Free UK delivery over £100
Price match guarantee
Discreet packaging on every order
Expert grower support, whenever you need it




Environmental Controllers

6 products

  • DimLux / OptiClimate Maxi Controller EVO Fan Controller & Aux Box

    A fan/pump controller and box combination used to control the pump on/off function and fan speed of an Opti...

    Out of stock

    A fan/pump controller and box combination used to control the pump on/off function and fan speed of an OptiClimate chiller.Feature HighlightsDual-Sensor Input — Receives signals from a water temperature sensor and a start-sensor detecting compressor status.Automatic Pump Control — The start-sensor controls the pump directly.Automatic Fan Speed Control — The temperature sensor controls the chiller fan speed based on water temperature.SpecsSensor InputsWater temperature sensor + compressor start-sensorCompatibilityDesigned for use with the DimLux Maxi Controller EVO and OptiClimate chiller systems. Without this module, the fan and pump run continuously at 100%.

    Out of stock

    £638.00

  • Dimlux 15-Amp Fan Aux Box (3 Socket)

    A 3-socket auxiliary box connecting to the DimLux Maxi Controller EVO 1.1's Aux/Fan output, letting you run...

    Out of stock

    A 3-socket auxiliary box connecting to the DimLux Maxi Controller EVO 1.1's Aux/Fan output, letting you run a heater, humidifier, dehumidifier, or fan directly from your controller.Feature HighlightsElectronic, Quiet Fan Control — No humming, unlike standard fan control methods.Individually Adjustable Settings — Separate day/night temperature and RH settings.SmartLogic Algorithm — Ensures the actual temperature stays aligned with your set temperature.SpecsOutputs3, all rated 15ACompatibilityConnects to the DimLux Maxi Controller EVO 1.1's dedicated Aux/Fan output.

    Out of stock

    £428.00

  • DimLux Maxi Controller

    A modular control system for the DimLux lighting system, plus fan and heating control, monitoring CO2, vapo...

    Out of stock

    A modular control system for the DimLux lighting system, plus fan and heating control, monitoring CO2, vapor pressure deficit (VPD), and plant temperature depending on which sensors are attached.Feature HighlightsControls up to 160 Fixtures — Manages DimLux Expert fixtures or Xtreme ballasts at scale.Silent Built-In Timer — Switches lighting on/off silently, with variable regulation to your desired output level.Fully Modular — Extend with AUX Box, FAN/AUX Box, CO2 sensor, CO2 Gas Protect sensor, plant temperature camera, RH sensor, and temperature sensor.SpecsMax Fixtures ControlledUp to 160 (DimLux Expert or Xtreme ballasts)CompatibilityModular design lets you build out monitoring and control capability over time — sensors and boxes sold separately.

    Out of stock

    £250.00

  • Trolmaster Hydro-X Plus Controller(HCS-3)

    A professional-grade, single-zone environmental control system with an 800x480 7" LED display, capable of c...

    Out of stock

    A professional-grade, single-zone environmental control system with an 800x480 7" LED display, capable of controlling an unlimited number of lights alongside temperature, humidity, and CO2 devices.Feature HighlightsExpanded Device Capacity — Controls 8 temperature devices, 8 humidity devices, 4 CO2 devices, and 12 programmable timer devices with up to 50 schedules.Multi-Stage Environmental Control — Multiple control modules let you create separate temperature/humidity "stages" for a more stable environment.Advanced Lighting Functions — DLI control, Spectrum Control, Group Control, and Cloud Control, plus Sunrise/Sunset simulation and overheat protection.Smartphone Alerts — Get notified instantly if a problem is detected; connect up to 10 smoke detectors and 10 water-leak detectors for fire/leak alerts.SpecsDisplay7" touchscreen, 800x480Temperature DevicesUp to 8Humidity DevicesUp to 8CO2 DevicesUp to 4Timer DevicesUp to 12 (50 schedules)CompatibilityComes with an MBS-PRO 4-in-1 sensor; the optional MBS-PAR light sensor can be added for automatic light-intensity adjustment. Free smartphone app for remote control.

    Out of stock

    £1,700.00

  • Trolmaster Hydro-X Environment Control System (HCS-1)

    A professional-grade, single-zone environmental control system, fully customizable and modularly designed f...

    Out of stock

    A professional-grade, single-zone environmental control system, fully customizable and modularly designed for simple installation and easy expansion.Feature HighlightsBroad Equipment Control — Controls most grow light brands, HVAC systems, mini-split air conditioners, commercial dehumidifiers and humidifiers, plus CO2 generators or regulators.Fully Customizable — Modular design lets you build your setup exactly as needed.Free Smartphone App — Access all settings and alerts remotely, anytime.SpecsDesignModular, single-zoneCompatibilityComes complete with an MBS-TH 3-in-1 sensor; additional modules connect via RJ12 daisy-chain to expand system capability.

    Out of stock

    £310.00

  • Trolmaster Tent-X System Main Controller(TCS-1)

    A state-of-the-art, modularly designed environmental and irrigation control system built specifically for s...

    Out of stock

    A state-of-the-art, modularly designed environmental and irrigation control system built specifically for single-zone grow tents, effectively controlling both environmental parameters and irrigation from one unit.Feature HighlightsCombined Climate + Irrigation Control — Unites climate control and irrigation devices into one compact hydroponic control system.Daisy-Chain Sensor Support — Chain the included MBS-TH sensor with CO2 (MBS-S8), quantum light (MBS-PAR), smoke, and water detectors into the SENSOR port.Expandable Device Capacity — Supports up to four DS-type plug-in control modules for environment and irrigation devices.Data Logging — Tracks system activity for review and troubleshooting.SpecsDesignModular, single-zone grow tentPlug-In Module SupportUp to 4 DS-type modulesCompatibilityComes with the MBS-TH 3-in-1 sensor; supports an AMP-3 sensor board with WCS-1/2 water content sensors or a WD-1 water detector.

    Out of stock

    £140.00

Environmental Controllers

Automate and monitor your entire grow room with our range of environmental controllers from Trolmaster, DimLux, and Gavita. From single-zone systems handling lighting and climate control to advanced multi-zone setups with smartphone alerts, our controller range gives you precise control over temperature, humidity, CO2, and lighting from one central system.

What an environmental controller actually does

An environmental controller acts as the "brain" of your grow room, linking together sensors and devices — lights, fans, humidifiers, heaters — so they respond automatically to real conditions rather than fixed timers alone. Instead of manually adjusting equipment throughout the day, a controller like the Trolmaster Hydro-X or DimLux Maxi Controller continuously monitors temperature, humidity, and CO2, making small adjustments to keep conditions stable around the clock.

Single-zone vs multi-zone systems

Entry-level controllers (like the Trolmaster HCS-1) manage one grow space effectively. Higher-tier systems (like the Hydro-X Plus HCS-3) support multiple lighting control channels and expanded device capacity, useful if you're running separate veg and flower rooms, or multiple tents needing independent schedules from a single controller.

Modular expansion

Most of our controllers are modular — start with the base unit and included sensor, then add specific modules (temperature probes, humidity sensors, CO2 monitors, camera modules) as your setup grows. This means you're not locked into buying every feature upfront; you can expand precisely as your needs change.

Remote monitoring and alerts

Nearly all our current controllers pair with a free smartphone app, letting you check conditions and receive alerts remotely — genuinely useful for catching a developing problem (like a failed fan or rising temperature) before it damages a crop, even when you're not physically in the grow room.

FAQ

Do I need a controller, or can I manage everything with separate timers?
Separate timers work for very basic setups, but a controller becomes valuable once you're managing multiple interdependent factors (temperature, humidity, CO2, lighting) that benefit from responding to each other automatically rather than running on fixed schedules.

Can I add sensors later, or do I need everything at once?
Most of our controller systems are designed for gradual expansion — start with the base controller and included sensor, then add specific modules as needed.

Will a controller work with lights I already own?
Compatibility depends on your existing lighting's control protocol — check the specific controller and lighting adapter compatibility (many support a wide range of third-party HID and LED brands via dedicated adapters).

Login

Forgot your password?

Don't have an account yet?
Create account