BM22S3031-1 Catalytic Combustible Gas Detector Digital Sensor

SKU: BM22S3031-1 Categories: , Manufacturer:

Product specs


25 x 16 x 22 mm

Net Weight:


Operating Voltage:


Operating Current:

< 160mA

Gas Concentration Range:


Product Description

The BM22S3031-1 is a catalytic combustible gas detector sensor, mainly used to detect methane. When the gas concentration exceeds the default calibration concentration, the voltage output of the alarm pin (pin 5) changes from low level to high level (default). It is easy to make a gas detector by supplying power to this sensor and monitoring the alarm output pin.

Each BM22S3031-1 has been calibrated at the factory to maintain consistent characteristics. The calibrated alarm threshold is 9% LEL (Lower Explosion Limit), which is about 4500ppm.


  • Sensor type: catalytic combustible type
  • Operating Voltage: 2.5V
  • Operating current: < 160mA
  • UART interface, 9600 baud rate
  • Gas concentration range: 500ppm~10000ppm
  • Alarm threshold (factory calibration): 4500ppm (9%LEL) (configurable)
  • Full range linear deviation: < 3% LEL
  • Sensor service life: 5 years
  • Default preheat time: 180 seconds (configurable)
  • Factory calibration, good consistency
  • Fault detection function
  • When the gas concentration is detected to exceed the alarm point for five seconds, the sensor alarms (configurable)