CH3)2NNH2
hydrazine(s) ¶
0-1999
0-199.9
0-19.99
0-1999 ppb
LD218-1999m
LD218-199.9m
LD218-19.99m
LD218-1999b
H2
hydrogen
0-1999
0-500
LD202-1999m
LD202-500m
HBr
hydrogen bromide
0-1999
0-199.9
0-19.99
0-5
LD280-1999m
LD280-199.9m
LD280-19.99m
LD280-5m
HCl
hydrogen chloride
0-1999
0-199.9
0-19.99
0-5
LD236-1999m
LD236-199.9m
LD236-19.99m
LD236-5m
HCN
hydrogen cyanide
0-1999
0-199.9
0-19.99
0-5
LD228-1999m
LD228-199.9m
LD228-19.99m
LD228-5m
H2S
hydrogen sulfide
0-1999
0-199.9
0-19.99
0-1000 ppb
LD217-1999m
LD217-199.9m
LD217-19.99m
LD217-1000b
NO
nitric oxide
0-1999
0-199.9
0-19.99
0-5
LD254-1999m
LD254-199.9m
LD254-19.99m
LD254-5m
NO2
nitrogen dioxide

Also known as N2O4
nitrogen tetroxide
0-1999
0-199.9
0-19.99
0-5
LD215-1999m
LD215-199.9m
LD215-19.99m
LD215-5m
O3
ozone
0-1999
0-199.9
0-19.99
0-5
LD248-1999m
LD248-199.9m
LD248-19.99m
LD248-5m
PrO
propylene oxide
0-1999
0-199.9
0-19.99
0-5
LD232-1999m
LD232-199.9m
LD232-19.99m
LD232-5m
SO2
sulfur dioxide
0-1999
0-199.9
0-19.99
0-5
LD224-1999m
LD224-199.9m
LD224-19.99m
LD224-5m

  † These are the new model numbers. Certain other sources may not reflect this system, while the changeover is occurring. If in doubt, specify the gas and the measuring range desired.

  ¶ There is not a separate analyzer available for each of these compounds, and the sensor does not respond equally to all hydrazine species. The analyzer must be calibrated with the specific hydrazine compound of interest.

Analog or control output can be set to meet individual needs.  e.g. 0-1 V and 4-20 mA could be specified to equal 0-100 PPM CO on the LD214.

Special ranges available on request—The panel meter can be factory programmed to display any desired full scale range, within the measuring capability of the instrument.


  

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