TrolMaster - Humidistat Station (HS-1)

The TrolMaster HS-1 Humidistat Station is designed to control commercial dehumidifiers within a Hydro-X environmental control system. In indoor growing environments, maintaining stable humidity levels is essential for protecting plant health, preventing mould and supporting strong vegetative growth and flowering. The HS-1 allows growers to connect compatible dehumidifiers that support external humidistat control, enabling precise humidity management in grow tents and grow rooms.

Unlike standard relay modules that switch high-power equipment directly, the HS-1 operates using a low-voltage control signal. This allows it to communicate with commercial dehumidifiers without handling the high electrical load typically associated with these units. The result is a safer and more reliable way to automate humidity control in hydroponics, coco or soil-based indoor growing systems.

Key Benefits

• Controls commercial dehumidifiers using low-voltage humidistat connections
• Seamless integration with the TrolMaster Hydro-X environmental control system
• Helps maintain stable humidity levels in grow tents and grow rooms
• LCD display for clear operation and easy setup
• Plug & play installation with RJ12 connectivity
• Supports firmware updates via MicroSD card
• Reduces the need to switch high-amp dehumidifier loads directly

How It Solves Grow Problems

High humidity is one of the biggest risks during indoor growing, particularly during the flowering and bloom stage. Excess moisture in the grow room can lead to mould, bud rot and poor bud density, reducing overall yield.

The HS-1 allows growers to automate commercial dehumidifiers using the Hydro-X controller. By maintaining stable humidity levels throughout the grow cycle, plants can focus energy on nutrient uptake, root development and healthy growth instead of fighting environmental stress.

This is particularly valuable in larger grow rooms where high-intensity lighting and dense plant canopies produce significant humidity. With the HS-1 managing dehumidifier operation, growers can maintain a stable environment that supports healthier plants and stronger yields.

Kit Contents

• 1 × HS-1 Humidistat Station
• 1 × 16 ft RJ12 cable
• 1 × 4 ft RJ12 cable
• 1 × RJ12 T-splitter

How to Use

1. Connect the HS-1 to the TrolMaster Hydro-X controller using one of the included RJ12 cables.

2. Assign the module address within the Hydro-X system settings.

3. Use low-voltage control wiring to connect the HS-1 to the dehumidifier’s external humidistat terminals.

4. Ensure the connected dehumidifier supports external humidistat control.

5. Configure the desired humidity range within the Hydro-X controller.

6. The Hydro-X system will automatically activate the dehumidifier when humidity levels exceed the programmed set point.

Technical Specifications

• Output Voltage: 24V
• Maximum Current: 1A
• Operating Temperature: 32–122°F
• Maximum Humidity: ≤90%
• Dimensions: 160mm (L) × 86mm (W) × 86mm (H)