Amphenol SGX Sensortech IR15 Infrared Dual Gas Sensors

Amphenol SGX Sensortech IR15 Infrared Dual Gas Sensors use the Non-Dispersive Infrared (NDIR) principle to detect and monitor the presence of gases. With an infrared source and specific filtering on the pyroelectric detectors mounted inside the optical/gas cavity, individual gases or types of gas can be identified and concentrations determined. These sensors are suitable for reliable monitoring of gas levels in general safety applications where sensor size is restricted and a flameproof enclosure for hazardous environments is required. The IR15 sensors contain two active detector elements for simultaneously monitoring of CO2 and methane or hydrocarbon mixtures in the same size housing as some single gas sensors, making them more cost-effective than two separate sensors.


  • For detection of the following gases:
    • Carbon Dioxide and Hydrocarbons
    • Hydrocarbons mixtures
  • Gas concentration ranges:
    • 0 to 5% Carbon Dioxide (also suitable for 0 to 0.5%v/v)
    • 0 to 100% Carbon Dioxide (also suitable for 0 to 10%)
    • 0 to 100%v/v Hydrocarbons (also suitable for 0 to 100%LEL)
  • 19mm sensor height
  • Embedded thermistor for improved temperature compensation
  • Diffused gas sampling via mesh
  • Low power
  • Reference channel for self-compensation
  • Special gold plated optical gas cavity for stable signal levels
  • Operational in varying temperatures, pressures, and humidity
  • Fast response
  • Rugged stainless steel construction
  • No moving parts
  • Immunity from ‘poisoning’
  • Reliable fail-safe operation
  • Certified: ATEX, IECEx, CSA, and UL


  • Oil and gas
  • Petrochemical
  • Biogas
  • Wastewater
  • Utilities
  • Steelworks
  • Confined space entry
  • Indoor air quality


  • -20°C to +55°C ambient temperature range
  • 30kPa to 130kPa operation pressure range
  • 0 to 95% relative humidity, non-condensing
  • 3VDC to 5VDC supply to detectors
  • 180mW typical power at 5V
  • +5V, 60mA IR source supply
  • 20s maximum response time
  • MTBF (IR source only)
    • >10-years for 5V operation
    • >20-years for 3V operation
Published: 2017-05-03 | Updated: 2022-03-22