Monitor indoor air quality and carbon dioxide levels in greenhouses. Handheld meter measures and displays temperature, relative humidity and CO2 simultaneously. CO2: 0 to 2000ppm, Accuracy: ±5% Temperature: 14 to 140ºF (-10ºC to 60ºC), Accuracy: ±0.9ºF (±0.9ºC) RH: 0.0% to 99.9%, Accuracy: ±3% Includes 4 AA batteries.
Wall-mount unit has the same features as Item 3440. Also includes a 12VDC adapter.