Review on UEi Test Instruments CO71A Handheld Digital Carbon Monoxide Detector, Portable CO Meter with 0-999ppm Range, Visual and Audible Alerts, CO Monitor Tester + Battery Included by Rhett Fifer

I work in the boiler room and go into the apartments of the residents. And at first we went to several boiler houses in various places on weekends. Everything for the detection of CO is very important. I was in class for work and the teachers recommended I take it with me. As I said, when I go to the tenants' apartment, they have a stove for heating, and I want to live as long as possible. There are no signals yet, but who knows. It's better to be safe than to die!