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TrolMaster WCS-3 Water Content Sensor 3 | Advanced VWC% Substrate Moisture Monitoring

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TrolMaster WCS-3 Water Content Sensor 3 – Advanced VWC% Substrate Moisture Monitoring

Product Overview

Achieve professional-level precision in your irrigation strategy with the TrolMaster WCS-3. This 3-prong Volumetric Water Content (VWC) sensor is the essential tool for growers practicing crop steering, providing instant, accurate moisture percentage readings from within your medium. Whether you are growing in coco coir, soil, or rockwool, the WCS-3 gives you the real-time data needed to optimize "dry-backs" and maximize plant vitality.

Featuring a unique "tap-to-wake" LCD display, the WCS-3 allows for quick manual spot-checks directly at the plant, while simultaneously feeding data back to your central TrolMaster interface for automated control.

Universal Controller Compatibility

The WCS-3 is designed to scale with your operation, supporting a wide range of TrolMaster ecosystems:

  • Aqua-X Pro (NFS-2) & Hydro-X Pro (HCS-2): Connect up to 50 sensors for massive multi-zone monitoring.

  • Aqua-X Plus (NFS-3): Supports up to 20 sensors.

  • Aqua-X (NFS-1): Supports up to 8 sensors.

  • Tent-X (TCS-1): Supports 1 sensor for localized tent control.

Key Features

  • 3-Prong Accuracy: Measures a larger volume of substrate for a more representative VWC% reading.

  • Live LCD Feedback: Built-in screen activates when the sensor is shaken or disturbed, showing VWC% without needing to check your controller display or phone app.

  • Substrate Versatility: Calibrated for high performance in rockwool, coco, and various soil blends.

  • Daisy-Chain Ready: Easily expand your system using TrolMaster T-Splitters.


Technical Specifications

Feature Details
Sensor Type 3-Prong Volumetric Water Content (VWC)
Readout Range 0% to 100% Moisture
Communication M12 Digital Link
Input Voltage 12V DC
Working Environment Temperature 0-50°C, Humidity ≤90%

Pro Tips: Cleaning & Calibration

Cleaning Instructions

To ensure long-term accuracy and prevent salt build-up:

  • Wipe After Use: Regularly wipe the stainless steel prongs with a damp, soft cloth to remove nutrient salts or media residue.

  • Deep Clean: If you notice inconsistent readings, clean the prongs with isopropyl alcohol (70%) to remove stubborn biofilms. Never use abrasive scrubbers (like steel wool) as this can damage the sensor coating.

Calibration & Placement Tips

  • Substrate Consistency: For the most accurate VWC%, ensure the medium is packed consistently around the prongs with no air gaps.

  • Proper Depth: Fully insert all three prongs into the medium. In rockwool, insert horizontally; in pots, insert at 50mm/2" from the bottom the block/container.

  • Air Calibration: Before a new run, check the sensor in open air; it should read 0%. If it doesn't, use the "Calibration" menu on your Aqua-X or Hydro-X controller to reset the baseline.

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Precision Moisture Monitoring for Smarter Irrigation

The TrolMaster WCS-3 Water Content Sensor is designed to accurately measure the volumetric water content (VWC) of your growing media, helping growers make informed irrigation decisions. Compatible with the Aqua-X, Aqua-X Pro, Aqua-X Plus, Hydro-X Pro and Tent-X control systems, the WCS-3 provides reliable real-time moisture readings for soil, coco coir and rockwool installations.

Featuring a slim three-prong sensor, integrated LCD display and support for multiple sensor installations, the WCS-3 makes crop steering and precision irrigation easier than ever. Whether you're managing a small grow room or a commercial facility, you'll gain the confidence to irrigate only when your plants need it.

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Frequently Asked Questions

The WCS-3 measures the volumetric water content (VWC) of your growing medium, providing accurate moisture percentage readings in real time.

The WCS-3 works with the Aqua-X (NFS-1), Aqua-X Pro (NFS-2), Aqua-X Plus (NFS-3), Hydro-X Pro (HCS-2) and Tent-X (TCS-1) control systems.

The sensor is designed for coco coir, soil and rockwool, making it suitable for most professional growing environments.

Yes. Multiple sensors can be connected depending on your controller. The Aqua-X Pro and Hydro-X Pro support up to 50 sensors, Aqua-X Plus supports up to 20, Aqua-X supports up to 8, while Tent-X supports one sensor.

Yes. The WCS-3 features a built-in LCD display that shows the current moisture reading when the sensor is moved or tapped.

Yes. When connected to a compatible TrolMaster controller and the TM+ Pro app, you can monitor live readings, historical graphs and receive alerts if moisture levels exceed your chosen limits.

Accurate moisture monitoring helps prevent both overwatering and underwatering, improving irrigation efficiency and supporting healthier plant growth.

Yes. The WCS-3 is designed for both hobby growers and commercial installations, with support for multiple sensors across large irrigation systems.