XT-TREE
Inserted directly into the ground. Single-electrode VWC with an optimized probe profile — plus temperature and light at root level.
See technical specsTentacles Refurbished
One sensor.Two lifecycles.
Refurbished sensors — fully tested, all-inclusive, from €0.50 per day. For your garden, balcony or allotment.
Why refurbished
Sensors built so well, one lifecycle isn't enough.
Tentacles sensors are built to last years in the toughest professional greenhouses. When a project ends and a unit comes back to us, the hardware still has another full lifetime of accurate readings in it.
So we give it that lifetime. We take the last bit of usable power out of the sensor, instead of letting it sit in a drawer.
Why a second life
One sensor. Five wins.
Sensor+Connectivity+Web app
All included
Lowest e-waste
Every sensor earns a second lifecycle instead of a drawer.
No water wasted
Water only when the root zone actually asks for it.
Optimal watering
Right depth, right amount, right moment — automatically.
Most beautiful plants
Consistent moisture for healthier, happier greenery.
Highest performing plants
Data-driven growth that turns into visible results.
What you get
Sensor
A fully checked, recalibrated Tentacles sensor with verified remaining battery capacity and new housing seals — ready to insert.
Connectivity
Live readings over LoRaWAN and Sigfox networks — multi-radio coverage included, mobile network included.
Web app
The same Tentacles dashboard the professionals use — open it in your browser, check your plants from anywhere.
All sensor types available
Three types. One subscription.
Every refurbished sensor we offer is one of our three professional lines. Pick the one that fits your garden, balcony or allotment.
3XT-M
For pots and substrate. Three depth zones — top, middle and bottom — in one probe.
See technical specs
4XT-M
Same three depth zones as the 3XT-M, with a fourth electrode for finer resolution. Ideal for thicker slabs and raised beds.
See technical specsTentacles Refurbished is built for home use: gardens, balconies and allotments. For professional deployments we work through our distributors. See professional products
Request your refurbished sensor
We ship within 5 working days across Europe. No commitment — cancel any month.
Request a sensorOr email info@tentaclesiot.com