Sentinel GPS


Environmental Controller

Comes with:

  • Familiar "analog" controller.
  • Built-in photocell controls CO2.
  • Heavy gauge #14 AWG cables and wire.
  • Super-duty 30-amp relays for long life.
  • Power switch and re-settable 15-amp circuit breaker provides over-current protection.


  • The EVC-1 is a very flexible and useful controller.
  • It combines the ability to control temperature, humidity, a CO2 device and a Night device all in one neat package.
  • The user can select one of 3 different modes and feel safe using it with a re-settable table circuit breaker and heavy-duty components and wiring.
  • Simplest to use, easy to own.
  • 3 year warranty.

How to use:

    • The unit comes with a metal bracket that is first attached to a wall. Secure the bracket to the wall with 2 screws. Then use the 2 thumb screws to secure the enclosure to the bracket.
    • The device(s) that will be controlled by the EVC-1 must be 15-amp or less COMBINED load. There are FOUR outlets (receptacles) on the EVC-1 One of them is used to control the temperature devices like AV or fans. Another receptacle is to connect your humidity device like a humidifier or dehumidifier. A CO2 receptacle is provided that will activate a CO2 device during the day, with or without coordination with the temperature control device. The 4th receptacles called "Night Device" activates a device like dehumidifiers, exhaust fans etc. that is only to be operated at Nighttime. It has a built-in photocell that senses whether it is Day or Night.
    • The unit requires a 15-amp power supply. Plug the power cable into a standard wall outlet. The built-in circuit breaker will protect the unit from overloads. Select the mode of operation you want the unit to ,./function with, set your temperature and humidity level and then... sit back and let the EVC-1 do the work for you.

  • For indoor growing, cooling devices such as ventilation fans or air-conditioners connect to the temperature device.
  • Dehumidifier or a humidifier can be connected to the humidity device receptacle.
  • Heaters for cooler climate greenhouses can be connected to the night device receptacle
  • Connect your compressed CO2 solenoid / regulator assembly OR a CO2 generator to the CO2 device receptacle.

Humidity Accuracy +/- 7%rH
Temperature Mode Cooling
Humidity Mode Dehumidify or Humidify
Min/Max Operating Temperature 32' to 120' F
Min/Max Operating Humididity 0-99% RH
Temp Sensor Length 3 ft
Dimensions 8" x 6.5" x 3.1"


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Marin Hydro