Global Air Supplies Intelligent VPD Humidity Controller

Let VPD do the humidity calculations for you

The Global Air Supplies Intelligent VPD Humidity Controller (IHC) automates humidity management by monitoring temperature, humidity and light cycles, then calculating and holding the ideal Vapour Pressure Deficit (VPD) for your plants. Humidity imbalance is one of the most common causes of grow-room stress: dry air makes plants transpire too fast and pull in excess nutrients, risking leaf burn, while overly humid air slows transpiration, limits nutrient uptake and raises the risk of mould in flower. By working from air and leaf temperature, the controller keeps the canopy transpiring at the right rate so roots draw nutrients correctly throughout veg and bloom.

Key Benefits

• Automatically maintains optimal VPD for healthy plant development
• Controls humidifiers based on real-time temperature and humidity
• Built-in sensor probe for temperature, humidity and light
• Separate day and night humidity settings to match the light cycle
• Multiple control modes including VPD and relative humidity
• Low-water warning display when the connected humidifier runs dry
• Suitable for hydroponics, coco and soil indoor growing systems

How to Use

1. Connect your humidifier to the controller's power outlet.
2. Place the sensor probe at canopy height inside the grow tent or room.
3. Power on and select the control mode (Relative Humidity or VPD).
4. For VPD control, measure leaf temperature with an infrared thermometer and enter the difference between leaf and air temperature.
5. Set your target humidity or growth-stage parameters.
6. The controller then activates the humidifier automatically whenever it is needed to hold the target.