Agrowtek - Grow Control GC-ProXL Climate & Hydro Controller (703104)

Model: 703104

Same great features of GC-Pro, but with more built-in I/O and expansion capability!

Agrowtek's GC-ProXL-E controls up to three climate zones and two nutrient reservoirs. Same great features as GC-Pro, with expanded hardware to handle more sensors and relays. Includes four sensor ports, eight discrete inputs, sixteen outputs for relays and one basic climate sensor. Serial & Ethernet ports for free remote monitoring software. Up to three (3) climate zones, two (2) zones each with hydroponics dosing for up to eight (8) parts plus two (2) pH.

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 industrial grade micro-processor contains all of the user's settings, reads the attached sensors and then turns equipment on or off automatically.

  • Indoor Climate Sensor (temperature, humidity & light irradiance) (CO2 optional)
  • Hydro Sensor Kit (pH, conductivity and water temperature)
  • Wind Sensor Kit (wind speed & direction)
  • Outdoor Temperature Sensor
  • Outdoor Light Sensor
  • Temperature Probes


  • Low-voltage 24VDC operation
  • (16) 24VDC Programmable Outputs (expandable up to 40)
  • (8) 24VDC Programmable Switch/Digital Sensor Inputs
  • (4) Analog Sensor ports (expandable up to 6)
  • (3) Expansion Slots for XD or XA modules
  • Multi-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


  • (703116) Aspirated Precision Electronic Climate Sensor for Air Temperature, Relative Humidity and Light Irradiance
  • GrowControlTM Software and User Manuals on CD
  • 60W 24VDC UL Class II Power Supply 110-240VAC

Control Functions:

  • Lighting Timers (each with secondary delay timer)
  • Light-Flip Control for Flip Box Operation
  • Day/Night Zones/Outputs
  • Cooling/Heating/Limit Thermostats
  • Humdify/Dehumidify Humdistats
  • 24-Hour Timers
  • Standard Cycle-Timers
  • 24-Hour Scheduled Cycle Timers
  • Off-Delay Timers
  • Re-start Delay Timers
  • 24-Hour Cancel Timers
  • Hour Meters
  • CO2 Injection & Ventilation Controls w/Boost Timer
  • Nutrient Dosing with (8) proportional stages each, batch dosing, and 16 set-point scheduling
  • pH Dosing with (1) up and (1) down stage each

Controller Options/Add-ons:

  • (703114) AgrowTouch Color Touch Screen For GC-ProXL
  • (Included) AgrowNet Ethernet Port
  • "XD" +8 output expansion module, or
  • "XA" +2 sensor port expansion module
  • RX1 Single Relay Outlet 15A/120V
  • (703132) RX6 Six Relay Outlet 15A/120V
  • (703138) RD6 Six Dry-Contact Relays 24VDC/120VAC/5A
  • (703142) RD12 Twelve Dry-Contact Relays 24VDC/120VAC/5A
  • (703144) AgrowDose Dosing Pump 46 ml/min
  • (703146) AgrowDose Quad Dosing Pump 46 ml/min

Sensor Options/Add-ons:

  • (703118) CO2 ppm sensor (installed in climate sensor)
  • (703120) Hydro Sensor Kit (pH, Conductivity, Water Temperature)
  • (703116) Aspirated Indoor Climate Sensor SNS-C
  • Outdoor weather sensors (wind, rain, temperature, etc.)
Weight: 10 lb.
Dimensions: 12.5in. × 12.2in. × 6.7in.
List Price: $2,678.00