Review on 🌱 Rechargeable Formaldehyde Monitoring for Temperature Control in Nurseries by Neil Bodell

Monitor displays 500 when turned on, regardless of ambient CO2 levels. Leaving it in the same place but turning it on and off gives new readings that can vary by 200-500ppm. The outdoor reading was 500, which should have been 400-425. Temperature and humidity are normal. All in all, this device was a random number generator, so I returned it. I had high hopes for this beautifully built device but it is useless for CO2 monitoring. Note. I have professional experience in measuring CO2.