Description
Accurate Floor Temperature Sensing for Reliable Heating Control
The ThermoSphere Floor Sensor Probe monitors the temperature of the heated floor so your thermostat knows precisely when to switch the underfloor heating on or off. Fitting an additional floor sensor alongside the heating element is standard best practice on every electric underfloor heating installation, giving more accurate, comfortable and energy-efficient control than relying on an air sensor alone.
Key Benefits
- Gives the thermostat accurate floor-level temperature data for precise control
- Works with all ThermoSphere thermostats
- Not polarity sensitive, making wiring straightforward on site
- IP66 rated for reliable performance embedded in screed or under tile
Applications
Fitted by electricians and underfloor heating installers as standard alongside the heating cable, mesh or foil element on every job — in bathrooms, kitchens, wetrooms and living spaces. Always install an extra floor temperature sensor with underfloor heating applications, run back to the thermostat position alongside the cold tail.
Performance & Features
Rated NTC 10KΩ at 25°C, the probe gives a precise, repeatable resistance reading that ThermoSphere thermostats use to control the floor at your target temperature. With an IP66 protection rating, the sensor head is fully protected against dust and water ingress, so it performs reliably once embedded in screed or bedded under tile for the life of the installation. The cable can be extended up to 50 linear metres if needed to reach the thermostat position.
Compatibility
Works with all ThermoSphere thermostats. Not polarity sensitive, so there's no need to worry about wiring orientation during installation. Available in black or white to suit your preference, and in 3m or 10m lengths to reach the thermostat position on smaller or larger rooms.
All electrical work should be carried out by a suitably qualified electrician in accordance with the relevant local safety regulations and standards. ThermoSphere is backed by Millcot's trade support — buy with confidence from a specialist UK underfloor heating and tiling supplier.
Key Features
- NTC 10KΩ @ 25°C sensor rating
- Works with all ThermoSphere thermostats
- Not polarity sensitive
- IP66 rated sensor head
- Max cable extension of 50 linear metres
- Available in 3m and 10m lengths
Technical Specifications
- Rating: NTC 10KΩ @ 25°C
- Colour: Black or white
- Polarity: Not polarity sensitive
- Max cable extension: 50 linear metres
- Protection rating: IP66
- Sensor size: W 29 x H 7 x D 6mm
- Length: 3m (FSPB-10-03) or 10m (FSPB-10-10)
- Country of origin: China
- Warranty: 3 years
What's Included
Each unit supplied is one ThermoSphere floor sensor probe in your selected length (3m or 10m), ready to be fitted alongside the heating element and wired back to a ThermoSphere thermostat.
Downloads
FAQs
Do I need a floor sensor with my underfloor heating?
Yes, it's always recommended to install an extra floor temperature sensor alongside your underfloor heating element for accurate, reliable thermostat control.
Which length should I choose?
Choose 3m for smaller rooms or where the thermostat is close by, or 10m for larger rooms or longer cable runs to the thermostat position.
Does the sensor work with any thermostat?
It's designed to work with all ThermoSphere thermostats.
Does it matter which way round I wire it?
No, the sensor is not polarity sensitive, so it can be wired either way round.
Can the cable be extended if it's not quite long enough?
Yes, the cable can be extended by up to 50 linear metres in total if needed.
Is it safe to embed in screed or under tile?
Yes, the sensor head is IP66 rated, giving full protection against dust and water once embedded.