TrolMaster WN-9 Soil Moisture, EC & Temp 3-in-1 Substrate Sensor Node

Add Root Zone Readings From Another Spot - 3-in-1 Sensor

A single probe can mislead you when water channels or a dry pocket forms in the medium. The WN-9 adds a measuring point to a WCS-9 sensor display, so you can read volumetric water content, EC and temperature from more than one location. The display can then work from a broader picture of the substrate.

This is a sold-each add-on node. It suits growers who already run a WCS-9 display and want more coverage across a bench, bed or set of containers, whether in a home room or a larger indoor operation.

Key Features & Benefits

• Three readings in one probe — water content, EC and temperature from the same node.
• Daisy chain connection — up to 4 nodes link to one display, which limits cable clutter.
• Factory pre-calibrated for Rockwool — this medium needs no initial calibration.
• Cable included — an ECS-7 12 ft daisy chain control cable ships in the box.
• Low power draw — runs on 12V at up to 0.1A.

Who Should Use TrolMaster WN-9 Substrate Sensor Node

Choose the WN-9 if you already own a WCS-9 display and want readings from more spots in the medium. It suits growers who base irrigation decisions on measured substrate conditions rather than guesswork.

About TrolMaster WN-9 Substrate Sensor Node

The WN-9 is a TrolMaster substrate sensor node that measures volumetric water content (0-100%), EC (0-30 mS/cm) and temperature (0-50°C / 32-122°F). It ships with one WN-9 node and one ECS-7 12 ft cable. The unit weighs 0.66 lb when shipped.

Frequently Asked Questions

Q: Does the WN-9 work on its own?
A: It is an add-on node for the WCS-9 sensor display. You need the display to read and log its data.

Q: How many nodes can I connect?
A: Up to 4 nodes can connect to one display. You link them in a daisy chain.

Q: What does EC mean?
A: EC is electrical conductivity, a measure of the dissolved salts in the medium. This node reads EC from 0 to 30 mS/cm.

Q: Does it need calibration?
A: It comes factory pre-calibrated for Rockwool. For other media, follow the manufacturer manual.

Q: What operating conditions can it handle?
A: It operates from 32 to 122°F (0 to 50°C) at up to 90% relative humidity.

Q: Is a cable included?
A: Yes. The box includes one ECS-7 12 ft daisy chain control cable.