Gain Express Wall Mount

works perfectly once you have executed the calibration procedure as described in the manual. this is done outside where nowadays the carbon dioxide level hovers around 400 ppm. the entire procedure is automatic after pushing a few buttons and takes only 5 minutes. the audible alarm can be switched o...

I very much doubt the accuracy of the CO2 monitor. My 15min average at home ranges between 400 and 1500 ppm without any fuel burning nearby. I already ended up moving the alarm threshold twice and am now considering disabling it altogether. Thermomter seems accurate though.

The CO2 monitor worked, but the electrical adapter failed after a few months use. I ordered another monitor and adapter and the new adapter worked on the old monitor. So now I have 2 monitors, I need to find where I can get just the electrical adapter for it.

Pros: * Display is easy to read in the dark from across the room with my LED flashlight. (Some units are not easy to read in the dark with LED type flashlights) * Triple display of CO2/RH/Temp is a bit larger than some due to absence of a graph, which I don't need anyway. * I like the fact that the ...

After reading many reviews of CO2 detectors suitable for home use, I bought this one as the least expensive option that seemed to be a quality product. The $150 price seems like a lot when you compare how little you need to pay to measure just temperature and humidity alone, but apparently the natur...

Accuracy ok. Alarm will not turn fan on until it goes past recommended set point and then it starts buzzing with red led light. Why not have setting to turn fan on before unit goes in alarm mode? This is backwards, how it should operate. Doesn’t matter anyway you have to take outside to calibrate.

It worked okay while it worked. But it died after only 2 years. For the price I think it should have lasted longer. There is no information or contact for service. I don't recommend buying this.

Seems to work well, not sure about calibration without comparing to other devices, temp it is in Centigrade or is it Celsius? You must convert manually to Fahrenheit: C = 5/9(F-32)

The automatic calibration seems to skew the accuracy if you do not place it outdoors or expose it to fresh air regularly. Easy to read.

works good , the numbers go up as more people enter my room. helps me out to pin point high levels of co2