Klein Tools ET110 CO Meter, Carbon Monoxide Tester and Detector with Exposure Limit Alarm, 4 x AAA Batteries and Carry Pouch Included

Appears to work as expected. Reports zero when in clear air. Reports over 300PPM when placed about 4ft from UTV exhaust (it's a 20 year old gas engine). The response time was 2-3 seconds 4ft from gas engine exhaust and readings zoomed over 300ppm and I moved away. Real world quick test appears to work. I tested our home air ducts in several places with this meter and all of them read 0. We wanted to put a number to CO ppm in addition to the smoke detectors with CO detection which always show OK without any numeric value. Having a good quality meter seems like a wise idea if you have natural gas or propane heating. I am happy with the unit after one use. Note: If you are a home owner and not likely to use the meter very often, consider removing the AAA batteries after each use so there is no chance of a battery leaking into the meter.

Easy to use quality Meter

Una opción muy económica para los que usan en mina, funcional pero muy grandes

I bought this because we have had 2 CO alarms go off at like 10PM, which is no fun. Yup fire dept and local natural gas tech had to show and clear our house of CO leaks, BEFORE we could get back in our house. Turns out our gas fireplace had glass chips in it - something great new idea apparently - but they we covering up the air slots in the interior of the gas fireplace. So the CO was being kept down inside the fireplace, instead of pulling in the fresh air from the house. Once I removed the glass chips it did fix the problem!!! But I wanted to be sure and not get the opportunity to be stuck outside again! Thanks to a local fireplace install company! I kept the Klein CO sensor running for a couple of hours and no CO!!!

Great product! Fast delivery... Thanks :-)