Temperature and humidity sensor FTM 20 TF

  • Maintenance-free battery-less operation
  • Solar-operated energy storage module for several days of operation even in darkness
  • Either easy adhesive mounting or placement by means of base
  • Battery operation optionally possible


Wireless sensor for determination of the ambient temperature and air humidity at a defined location and transmission to AFRISOhome gateway.


The temperature sensor FTM 20 TF measures the ambient temperature and the humidity at regular intervals. Significant changes of the sensor data are immediately transmitted to the AFRISOhome gateway; they can be used as parameters to control actuators such as the radiator actuators AVD 30 or extractor fans with EnOcean wireless technology. The energy required to send a wireless telegram is generated by means of the integrated photovoltaic cell. The integrated energy storage module allows for operation for several days even in total darkness. In permanently dark environments (such as basements or warehouses) it is also possible to use a button cell battery.
A double-sided adhesive strip allows for extremely easy mounting of the compact housing to walls or furniture. It is possible to plug on a metal plate which serves as a base for placing the sensor on a shelf, a window sill or a sideboard.

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

Measuring range
Temperature: -20/+60 °C
Accuracy: ±0.5 K
Humidity: 0/100 % r.h.
Accuracy: ±4.5 % r.h.

Supply voltage
Energy harvesting (via photovoltaic cell) or CR 1225 button cell

Colour: White, similar to RAL 9010
W x H x D: 76.2 x 22 x 15 mm
Weight: 20 g
Degree of protection: IP 40 (EN 60529)

Operation start up time with empty energy storage module
Typically: 2.5 min at 400 lx/25 °C

EnOcean wireless
EEP: A5-04-03
Frequency: 868.3 MHz
Transmission power: Max. 10 mW
Range: 10 to 30 m (depending on room arrangement and materials in the building)

Scope of delivery

– Temperature sensor
– Cap triangular or quadrangular
– Base
– 1x adhesive dot
– Without battery

Necessary additional components
– AFRISOhome gateway