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Environmental Controllers & CO2
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Green Air CD-Electra-48-E-NG co2 Generator
$599.95

Electric ignition Green Air Propane CO2 generator.

Green Air Heat Removal Tube
$69.95

Using a Green Air Electra-Air CO2 Generator that you want to make air cooled? For maximum heat dispersal use the Green Air Heat Removal System.

Green Air Interfacing Rly IR-2
$119.95

The IR-2 provides the switching function to isolate two separate equipment controllers.

Sentinel CHHC-4 Total Environmental Controller
$799.95

The CHHC-4 Total Environmental Controller has the same button controls, layout and design as its predecessor, the CHHC-1, but we've made some drastic improvements!

Sentinel CPPM-4 CO2 Controller
$659.95

The CPPM-4 controls your carbon dioxide levels with part-per-million accuracy. It uses a CO2 sensor that is extremely accurate and features a ten-year life expectancy.

Sentinel EVC-2 Environmental Controller
$299.95

The EVC-2 controls your temperature and humidity with digital accuracy. Photocell allows day/night temperature and humidity settings and also provides daytime CO2 operation.

Sentinel HID-2 Lighting Control
$167.95

HID-2 is the newest Sentinel all-digital lighting controller. It's 24 hour digital time clock with battery backup turns on (2) receptacles.

Sentinel MDT-1 Master Digital Time
$219.95

100% digital lighting and recycling timer that combines 2 main timing functions in one convenient package. Control lighting schedules with 24-hour time clock.

Sentinel PXM-1/Power Exp. 120V
$99.95

Power Expansion Modules increase the number or size of lights, fans, air conditioners and pumps in your growing area that can be automated.

Sentinel PXM-2/Power Exp. 240V
$119.95

Power Expansion Modules increase the number or size of lights, fans, air conditioners and pumps in your growing area that can be automated.

Sentinel UTC-1 Universal Temp.
$144.95

Simple to use, 100% digital temperature controller. Photocell allows separate day and night temperature settings. Record and recall minimum and maximum temperature levels.

Sentinel VCG-27 LP co2 Generator
$679.95

The VCG generators are the safest and most advanced CO2 generators available today. Propane or natural gas, electronic ignitions eliminate the open pilot flame.