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Rotronic HF-7 Heavy Duty Transmitter


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.


Measures relative humidity, temperature and dew/frost point in industrial environments and outdoors. For use in harsh conditions.


  • Accuracy: ±1.0 %rh / ±0.2 K at 23°C ±5 K
  • Temperature limit at probe: max. -100…200 °C / 0…100 %rh
  • Range of application electronics: -40..85 °C / 0…100 %rh; -10…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 type Industrial metal probe
Operating range -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 consumption 15...40 VDC / 12...28 VAC
Long-term stability <1 %rh / year
Humidity sensor Hygromer IN-1
Temperature sensor PT100 1/3 DIN Class B
Response time t 63 <10 sec.
Psychrometric calculations Dew or frost point
Number of probe inputs 1
Calibration / adjustment with Software HW4
Initialisation time Typically 1.9 sec.
Exploitation software ROTRONIC HW4
Probe adjustment by software Yes, with service cable
Firmware update With internet and HW4 software
Data processing via HW4 with interface cables
Circuit type 2 -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 Interface Mini USB (UART)
Probe material Stainless steel 1.4305 (V2A)
Enclosure material Aluminum die casting
Cable connections 1x M16x1.5 or ½ "conduit adapter
IP protection rating IP67
Fire protection class incombustible
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible
Weight 800.0000



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