Product ReviewsMq-7 Carbon Monoxide Co Gas Sensor Detector Module for Arduino US

It works.

I am making an automatic carbon monoxide shutoff out of it for an electric generator, and it has all of the necessary sensory circuits in it. All that's needed is a ttl driven relay wired into the off/on circuit of the generator like the Arduino Shields Sensors Modules Programmers Relay and a few other support devices like a 5 volt power supply and a ttl signal inverter chip and you've got one made. Read full review...

Verified purchase:  Yes | Condition: new | Sold by: envistia