ATEX and cUL approved 2-wire loop powered ambient hydrogen sulfide monitor

  • intrinsically safe
  • sensitivity 1 PPM H2S
  • menu driven touch panel controls
  • easy access to the sensor for service
  • 4-20 mA Loop Power



ULc Class I Div I Group C, D

ATEX Directive 94/9/ II 2G

Ex d [ib] ib IIB T4 Gb

Tamb -10oC to 50o


Application: Trace PPM H2S in ambient air for personnel safety Analysis Ranges: 0-20, 0-50 and 0-100 PPM Full Scale
*Accuracy: <2% of FS under constant conditions Linearity:

±2% of full scale

Sensitivity  <0.5% of full scale Response Time

90% of step change in 35 sec

Area Classification: cUL for use in Class 1, Division 1, Group C, D Approvals:


Ex ib IIB T4 Tamb –10oC to +50oC

Calibration: Span gas 50-100 PPM H2S balance air Alarms: None
Sample System: N/A Sample Controls: None
Display: LCD 2.75” x 1.375”; resolution 0.1 PPM; Controls: Menu driven range selection, calibration and system functions
Flow Sensitivity: N/A Compensation: Temperature compensated output
Pressure: Ambient +/- 10% of ambient pressure Power: 18-24 V DC 
Sensor Life: 24 months at 25ºC and 1 atm Sensor Model: OSV -72-7HH/LM
Operating Range: Recommended –10ºC to 50ºC Signal Output: 4-20 mA Loop Current
Enclosure: Aluminum ex-proof, fiberglass, 21x9x6” Type 3R Warranty: 12 months analyzer; 12 months sensor
Wetted Parts: Stainless Steel Weight: 20 Ibs Stainless steel