Smoke sensor module MQ - 2/3/4/5/6/7/8/9/131/135/136/139/137/138

MQ series gas detection sensor

The gas sensing material used in the MQ gas sensor is tin dioxide (Sn02), which has a low conductivity in clean air. When there is combustible gas in the environment where the sensor is located, the conductivity of the sensor increases with the increase of the concentration of combustible gas in the air. A simple circuit is used to convert the change in conductivity into an output signal corresponding to the concentration of that gas. The MQ gas sensor has high sensitivity to sensitive gases such as liquefied gas, propane, hydrogen, and is also ideal for the detection of natural gas and other combustible vapors. This sensor can detect a variety of combustible gases and is a low-cost sensor suitable for a variety of applications
Introduction of product features and advantages
1, the use of high-quality double panel design, with power indication and TTL signal output indication;
2, with DO switching signal (TTL) output and AO analog signal output;
3. The effective signal of TTL output is low. (When the output low level signal light, can be directly connected to the microcontroller or relay module);
4, analog output voltage, the higher the concentration of the voltage is higher;
5. Good sensitivity to methane and natural gas detection;
6, there are four screw holes for easy positioning;
7, product dimensions :32 (L)*20 (W) *22(H)
8, with long-term service life and reliable stability 9, fast response recovery characteristics