Portable Digital Temperature Humidity Indoor 9999ppm NDIR Sensor IAQ CO2 Monitor Wet Bulb Temperature (WB) Dew Point (DP) Tester CO2 Monitor for Indoor Air Quality (IAQ) Diagnosis

Looks easy to use, does what it needs to do out of the box which is just what I want. I Need it for monitoring ventilation levels in fitness classes with the covid regulations.

Great seller. As described. Thank you.

Happy

I have been having what I assume is an exhaust leak in my car. However I have a very sensitive sense of smell and I didn't want to spend a lot of my time and effort fixing what may be a very small problem. Initially I tried a CO meter however the meter itself was defective. On further investigation I determined that a CO meter was not what I needed anyway. Most modern cars do not output very much CO at all. The catalytic converter converts most CO to CO2 or water. Also, trying to detect CO means detecting a few parts per million. That's difficult. With a CO2 meter it's much easier because any decent sized exhaust leak will VERY quickly spike the CO2 levels in the car. Also, the measurements will be in the 1000s of parts per million so the error range of the meter is less important. In short, if you're looking for exhaust leaks in vehicles it will likely be easier with a CO2 meter as car exhaust is chock full of CO2. On to this meter, it works very well. I tested it in a number of situations and it detected the amount of CO2 that i would expect it to. The manual states that it samples the air once a second and as far as i can tell this is accurate. However, it is not meant to precisely measure the CO2 concentration every second. The sensor takes time to accurately reflect the ambient CO2 level. This is easy enough to test by breathing briefly on the sensor which will cause it to easily jump to over 5000ppm but it will take 30 or more seconds to return to normal. In my own car I found that the CO2 level was no different from my friend's car. So whatever I'm smelling on hard acceleration it is very likely not exhaust gases or is such a tiny amount that it's not adding to CO2 levels. That is a helpful thing for me to know. Further, this meter has applications beyond just testing the cabin of a car. It can also be used in buildings to determine if the amount of ventilation is adequate. Also, it can be used in the home to see if CO2 levels are too high (as can occur particularly when cooking or using a fireplace). I was surprised to see that in both my car and my friend's car, with the air on recirculate, we reached over 1500ppm in just a few minutes. It comes in a cute carrying case that looks like a tiny plastic briefcase. I can't imagine I'd ever use it but if you want to look like a real "pro" it can't hurt to have your meter in it's own case.

I tried saving money and bought a cheaper one first. Ended up breaking down and buying this one after, It gives fast and accurate readings. Feels and looks like a quality instrument, but have only used it for monitoring one Cannabis grow so far.

Only used for a day. Responds fairly quickly to CO2 changes. I haven't compared with lab equipment, but reads about 430ppm outside (in city and during West Coast wildfire event). Noted very high levels of CO2 since we have windows closed. I would have preferred to have power supply and data cable included.

Love how this helps us locate co2 leaks.

Unit is accurate for actual CO2 readings. Compared against a laboratory standard meter with same results. Good value.