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Agrowtek GrowControl GC-Pro Controller

Item #: GC-PRO

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Agrowtek GC-PRO Controller

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Introducting Agrowteks' Complete Cultivation Control System! The GrowControl GC-Pro control system is designed from the ground-up to be the most flexible, advanced control solution that modern, demanding growers can depend on for reliability and ease of operation. Manage, monitor, and control all aspects of your climate equipment and hydroponics systems including automatic dosing. A built-in micro-processor contains all of the user's settings, reads the attached sensors and then turns equipment on or off automatically.

Dual-Zone Control
The GC-Pro can operate TWO independent zones from one controller. Connect up to two climate sensors, two hydro sensors, and two auxiliary sensors to monitor and control two environments.

The GC-Pro is built with Agrowtek's exclusive Flexnology which allows the grower to tailor the controller's functions precisely to their operation's requirements. A large 'tool box' of control functions is provided for the user to select from and assign to outputs as required by the equipment to be controlled.

Complete Climate Control
Fully automate up to two zones with independent controls for cooling, heating, humidification, dehumidification, CO2 injection and ventilation with boost timing, lighting timers and light flip box controls, vent/shade/curtain position controls for greenhouses. Featuring a large array of different timers including precision repeat cycle timers (in minutes or seconds,) 24-hour timers, 24-hour cancellation timers, combination 24-hour cycle timers, off-delay timers, re-start delay timers and hour meters.

Fully Automated Hydroponics Dosing
GrowControl systems take the manual work out of maintaining a hydroponics system. Fully automate and schedule reservoir changes, nutrient dosing and pH control. Mix volumetric batches or add Agrowtek's hydro sensor kit to monitor and maintain pH, EC and temperature automatically.

AgrowTouch Touch Screen
An industrial strength touch screen interface is available which allows fast and easy access to all settings in the controller including manual over-rides of all equipment, adjustment of all settings, graphical display and history of all sensor readings, alarm history display and more. On-screen help provides the operator with quick tips and describes each function of the controller. For economical or starter applications, the GC-Pro can be adjusted and monitored with the free PC software.

RX / CX / RD Relays
The controller's low-voltage 24Vdc outputs are wired to Agrowtek's RX, CX and RD series relays to control equipment power. Mix and match relay models to suite your environment and equipment control requirements. The GC-Pro can also be direct wired to existing or custom electrical relays panels.


  • Low-voltage 24VDC operation
  • (12) 24VDC Programmable Outputs (expandable up to 20)
  • (4) 24VDC Programmable Switch/Digital Sensor Inputs
  • (8) Programmable Analog Sensor Channels (expandable up to 16)
  • Dual Zone Control
  • Powder-coated sheet metal enclosure (Wisconsin)
  • Industrial components for long life/reliability (USA)
  • Designed & manufactured in the U.S.A.!
  • Full 3-Year Factory Direct Warranty
  • Lamp hot-fire prevention
  • Output delay sequencing to prevent load spikes
  • Alarms and alerts
  • Trending and data logging
  • Remote access and more!

Included with Unit:

  • Aspirated Precision Electronic Climate Sensor with 15ft cable
    (Air Temperature, Relative Humidity & Light Irradiance)
  • Serial PC Communication Port
  • GrowControlTM Software and User Manuals on CD
  • 40W 24VDC UL Class II Power Supply 110-240VAC


  • (2) Lighting Timers (each with secondary delay timer)
  • (1) Light-Flip Control for Flip Box Operation
  • (4) Heating Thermostats
  • (6) Cooling Thermostats
  • (4) Humdify Humdistats
  • (4) Dehumidify Humidistats
  • (2) Humidistat Limit-stats
  • (4) Thermostat Limit-stats
  • (2) Day/Night Zones/Outputs
  • (4) 24-Hour Timers
  • (4) Standard Cycle-Timers
  • (4) 24-Hour Scheduled Cycle Timers
  • (4) Off-Delay Timers
  • (4) Re-start Delay Timers
  • (4) 24-Hour Cancel Timers
  • (4) Vent/Shade/Curtian Proportional (VSC) Controls
  • (2) Hour Meters
  • (2) CO2 Injection & Ventilation Controls w/Boost Timer
  • (2) Nutrient Dosing zones with (8) proportional stages each, batch dosing, and 16 set-point scheduling
  • (2) pH Dosing zones with (1) up and (1) down stage each
  • (2) Auxiliary Input Controls (Programmable to any 4-20mA type sensor)

Available Upgrades:

  • AgrowTouchTM 4" Color Touch Screen
  • Ethernet Communication Port
  • CO2 ppm option for Climate Sensor
  • Additional Sensors (hydroponics, weather, climate, etc.)
  • Weather-Proof Poly Enclosure
  • Serial to USB Converter cable


Outlets Twelve (12) 24VDC outputs
Has Photocell No
Brand Agrowtek
Weight (lb.) 5
Length (in.) 16
Width (in.) 8
Height (in.) 14
Warranty Yes
Free Shipping Yes

Agrowtek GrowControl GC-Pro Controller Questions & Answers

Do I need a computer to use GrowControlTM?
No! GrowControlTM can be operated via the touch-panel interface (optional.)

How do I connect GrowControl to my PC?
GrowControlTM is equipped standard with a serial port (rs-232.) The optional Ethernet port allows the controller to be connected to your local network and accessed via an IP address. Multiple PC's can access a controller connected via Ethernet.

Can I connect to a USB port?
Yes, you can connect the controller to your PC's USB 1.1/2.0 port with a "RS-232 to USB converter." Available with the control system or purchase your own. These converters require software drivers which emulate a serial COM port. Select the correct COM port in the GrowControl software.

What is the maximum distance to my PC?
The maximum recommended distance for serial communication is 50 feet. (50 foot extensions cables are available from Agrowtek.) The standard limit for Ethernet devices is 300 ft (100m.)

Can I send E-mail alerts?
Yes, GrowControlTM software allows you to send email alerts for a variety of avderse conditions.

Do I need Windows®?
Windows® is required to operate the GrowControlTM software. Agrowtek's software has been tested and designed to operate on Windows® XP, Windows® Vista, and Windows® 7 (32/64bit.) You must have the Microsoft® .Net environment installed.

Can I access the GrowControl software from the Internet?
Yes. If your controller is connected via Ethernet, you can map your ports to access the controller via the internet. If your controller is connected via the serial port, you can use a remote connection software such as Windows® remote desktop, PCAnywhere, Remote Administrator, etc. to access the software running on the connected computer.

How does the data logging feature work?
The touch-screen provides 24-hour trend graphs on-screen for each sensor reading. To log data to a file, a PC is required to operate to GrowControl software. Sensor readings can be tracked for up to 24-hours on the live trending chart and you can store up to your hard-drive's capacity by logging to .CSV (comma separated value) files. CSV files can be viewed and plotted in any spreadsheet application including Excel® and OpenOffice.org. Log files can be added to continuously, or a new file can be created daily at a specified time.

What if my computer crashes?
GrowControlTM will continue to operate according to the settings you provided it even if your computer crashes, gets shut down or is otherwise interrupted. The control system operates completely independently of your PC.

What if the power goes out?
If the power is interrupted to the controller, GrowControlTM will re-start and continue operating where it left off when the power comes back on. An internal backup maintains the program settings and continues to run the real-time clock to maintain the proper time. Built-in hot-fire prevention will keep lights from being damaged due to hot-fire.

How are sensors connected and what are channels?
There are two sensor ports available with 4 channels each. A climate sensor uses 3 channels for temperature, humidity and light and 4 channels if CO2 is added. The hydroponic kit only uses 3 of the 4 channels for pH, EC and temperature.

What is the maximum sensor cable length?
GC-Pro sensor cables can be extended up to 2000 feet from the controller. Inexpensive 15, 25, 50 & 100 foot extension cables are available from Agrowtek. Sensor signals are immune to noise or loss over vast distances.

Can I change the display units?
The controller can be configured to operate with temperature units of °C/°F, conductivity units of mS/cm2, uS/cm2, TDS ppm (500/640/700 factor,) and the aux inputs can even be custom scaled to any industrial 4-20mA sensor to monitor and control nearly any parameter!

How do I control equipment?
The GC-Pro comes standard with twelve (12) 24VDC outputs. These outputs can be connected to Agrowtek's RX/CX series of relays and contactors for safe, reliable control of line-voltage loads. Alternately, relays can be purchased to be wired directly into your existing electrical infrastructure.

Do I need an extra power supply?
The GC-Pro has provisions for an alternate 24VDC power supply to operate the output devices. This is necessary when the controller is wired to devices other than Agrowtek's RX/CX relays or AgrowDoseTM dosing pumps.

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