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IMR EX440 SMART sensor gas detector

IMR EX440 SMART sensor gas detector

The detector uses natural diffusion as the method to detect gas. It is constructed with high strength engineering plastics composites with an antiskid rubber housing. The detector is comfortable to hold, is water-proof, and dust-proof.

  • Intrinsically safe
  • Smart interchangeable module
  • Catalytic, electrochemical, infrared, PID sensor selectable
  • Built-in pump optional
  • Storage for 100,000 detection records
  • Calibration point adjustable
  • Two alarm levels for each channel
  • STEL & TWA alarm for toxic gases
  • Visual, audible, and vibration alarms
  • Data uploading
  • Password management
  • Self-test when power on
  • Modular design for ease of maintenance

The IMR EX440 portable multi gas detector is an intrinsically safe instrument that can continuously detect the concentration of combustible gases and toxic gases. It is designed for use in explosion proof, toxic gas leak rescue, underground pipeline or mines, and other hazardous locations. It effectively ensures the safety of staff life without being invasive and prevents loss of production equipment.

  • Target gas: O2, toxic gas, combustible gas
  • Detecting method: Natural diffusion
  • Response Time: Semi-conductor, Catalytic, Thermal Conductivity t90 < 30s Oxygen, Carbon Monoxide, Hydrogen Sulfide t90 < 30s Other Sensors t90 < 120s
  • Working Conditions: Combustible Gas: -40OC ~ 70OC Toxic Gas: -20OC ~ 50OC Working humidity ≤ 95%RH non-condensating
  • Power Source: Lithium battery (DC3.7V 6600mAh)
  • Charging time: 4 ~ 6hours
  • Continuous working time: ≥ 30 hours (for combustible gas and toxic gas) ≥ 300 hours (for toxic gas under temperature of 20OC)
  • USB connectivity for data transfer
  • Explosion-proof grade: EXIA II CT4
  • Ingress protection: IP66
  • Dimensions: 147mm x 76mm x 37mm
  • Weight: about 350g



  • Use to collect gas samples in confined spaces
  • Telescoping probe
  • Collection tube
  • Probe length: 100 – 1150mm
  • Hose length: 1500mm


  • Use to collect gas samples in confined spaces
  • Calibration


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