Sentinel / GPS Day/Night Environmental Control
The CHHC-4 controls all of your growing area conditions accurately and reliably. First of all, it has all of the C02 control features of the CHHC-1 and CPPM-1. It also has the ability to control 3 other devices, a heating device and a humidity device. Records the min and max temperature, humidity and C02 levels. Unlike some C02 controllers, the CHHC-4 is able to be calibrated by the user with the self calibration feature.NEW Green LED lights make this unit very plant friendly NEW Removable combination remote temp, humidity, light level & CO2 probe allows the CHHC-4 to be placed up to 16 feet awayNEW Protective caps to help prevent water from getting into the controller Monitors and controls CO2 with PPM accuracy Also controls 3 other devices, a heating device, a cooling device and a humidity device Separate day/night temp and humidity settingsRecords the min and maxi temp, humidity and CO2 levels Has 2 separate outputs to control cooling and heating Can increase or decrease the amo