Inexpensive HVAC Transmitter – Rotronic HygroFlex 1 – HF1

Features

  • Measures relative humidity and temperature
  • Hygromer® IN-1 humidity sensor
  • Adjustable at 35 % / 80 %RH
  • Two freely scalable analog voltage or current outputs
  • USB service interface
  • Small footprint
  • Easy mechanical installation
Enquiry

The HygroFlex 1 series is the latest development in inexpensive HVAC transmitters for relative humidity and temperature. The devices are equipped with the tried-and-tested Hygromer IN-1 sensor and boast unbeatable value for money. The optional Rotronic HW4/SW21 software enables you to change the scale and calibrate and adjust the transmitter.

Applications
• Heating, ventilation and air conditioning

Specification

GENERAL
Transmitter type 2-wire type: HF120
3/4-wire type: HF13x
Supply voltage 12…28 VAC / 15…40 VDC
Current consumption 2-wire maximum 40 mA
3/4-wire
with voltage output: < 15 mA
with current output: < 55 mA
Parameters Humidity and/or temperature
Housing material / IP ABS / IP 65 (space mount version IP30)
Weight Wall version type W: 140 g
Duct version 100 mm type D: 140 g
Duct version 300 mm type F: 200 g
Space mount version type S: 90 g
Sensors integrated in device Yes
Operating and measurement range -20…50 °C
0…100 %RH (non-condensing)
CE / EMC compatibility 2004/108/EC
HUMIDITY MEASUREMENT
Humidity sensor Rotronic Hygromer® IN-1
Accuracy type W & type D at 23 °C ± 5 K <± 2 %RH (10…90 %RH)
Accuracy type S at 23 °C ± 5 K <± 3 %RH (10…90 %RH)
Long-term stability < 1.5 %RH per year
Response time t63 30 s (63 % of a rise 35…80 %RH) without filter
TEMPERATURE MEASUREMENT
Sensor Thermistor
Standard temperature scale 0…50 °C or 0…100 °F
Precision at 23 °C ± 5 K ± 0.3 °C, type S ± 1 °C
Response time 4 s
OUTPUTS
Number 2 analog outputs freely scalable
Current 04…20 mA
Voltage 0…1/5/10 VDC

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Rotronic HF1 HygroFlex1 Inexpensive HVAC Transmitter-DpstarGroup

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