Review on Extech CO240 Portable Carbon Dioxide Quality Analyzer by Wayne Ohlrogge

1. CO2 readings are accurate, but sometimes readings get wrong if you accidentally shake the meter. Really sensitive type of meter.2. Temperature - I think it's a little over +1C compared to my Fluke 971 calibrated meter. The response time is too slow and you have to wait a bit to get the correct reading. In my case I need a quick answer because I am doing an energy audit and of course I have to measure many points. It took me more days to complete the task due to the slow response time.