• Displays the indoor and outdoor temperature using wireless sensor
• Displays the indoor humidity levels
• Automatically sets itself to the U.S. Atomic Clock and adjusts for Daylight Savings Time.
• Calculates comfort level based on temperature and humidity readings
• Ice Alert function flashes icon when outdoor temperatures near freezing
• Wirelessly transmits weather data 100 ft away
• Displays the day and month in five languages for easy reference
• Customizable temperature and humidity alarm alerts user to set high or low temperature levels outdoor temperature range from -22°F to 140°F
• Unit package measurements: 10” Long x 3.8” Deep x 9.1” High
• Take 2 AA batteries not included
• Alarm sounds if min or max temperature reached

Odor-Sok Air Filters are constructed using bundles of microscopic activated carbon filaments and fibres. By controlling fibre width to 20 nm, the absorption rate of carbon cloth is similar to that of a single exposed carbon particle. Air flows evenly across teh carbon and with accelerated absorption and increased surface area, Odor-Sok Air Filters retain all the properties of traditional canister filters. Faster absorption rates means smaller filter equipment and up to thirty times less carbon in use for the same result over a one-year period. That's how!

$139.99

$44.99

$159.99

$144.99

104.99

$179.99

$179.99

269.99

Tempsat Day/Night The iGS-021 temperature controller will operate your heating or cooling equipment in accordance to user day and night set points. Does not have a display. One year warranty. Free shipping for the contiguous 48 states

DRT-1 by Sentinel No complicated menus, pushbuttons and easy to read LED display make programming and using the DRT-1 quick and easy.

The DRT-1 has been designed to control pumps or other devices that must be activated on a  repeating cycle. The DRT-1 replaces other single-function timers and it offers a extremely wide range of time delays.

The DRT-1 is a 100% DIGITAL recycling timer. Allows the user to set the ON & OFF times in hours, minutes & seconds. No complex menus, single function pushbuttons for ease of use. Photocell allows daytime, nighttime or 24-hour operation. Two receptacles control up to 15-amps of power. Memory backed up with lithium battery. Re-settable circuit breaker built-in.

Cyclestat 4P
With photo sensor. The unit has a button to defeat the photo sensor if desired.

Free shipping for the contiguous 48 states

Total Humidity Controller

Free shipping for the contiguous 48 states

UTC-1 by Sentinel Allows different Day and Night temperatures.

The UTC-1 “Universal Temperature Controller” solves that and other problems while taking temperature control and monitoring to the next level for a variety of set-ups.

Simple to use, 100% DIGITAL temperature controller. Photocell allows separate Day and night temperature settings. Record & recall minimum and maximum temperature levels. Features a Heating or Cooling mode with adjustable dead band and 16 ft remote probe.

Free shipping for the contiguous 48 states

EVC-2 by Sentinel Sentinel has combined digital temperature & humidity controls together in one flexible unit called the EVC-2 / Environmental Controller. It has two additional features which activate a Night Device and a CO2 device. The EVC-2 provides the perfect combination of features

The EVC-2 controls your Temperature & Humidity with DIGITAL accuracy.

• Photocell allows day / night temperature & humidity settings and also provides daytime CO2 operation.
• Remote combination temperature & humidity probe allows the probe to be placed near slant canopy.
• Record & recall minimum and maximum temperature & humidity levels.
• Two temperature modes, Heating & Cooling.
• Separate humidity control to add or remove humidity.
• Adjustable temperature dead band.
• Free shipping for the contiguous 48 states

The EVC-1 Environmental Controller controls all that and more. If you want a simple-to-use and reliable controller without spending hundreds of $, check out the EVC-1.

The EVC-1 provides extreme flexibility in a reliable solid-state environmental controller. Selectable CO2 , Temperature and Humidity modes allow the user to control temperature & humidity separately or together. Built in photocell activates CO2 device during the day. Night device outlet can control an exhaust fan / sulfur burner etc.

Free shipping for the contiguous 48 states

CT/DH3
Use with CO2 equipment. Left outlet turns off when right (exhaust, temp, humidity) turns on.

Free shipping for the contiguous 48 states

CT/DH3P
Same as CT/DH3 except photo cell added to turn off CO2 outlet when no light is present.

Free shipping for the contiguous 48 states

MCC-1
Designed to control atmospheric, lighting, and hydro systems. May need HAR - 1 for some applications.

Free shipping for the contiguous 48 states

Sentinel CO2 Generators Carbon Dioxide / CO2 is critical for all plants. Normal atmospheric air around the world averages about 380 PPM (Parts Per Million). When plants are provided higher levels of carbon dioxide, they can grow faster and larger. It is usually agreed by experts that 1500 PPM is beneficial to plants. Gas burning CO2 generators are the most effective way of producing CO2.

The VCG-27 and VCG-6 are the safest and most advanced CO2 generators available today

• Available in both Propane and Natural Gas

• Variable CO2 output from 3 to 6 cubic foot CO2 / Hr.

• Solid state electronic ignition control module eliminates the open pilot flame

• Tip-over switch shuts off the gas flow in the event the unit falls or tips over

• Unit comes standard with 2 brass burners pre-installed

• The burners are designed to burn clean and produce consistent blue flames

• Dual redundant low-voltage solenoid valves add a second layer of safety

• Comes complete with 12 foot hose and pressure regulator

VCG-6 Propane

Free shipping for the contiguous 48 states.

• Available in both Propane and Natural Gas

• Variable CO2 output from 6 to 27 cubic foot CO2 / Hr.

• Solid state electronic ignition control module eliminates the open pilot flame

• Tip-over switch shuts off the gas flow in the event the unit falls or tips over

• Unit comes standard with 10 brass burners pre-installed

• The burners are designed to burn clean and produce consistent blue flames

• Dual redundant low-voltage solenoid valves add a second layer of safety

• Comes complete with 12 foot hose and pressure regulator

VCG-27 Propane

Free shipping for the contiguous 48 states.

Maintaining a CO2 level between 1000 and 1500 PPM is essential for most plants. CO2 can be increased by either using compressed CO2 or or a CO2 generator. How do you know if you have the necessary level? Eliminate the guesswork.

• One touch calibration of the CO2 sensor

• Simple pushbuttons to enter desired PPM settings and display the current CO2 PPM readings

• Easy to read LED display.

• Can be operated in "Fuzzy Logic" mode for compressed CO2 or On/Off for CO2 generators.

• Optional 12 volt DC adapter allows for coordination with other controllers like the EVC-2

• CO2 receptacle to connect CO2 generator or 120 volt compressed CO2 solenoid / regulator assembly

• The supplied 12 volt power supply connects to any temperature controller so that the CO2 devise will be disabled when the fan is operating

• Remote CO2 and light level sensor can be positioned inside the area and the CPPM-1 outside of the area

• Comes with 15 ft cable

CPPM-1 Monitor Controller

Free shipping for the contiguous 48 states.

$469.99

$529.99

$604.99

The CD-18 model covers up to 3100 cubic feet.

679.99

$749.99