10pcs MQ-4 Methane Natural Gas Sensor Module Shield Liquefied Electronic Detector Module

Specification The gas sensing material used in the MQ 4 gas sensor is tin dioxide SnO2 with low conductivity in clean air When there is a flammable gas in the environment where the sensor is located the conductivity of the sensor increases as the concentration of flammable gas in the air increases A simple circuit can be used to convert the change in conductivity into an output signal corresponding to the gas concentration The MQ 4 gas sensor has high sensitivity to butane propane and methane and has a good balance between methane and propane This sensor detects a wide range of flammable gases especially natural gas and is a low cost sensor for a variety of applications Suitable for monitoring equipment for liquefied gases natural gas and gas in the home or industry Excellent resistance to ethanol and smoke Features 1 It adopts high quality double panel design with power indication and TTL signal output indication 2 It has DO switch signal TTL output and AO analog signal output 3 The TTL output valid signal is low When the output is low the signal light is on it can be directly connected to the MCU or relay module 4 The voltage of the analog output the higher the concentration the higher the voltage 5 It has good sensitivity to gas and natural gas detection 6 there are four screw holes for easy positioning 7 product dimensions 32 L 20 W 22 H 8 has a long service life and reliable stability9 fast response recovery character