The BM22S3221-1 is an electrochemical CO (Carbon Monoxide) detector sensor, mainly used to detect carbon monoxide. When the carbon monoxide 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 CO detector by supplying power to this sensor and monitoring the alarm output pin.
Each BM22S3221-1 has been calibrated at the factory to maintain consistent characteristics. The calibrated alarm threshold is 180ppm.
Dimension: 20 x 24 x 21 mm
Net Weight: 7.8g