Soil Moisture Sensors
Wireless sensors that measure substrate and soil moisture at multiple depths — no gateway, no cables, no maintenance.
Tentacles IoT builds wireless soil and substrate moisture sensors for growers, landscapers, nursery operators and irrigation specialists. One sensor, multiple VWC zones, up to 15 years of battery life — data that lands directly in your dashboard or platform of choice.
A soil moisture sensor measures the volumetric water content (VWC) in the root zone — the percentage of soil or substrate that actually holds water. Instead of watering on instinct or a fixed schedule, the sensor gives you real-time data on when plants truly need water.
Our sensors work on capacitive measurement principles: they detect changes in the dielectric constant of the medium and convert those into accurate moisture percentages. No moving parts, no per-season calibration, and no external gateway — the sensor communicates directly via Sigfox 0G or LoRaWAN (Helium, Netmore).
The three models — 3XT-M, 4XT-M and XT-TREE — cover virtually every application: from potted plants and substrate cultivation to trees in urban greenery. One measurement principle, three form factors, tuned for the depth and resolution your crop demands.
Compare Our Three Soil Moisture Sensors
Wireless, up to 15-year battery life and multi-depth VWC measurement. Choose the model that fits your substrate, pot size or root depth.
Wireless Sensor
3XT-M
Three-zone substrate sensor for pots, slabs and open field — the workhorse for most crops.
- VWC zones
- 3
- Pot size
- 17+
- Battery life
- Up to 15 years
Wireless Sensor
4XT-M
Four-electrode design for finer VWC resolution in the same three zones — for high-value crops.
- VWC zones
- 3 (high-res)
- Pot size
- 8.5 – 17
- Battery life
- Up to 15 years
Wireless Sensor
XT-TREE
Single deep probe up to 150 cm — designed for permanent installation at tree root depth.
- VWC zones
- 1 (at root depth)
- Depth
- Up to 150 cm
- Battery life
- Up to 15 years
Applications By Industry
Every industry has different requirements for moisture sensing. See how our sensors are used in horticulture, public green space and automated irrigation.
Horticulture & Substrate Cultivation
Continuous VWC data per batch, linked to your cultivation log. Ideal for potted plants, cut flowers, vegetables and small-scale trials.
Learn MorePublic Green Space & Urban Planting
Manage flower towers, planters and tree pits by moisture instead of schedule. Less water, healthier plants, provable data.
Learn MoreSmart Irrigation
Connect our sensors to irrigation controllers and trigger watering on demand. For gardens, parks, sports fields and commercial landscape.
Learn More