Package Includes: 1 piece x MQ 7 Carbon Monoxide ( CO ) Coal Gas Sensor detector Module
 
This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. This module uses 
MQ7 CO gas sensor as a gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.
For Digital output the threshold value can be easily set by an on-board potentiometer. Using this module you can easily interface MQ7 CO gas Sensor to any Microcontroller, Arduino or even Raspberry Pi.
MQ7 is a  Carbon Monoxide (CO) sensor, suitable for sensing Carbon Monoxide concentrations(PPM) in the air. MQ7 Gas sensor can measure CO concentrations ranging from 20 to 2000 ppm. 
 
Features:
High sensitivity to carbon monoxide
Stable, long life and low cost
Good sensitivity to Combustible gas in wide range
High sensitivity to Natural gas
Simple drive circuit
Domestic gas leakage detector
Industrial CO detector
Portable gas detector
 
Specifications:
Detection of gas: carbon gas
Heating voltage: 5 ± 0.2V (AC · DC)
Working current: 140mA
Loop voltage: 10V (maximum DC 15V)
Load resistance: 10K (adjustable)
Detection concentration range: 10-1000ppm
Clean air voltage: =1.5V
Sensitivity: =3%
Response time: =1S (preheat 3-5 minutes)
Response time: =30S