Handheld Carbon Monoxide Meter, Portable Battery Powered Carbon Monoxide Detector, CO Gas Tester with LCD Color Display, 3-in-1 CO Notification Detector(CO, Temperature and Humidity Display)

Being an OlGeezer X landlord having one of these to deal with the unscrupulous HVAC repair men is PRICELESS . My old meter went out and was having limit switch problems on my house . The repair tech reset the limit switch and said if it continues to trip it was probabally the heat exchanger and a $5000. bill for a new heater . The limit switch was faulty and triggering at 150 degrees instead of the rated 215 degrees . Replaced the switch for ten dollars and this little meter is reading zero CO for the last few hours . Ift you don't trust HVAC men then verify with your own equiptment . CHEAP INSURANCE .

seems cheap but its works, the price should be lower

Seems to work. Only thing I do t like is it reads the temperature in Celsius only.

This device doesn't work properly .Someone stole my catalytic converter on my work van and i started to feels the smoke was coming in to the car. I bought this device to confirm but it reads 0 concentration of co inside the car, then i bring it next to the space where the catalytic converter was originally placed and still the same measurement even though i wasn't able to stay there for more than 30 seconds cause the co .

Great for making sure furnace and gas appliances aren't leaking

It was exactly what he wanted.

For the money it is very easy to use. It fits in your hand nicely.

Haven't identified toxicity yet