IGM-11 fixed optical gas detector


User manual


IGM-11 gas detector is intended for single-gas continuous measurement, indication transmitting the reading. IGM-11 is a full-featured gas detector for monitoring of gases in environments, according to device gas types designation: oxygen (О2), carbonic oxide (CO), hydrogen sulfide (H2S), sulfur dioxide (SO2), nitrogen dioxide (NO2), ammonia (NH3) and hydrogen (H2).


Main features

  • Easy mounting and wiring
  • Bright four digit seven-segments LED display and 4 LED for status indication
  • Wide temperature range of operations
  • Wide range of output signals: RS-485/ 3 Relays/4-20 current loop/ HART
  • Easy magnet calibration
  • Microprocessor based transmitter and detection unit
  • Self-diagnostics algorithm firmware
  • Proven electrochemical sensors technology
  • IP67 full resistance
  • Power and cost effective solution


Technical specification


Gas sampling method:


Operating principle:

Electrochemical cell

Target gas

О2, CO, H2S, SO2, NO2, NH3, H2.

Operating conditions:

Relative humidity

up to 98%

Atmospheric pressure

80-120 kPa

Temperature range

 -60... +60 °C

Storage and transportation conditions:

Relative humidity

up to 96%

Atmospheric pressure

80-120 kPa

Temperature range

 -30... +50 °C

Overall dimensions



2,5 kg (AL)

3,5 kg (AISI 316)

Ingress Protection Rating

IP67 acc. IEC60529



Stainless steel (optional)


Digital RS485/ Front panel magnets

Free fall

IEC 68-2-32, 1000 mm

Vibration - sin

IEC 60068-2-6


10 000 hours


15 years


Measurement range

According to Table A.1 Appendix A

Accuracy D

According to Table A.1 Appendix A

Response time, T0.9

30s for О2, CO, H2S, SO2, NO2,

40s for NH3

60s for H2

Temperature performance

D on each 10 °C

Pressure performance

0.5*D on each 3.3kPa

Humidity performance

0.5*D on each 10%RH


Supply Voltage Range:

12 ...32 VDC


4 LEDs front panel , 4 digit seven-segments LED display

Output signals :

RS-485 Modbus RTU, 4-20 mA, 3 Relay output

Power consumption:


Warm-up time:

not more than 60 s


Severity level 2 EN/IEC 61000-4-6, EN/IEC 61000-4-11

Marking and standards

1Exd IIB T4 acc. to IEC60079-0, IEC60079-1, IEC60079-11



Overall dimensions of IGM-11