Amphenol SGX Sensortech IR25 Infrared Dual Gas Sensors

Amphenol SGX Sensortech IR25 Infrared Dual Gas Sensors utilize the Non-Dispersive Infrared (NDIR) principle to detect and monitor the presence of gases in portable and fixed mining systems. 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. The IR25 Sensors are suitable for reliable monitoring of gas levels where sensor size is restricted and requires a flameproof enclosure for hazardous environments. These sensors contain two active detector elements for simultaneously monitoring CO2 and Methan or Hydrocarbon mixtures. With housing the same size as some single gas sensors from the IR2xxx series, these sensors offer a more cost-effective option 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 to ATEX and IECEx


  • Mining
    • Portable systems
    • Fixed systems


  • Ambient temperature ranges
    • -20°C to +60°C operation
    • -20°C to +55°C storage
  • 30kPa to 130kPa operational 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
    • >10 years at 5V operation
    • >20 years at 3V operation
Publicado: 2017-05-11 | Atualizado: 2022-03-23