
X-Sense STH51
The STH51 sensors add precise temperature and humidity monitoring to an X-Sense SBS50 base station. Data is stored free of charge in the cloud and can be exported.
- Pack
- 3 thermo-hygrometers
- Requires
- SBS50 base station
- Accuracy
- ±0.2 °C, ±2% RH
- Data
- Free cloud storage
- ✓3 thermo-hygrometers
- ✓±0.2 °C and ±2% RH accuracy
- ✓Free cloud storage and export
- ✓Alerts outside your preset range
- ✓Range up to 500 m
Day to day
- 01A high-precision sensor gives ±0.2 °C accuracy from -20 to 60 °C and ±2% RH from 0 to 100% RH.
- 02An open-air range of up to 500 m keeps the signal stable in large or multi-level homes.
- 03Cloud storage is free, and you can export the past year’s data with no subscription.
- 04If the network drops, recent data is restored once it is back.
- 05Push alerts and the base station alarm warn you when readings leave your preset range.
- 06The app gives 24/7 monitoring with graphs of minimum, maximum and average values, in °C or °F.
Real-life uses
Several rooms
Follow the bedroom, nursery and living room from one app.
Second homes
Check the temperature remotely during cold spells.
Collections and storage
Keep records of conditions where books, instruments or wine are kept.
Right for you if…
Owners of an SBS50 base station who want accurate readings and a full year of exportable data.
Check before you buy
The SBS50 base station is required and is not included in this pack.
Specifications
- Model
- STH51
- Temperature accuracy
- ±0.2 °C (-20 to 60 °C)
- Humidity accuracy
- ±2% RH (0–100%)
- Range
- Up to 500 m in open air
- Mounting
- Wall mount
- Size
- 36 × 94 mm
- Data
- Free cloud storage, one-year export
- Connection
- Via SBS50 base station
- Quantity
- 3 sensors
Frequently asked questions
Do I need a base station?+
Yes. The SBS50 base station is required.
Is there a subscription for the data?+
No. Cloud storage is free and you can export the past year’s data without a subscription fee.
What if my internet goes down?+
Recent data is restored once the network connection is back.
X-Sense STH51
Promotions and delivery times change often: today’s deal in one click.
In the same family

1 water leak detector
X-Sense SWS0A
The SWS0A spots water just 0.3 mm deep as well as drips from above, thanks to probes on both sides. At only 17 mm thick, it slips into tight spaces under appliances.
→
3 water leak detectors
X-Sense SWS51
The SWS51 sensors add leak detection to an X-Sense SBS50 base station, with three detectors in the pack. When water is found, both the sensor and the base sound and your phone gets a push alert.
→
3 sensors + 1 base station
X-Sense SWS54
The SWS54 kit contains everything you need to start watching for leaks: three sensors and a base station. Each IP66 sensor detects just 0.3 mm of water and alerts your phone.
→
3 water leak alarms
X-Sense SWS0B
The SWS0B detects leaks and warns you when the temperature drops below 4 °C, giving you time to act before pipes freeze. It connects straight to your Wi-Fi, with no base station needed.
→