HF7 Humidity Transmitter

 For extreme environments

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The HF7 transmitter series is designed for fixed installation in industrial applications where conditions are within the range of 0 to 100 %RH and -100 to 150°C (-148 to 302°F). The probe of the HF7 can survive exposure to temperature up to 200°C (392°F). Equipped with a metal enclosure and a metal probe, the HF7 can handle the toughest industrial environments.

The HF7 transmitter is available in different configurations and has extensive settings and functions that can be configured and enabled with the ROTRONIC HW4 software after connecting the HF7 to a PC.


  • Accuracy: ±1.0 %rh / ±0.2 K at 23°C ±5 K
  • Limits at probe: max. -100â¦200 °C / 0â¦100 %RH
  • Limits of application electronics: -40..85 °C / 0â¦100 %RH; -10â¦60 °C with LCD
  • Metal housing (aluminum diecast) and probe of stainless steel or PPS
  • Various probe lengths available
  • Use as simulator for system validation*
  • Service interface
  • Adjusted at 23 °C and 10, 35, 80 %RH
Probe typeIndustrial metal probe
Operating range electronics-40..85 °C / 0…100 %rF
Accuracy at 23 ±5 °C±1.0 %RH / ±0.2 K
Measuring range with integrated probe-100…200 °C / 0…100 %RH
Power supply / Power consumption15...40 VDC / 12...28 VAC
Long-term stability sensor<1 %rh / year
Humidity sensorHygromer IN-1
Temperature sensorPT100 1/3 DIN Class B
Response time t 63<10 sec.
Psychrometric calculationsDew or frost point
Number of probe inputs1
Calibration / adjustmentwith Software HW4
Initialisation timeTypically 1.9 sec.
Exploitation softwareROTRONIC HW4.2
Probe adjustment by softwareYes, with service cable
Firmware updateWith internet and HW4 software
Data processing via HW4with interface cables
Circuit type2 -Wire or 3/4-Wire
Analog output signal (standard)2 x 0…1 V, 0…5 V, 0…10 V, 0(4)…20 mA
Service InterfaceMini USB (UART)
Probe materialStainless steel 1.4305 (V2A)
Enclosure materialAluminum die casting
Cable connections1x M16x1.5 or ½ "conduit adapter
IP protection ratingIP67
Fire protection classincombustible
FDA/GAMP compatibilityFDA 21 CFR Part 11 and GAMP compatible

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