Ximimark 3Pcs MQ135 MQ-135 Air Quality Sensor Hazardous Gas Detection Module for Arduino
- High quality dual panel design with power indicator and TTL signal output indication..
- TTL output valid signal is low level, (output low signal light, which can be accessed microcontroller IO port)..
- Analog output with increasing concentration, the higher the concentration, the higher the voltage..
- A hazardous gas detection apparatus for the family, the environment. Suitable for ammonia, aromatic compounds, sulfur, benzene vapor, and other gases....
- Long service life, stable and reliable. Has fast response and recovery features..