XT-TREE
Wireless Soil Conditions Sensor For Trees
A long-probe sensor designed to be buried down to 150 cm — at the root depth of the trees it monitors. The XT-TREE is the only Tentacles sensor that measures VWC with a single electrode, paired with an optimized probe profile for maximum precision at depth. It reads moisture, temperature and light from the depth that actually matters for tree health.
Single Electrode, Optimized Profile
Surface readings lie — most tree roots live well below the topsoil. The XT-TREE uses a single electrode to measure VWC at the desired root depth, with an optimized probe profile that extracts maximum precision from that one reading. The result: a VWC value that reflects the water actually available to the tree rather than the water evaporating from the surface.
Single-Electrode VWC
The only Tentacles sensor measuring VWC with a single electrode, paired with an optimized probe profile. Volumetric Water Content where the tree drinks, not where the sun dries. Up to 150 cm installation depth.
Substrate Temperature
−20 to +65 °C ±2 %. Root-zone temperature drives phenology and stress — the data needed to plan irrigation and planting.
Ambient Light
0 – 150 000 lux ±5 %. Canopy closure and shade patterns become measurable per tree position.
Hybrid Radio
Sigfox 0G plus LoRaWAN (Helium, Netmore). Data reaches the dashboard from remote plots without on-site gateways.
Long Probe
Designed for permanent installation next to the root ball, with the antenna above ground for reliable transmission.
Self-Learning Calibration
Patent-pending substrate-fingerprinted calibration tunes each sensor to its actual soil.
Where It Fits
Urban Trees
Street trees in pits and tree lawns. A buried sensor survives foot traffic, dogs and street cleaning while reporting the water the tree actually gets.
Parks & Avenues
Tree rows along avenues and in parks where individual water needs vary by species, age and soil profile.
New Plantings
Monitor establishment success over the first critical seasons — quantify when a tree is drinking and when irrigation is failing.
Open Field Orchards
Older orchards and tree nurseries where root depth makes surface readings unreliable.
Technical Details
Body dimensions
66 × 42 × 22 mm (H × W × D, without probes)
Installation depth
Up to 150 cm
Moisture zones
1 depth layer (single electrode, optimized profile)
VWC range
0 – 100 % (min 0.4 % depending on substrate texture and insertion)
Substrate temperature
−20 to +65 °C, ±2 %
Light
0 – 150 000 lux, ±5 %
Sampling rate
Configurable 5 minutes – 4 hours (battery saving)
Measurement configuration
Sampling rate, sensor usage, measurement accumulation
Configuration gate
admin.mytentacles.com
Data access
dashboard.mytentacles.com
Configurable webhook
admin.mytentacles.com
Battery life
Up to 15 years (depends on sampling and message rate)
Antenna
Omni Whip, fixed
Operating temperature
+5 to +65 °C
Use in
Open field
Built For The Long Run
Buried Up To 150 cm
Reach the root zone of mature trees. The probe stays in place; only the antenna pokes above the surface.
Plug & Play
No gateways, no replaceable parts, no cables. Bury it, walk away, check the dashboard.
15-Year Battery
Sealed, fixed battery designed for the long horizons of tree care — install once and forget.
Hybrid Radio
Sigfox 0G plus LoRaWAN (Helium, Netmore). No gateway, no IT, works in remote urban and rural plots.
Sensor Anatomy
Detail 01
Single long-depth probe designed for permanent buried installation at the root zone. The fixed antenna stays above ground for reliable transmission — no cables, no detachable parts.
Detail 02
Optimized probe profile around a single electrode — the only Tentacles sensor that reads VWC this way, tuned for maximum precision at depth.
Available Through Our Partners
Caring For Trees That Outlive The Sensor?
Trees need decades of care; the XT-TREE is built to give you the data without adding to the maintenance load. Talk to our team about coverage and distributor options for your region.