【MICS-5524】MICS5524 Air Quality Gas Sensor Module Carbon Monoxide Hydrogen Methane. This sensor is sensitive to CO, ammonia, ethanol, H2 and methane/propane/isobutane. However, it cannot tell you what gas it has detected. 【Compatible】This breakout plate is not for any safety, medical, or finished product use. We sell it for education and hobby experimentation and do not guarantee it for any other purpose! All gas sensors require calibration for precision output. 【Easy Operation】Power it with 5VDC and read the analog voltage on the output pin. When gases are detected, the analog voltage will increase in proportion to the gas detected. When on, the heater draws between 25 and 35 mA. 【High Performance】You can use the EN pin to power off (pull it to 5V to power off) to conserve power. Just be sure to wait a second after turning on the heater to make sure it's all warm before taking readings. 【Characteristics】Carbon monoxide CO 1 - 1000 ppm; Ethanol C2H5OH 10 - 500 ppm; Hydrogen H2 1 - 1000 ppm; Ammonia NH3 1 - 500 ppm; Methane CH4 >1000 ppm, Manufacturer: TECNOIOT