TF1 - inexpensive Temperature Transmitter

Temperature measurement made easy!

The Transmitter-TF1 is a inexpensive HVAC transmitter for temperature measurement. The Rotronic SW21 software enables you to scale the temperature range.


  • Measures temperature
  • Two freely scalable analog voltage or current outputs
  • USB service interface
  • Easy mechanical installation
Accuracy at 23 ±5 °C ±0.3 K
Operating range -20…50 °C / 0…100 %RH (non-condensing)
Parameters Temperature
Power consumption 12…28 VAC / 15…40 VDC
Standard temperature scale 0...50 °C or 0...100 °F
Temperature sensor Thermistor
Response time 4s
Current consumption 2-wire type max. 40mA / 3/4 wire type, with voltage output: < 15 mA, with current output: < 55 mA
Analogue outputs scaleable by the user Yes
Circuit type 2 -Wire or 3/4-Wire
Min. / max. load voltage / current signal
Housing ABS
IP protection rating IP65
CE / EMC conform 2004/108/EC
Weight Wall version type W and A: 140 g / Duct version 100 mm type B and D: 140 g / Duct version 300 mm type E and F: 200 g / Space mount version type L and S: 90 g

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