Atlas 5  Portable handheld CO2, Temperature and Humidity monitor
Atlas 5 Portable handheld CO2, Temperature and Humidity monitor at HorticultureSource.com -
Atlas 5 Portable handheld CO2, Temperature and Humidity monitor Features: Monitors CO2 range from 0- 9999 ppm Monitors Temperature range from 14 to 140 Monitors Humidity range from 0.1% to 99.0% Backlit LCD display with auto shut-off feature Uses 4 AA batteries (included) 1 year warranty MSRP $299.95