Growlink TerraLink+ with TrueEC – VWC/EC/Temperature Substrate Sensor

Frequently asked questions

• What does the TerraLink+ with TrueEC measure?

  It measures four things right in the root zone: the volumetric water content of the substrate (VWC), the substrate electrical conductivity (Bulk EC), the pore water EC and the root temperature. With those four values you can irrigate and fertigate with data instead of guesswork.

• How does it help me in day-to-day growing?

  With real-time VWC you adjust irrigation frequency and volume, reducing both water stress and water waste. Bulk EC and pore water EC warn you about salt build-up or excessive flushing, so you can fine-tune your feeding recipe. And root temperature lets you anticipate root suffocation or nutrient lockout.

• Where should I insert the probe for a reliable reading?

  Choose a spot that represents the root volume and avoid the edges of the pot, the area directly under the drippers and zones with immediate drainage. Insert the sensor at the depth where the roots actually work and gently firm the substrate around it so no air pockets are left.

• How does it connect to the control system?

  It has an M8 connector with a 2-metre cable included and plugs straight into the CanopyLink. After that you just check that the channel shows up on your control panel and you can start viewing and automating with those readings.

• Can I use several of them to compare tables or beds?

  Yes, and that is one of its strong points. By comparing the readings from each table or bed you spot the variability between zones and can correct it before visible symptoms appear on the plant. That gives you far greater uniformity across the whole room.

• What should I do at start-up and what maintenance does it need?

  At the start, record the dry and wet reference values for your substrate and crop, and set the VWC, EC and temperature thresholds that will trigger alerts or actions. Maintenance is minimal: keep the connector clean and check now and then that the probe is still firmly seated in the substrate.