Room temperature sensor FT/FTF

  • Extremely flat with a height of 12.5 mm
  • No cables required (operation via photovoltaic cell or battery)
  • Flexible location-independent use anywhere in buildings


Determination of the actual ambient temperature and adjustment of the reference value for the room temperature.


The room temperature sensor FT transmits the actual ambient temperature as well as the reference room temperature via the integrated EnOcean wireless module to the single room temperature controller CosiTherm® Wireless or to the AFRISOhome gateway. The room temperature sensor FTF also transmits the current humidity value. The reference value for the room temperature is adjusted by means of the integrated rotary knob. The actual temperature in rooms with an underfloor heating system is compared to the reference temperature on an ongoing basis. If there is a difference, the single room temperature controller CosiTherm® Wireless adapts volume flows of the heating/cooling water via the thermal actuators of the manifold system. The energy required to send reference temperature and actual temperature values is generated by means of an integrated photovoltaic cell; it is also possible to use a standard battery. The AFRISOhome gateway transmits alarm messages and changes in temperature and/or humidity via WLAN, LAN and GSM to the person in charge (for example, to the owner, the facility manager, the janitor or other configured contacts); the message includes information on which room temperature sensor has signalled the change. The AFRISOhome gateway in conjunction with additional AFRISO products with EnOcean wireless technology allows the user to configure a whole range of fully customisable, extensible applications.

Technical specifications

Operating temperature range
Ambient: -20/+60 °C
Storage: -20/+60 °C

Temperature adjustment range
8/30 °C

Temperature measurement
0/40 °C
Accuracy: ± 1 K

Humidity measurement
With room temperature sensor FTF only
Room humidity: 0/100 % r.h.
Accuracy: ± 5 % r.h.

Supply voltage
Energy harvesting (via photovoltaic cell)
or type 1632 battery, DC 3 V (with daylight less than 200 lx)

Plastic housing PC
Colour: White, similar to RAL 9003
W x H x D: 78 x 82.5 x 12.5 mm
Weight: 43 g
Degree of protection: IP 30 (EN 60529)

EnOcean wireless
Frequency: 868.3 MHz
power: Max. 10 mW
Range: 10 to 30 m (depending on room arrangement and materials in the building)

Scope of delivery
Room temperature sensor FT/FTF
4 x adhesive dots
Without battery

Necessary additional components
CosiTherm® Wireless and/or
AFRISOhome gateway