Active room humidity and temperature sensor optionally with passive sensor

The RFTF is a humidity/temperature sensor for recording the relative humidity and temperature of the air, e.g. in refrigeration, air-conditioning and clean-room applications technology, in living spaces, offices, hotels, technical rooms, meeting and conference venues.

Technical Data

Power supply:24V AC/DC ± 20% with output 0-10V
15-30 VDC ± 20% with output 4...20mA
sensors:capacitive humidity sensor, dew resistant,
small hysteresis, high long-term stability
Humidity measuring range:relative humidity 0...100% or
absolute humidity 80g/mY
Humidity deviation:relative humidity: ± 3% rH (20...80%);
at +20 °C, otherwise ± 6% rH.
absolute humidity: results from measurement
errors the rel. humidity and temperature
Output humidity:0-10 V for U-variant
4...20mA for I-variant (must be connected
otherwise no T output signal)
Temperature meas. range:0-10V or 4-20mA preset to 0...+50 °C
other mea. ranges can be set: -50...+50 °C,
0...+80 °C, -35...+35 °C, - 20..+80 °C, -35...+75 °C
passive sensor see data sheets
Temperature deviation:± 0,4K at 20°C
Temperature output:0-10 V or 4...20mA or Ohm value
Ambient temperature:0...+50°C
Humidity:< 95 % rH, non-condensing air
Housing:Plastic, material ABS,
Colour pure white (similar to RAL 9016)
(other colours optional)
Dimensions:80 x 105 x 23.5 mm
Electrical connection:0.14 - 1.5 mm² via screw terminals on
circuit board
Installation:Wall mounting or
on flush-mounted box Ø 55mm, bottom part
with 4 holes, for mounting on vertically or
horizontally installed flush-mounted boxes
Long-term stability:± 1%/year
Protection class:III (according to EN 60730)
Protection type:IP30 (acc. to IEC 529)
Standards:CE conformity, electromagnetic
compatibility according to EN 61 326 +A1+A2,
EMV Directive 89/336/EWG