---
title: "SubSense substrate sensor: water content, EC and temperature"
description: "Grow Sensor root-zone probe for crop steering: water content, EC
  and temperature. Plugs into the Grow Sensor PRO."
url: https://growsensor.co/shop/subsense-substrate-sensor
---

GS-SUB · Substrate probe

# SubSense Substrate Sensor

The Grow Sensor root-zone probe. Water content, EC and temperature in the media, for crop steering.

£199

Pay in 3 interest-free instalments of £66.33 with shop Pay

1

-   60-day money-back guarantee
-   2-year warranty
-   Ships to UK, EU, US, CA, AU, NZ

Technical specification

## Accuracy, published.

Sensing

Water content

0–100 % VWC, ±1.8 % (0–50 %)

Pore water EC

0–20 dS/m, ±5–10 %

Substrate temperature

−40–85 °C, ±0.5 °C

Interface & power

Output

SDI-12 (v1.3)

Cable

3 m, waterproof

Power

3.6–16 V DC, 30 µA quiescent

Protection

Reverse polarity + surge (TVS/ESD)

Media

Substrates

Soil, coco, rockwool, hydro media, mineral

Installation

Buried or container setups

Compatibility

## Works with what you run.

Designed for the Grow Sensor PRO; the readings land in the same app as the canopy channels.

Integrations

-   Connects to the Grow Sensor PRO via the waterproof RJ12 connector block
-   Works with other SDI-12 compatible logging systems

Which one

## Requires a Grow Sensor PRO

 [[Image: GS-01, the Grow Sensor PRO: matte white instrument with a vented base, head-on studio render]  The Grow Sensor PRO The SubSense connects through the RJ12 connector block on the PRO and lands its readings in the same app as the canopy channels. £599](https://growsensor.co/shop/the-grow-sensor-pro-uk)

FAQ

## Before you order.

Both read water content, EC and temperature into the same app. Most rooms take SubSense, the default in the complete system. SOLYX 14 still does the same job, with the edge in extreme high-EC conditions.

Placement depends on pot size and irrigation layout. The installation guide on our FAQ site walks through positioning for each pot size.

One probe connects at a time today. Support for multiple probes per unit is in development.

60-day money-back guarantee and a 2-year warranty, same as every Grow Sensor product.

GS-SUB · Substrate probe

## SubSense Substrate Sensor

60-day money-back guarantee. 2-year warranty. Ships to UK, EU, US, CA, AU, NZ.

£199

## Price by market

| | UK | EU | US |
| --- | --- | --- | --- |
| SubSense Substrate Sensor | £199 | €229 | $259 |