Sentinel combined digital temperature and humidity controls together in one flexible unit called the EVC-2 Environmental Controller. Additional features include activation of a Night Device AND a CO2 device. 

The EVC-2 is a 100% digital and programmable controller that has been designed to maintain a specific temperature and humidity within a growing area. It controls temperatures by operating a device such as an airconditioner, exhaust fan or heater. The humidity is separately controlled and can be set to either increase or decrease the humidity to a specific level.

The photocell allows day / night temperature and humidity settings and also aids in controlling CO2 operation. The EVC-2 coordinates the use of supplemental CO2 with the temperature control function. It has separate Day and Night humidity settings that provide remarkable control of critical humidity levels, especially at night. With this environmental controller you can record and recall minimum and maximum temperatures and humidity levels.

The remote temperature probe can be placed up to 16 feet from the controller to more accurately control the temperature. Designed with five receptacles to control up to 15-amps of power. The EVC-2 environmental controller also has a built-in, re-settable circuit breaker.

Specs:

Min / Max operating temperature: 32 to 120° F
Min / Max Humidity: 0-99% RH
Humidity Mode: Humidify or Dehumidify
Humidity Accuracy: +/- 3% RH
Temperature Accuracy: +/- 1° F
Temperature Mode: Heat or Cool
CO2 Mode: Day or Night
Remote sensor length: 16 feet
Amps / Volts requirements: 15 amps @ 120 volts
Dimensions: 8" high x 6.5" wide x 3.1" deep
Weight: 7 lbs
Life Expectancy: 10+ years

Carries a manufacture 3-year warranty. Space from electronic ballast by at least 8 feet.

More info (PDF format)