MQ-7 Gas Detector Sensor Module CO Monitor Sensor for Arduino ICSG017A LM393

http://www.icstation.com/detector-sensor-module-monitor-sensor-arduino-icsg017a-lm393-p-5088.html

Description:
Size: 32mm(L) x 22mm(W) x 30mm(H)
The main chip: LM393, MQ-x gas sensing probe;
Working voltage: DC 5V
With signal output indicator light
The dual signal output (analog output and TTL output)
The analog output the voltage. The higher the concentration, the higher the voltage
With high sensitivity to sulfide, benzene vapor, smoke and other harmful gases
With a long service life and reliable stability
Quick response and recovery characteristics
With mounting holes, easy for mounting

Application :
Detection of the ammonia, aromatic compounds, sulfide, benzene vapor, smoke and other harmful gas
The concentration range of gas sensitive components is from 10 to 1000ppm.