Sentinel CHHC-1 Cooling Heating Humidity and CO2 Controller 

The Sentinel CHHC-1 controls all of your growing area conditions accurately and reliably. This one unit controls the cooling, heating, humidity and CO2 in your grow room. 

The CHHC-1 gives you one-touch calibration of the CO2 sensor with simple pushbuttons to enter desired PPM settings and display the current CO2 PPM readings. Can be operated in "Fuzzy Logic" mode for compressed CO2 or On/Off for CO2 generators. There's a CO2 receptacle to connect CO2 generator or 120 volt compressed CO2 solenoid / regulator assembly. The CHHC-1 also has a 12 volt power supply to connect to any temperature controller so that the CO2 devise will be disabled when the fan is operating to prevent CO2 depletion.

Along with complete CO2 control, the Sentinel CHHC-1 can be set for separate day and night settings for both temperature humidity. It records the minimum and maximum temperatures, plus humidity and CO2 levels.

A built-in self-calibration feature allows you to calibrate the controller if you prefer. There are 2 separate outputs to control cooling and heating. You can increase or decrease the amount of humidity in the growing area while also controlling carbon dioxide with Part Per Million accuracy.

The Sensor Probe is housed in a separate remote sensor enclosure that allows the probe be placed up to 15 feet away from the controller. The probe can be placed inside the growing area and the controller outside the area - a nice feature for enclosed grow rooms or chambers. The sensor registers temperature, humidity, CO2 and light.

Specs:

Amps / Volts requirements: 15 amps @ 120 volts
Min / Max operating temperature: 32 to 120° F
Min / Max operating Humidity: 0-99% RH
Temperature Measurement range: 32 to 122° F
Temperature Accuracy: +/- 1.8° F
Humidity Measurement range: 10 to 95% rH
Humidity Accuracy: +/- 3% rH
Light Sensor sensitivity: Adjustable
CO2 Measurement range: 0-2500 PPM
CO2 Accuracy: +/- 75 PPM
Weight / Dimensions: 5 lbs / 8" x 6.5" x 3.1"
Life Expectancy > 10 years

The Sentinel CHHC-1 has an easy to read LED display. Carries manufacturer's 3 year warranty.

More info from the Manufacturer (PDF format - Lots of detail.)