Description :

-Uses MQ7 probe to detect Carbon Monoxide (CO) concentrations in the air from 20 to 2000ppm
-Sensitivity can be adjusted with a potentiometer
-Output is proportional to the density of gas
-Can be read using analog reading
-Comes with a Gravity Interface for easy plug-and-play use
-Compatible with Arduino IO expansion shield for connecting to an Arduino microcontroller.

–Specifications:

•Power supply needs: 5V
•Interface type: Analog
•Pin Definition: 1-Output 2-GND 3-VCC
•High sensitivity to carbon monoxide
•Fast response
•Stable and long life
•Size: 40x20mm(1.57″x0.79″)