The HF5-series is compatible with HygroClip2 probes with integrated AirChip3000 technology – thanks to which the probes achieve an unparalleled degree of accuracy not seen before. 
In combination with advances in sensor technology and integration, the HygroFlex HF52, HF53, HF54 and HF56 transmitters combined with a HC2-S probe provide superb precision and state-of-the-art functionality, taking humidity and temperature measurement to a whole new level of accuracy < 0.8 %rh and < 0.1 K at 23 °C. 

Measures relative humidity and temperature and calculates all psychrometric parameters in the fields of HVAC, industry and pharmaceuticals.


  • Relative humidity and temperature measurement 
  • Dew Point and other psychrometric calculations 
  • Interchangeable probe for easy maintenance 
  • Wide choice of probes to satisfy every application 
  • Low voltage and mains versions 
  • Freely scalable analogue signals 
  • Various digital outputs available
  • Available with metal housing
Accuracy at 23 ±5 °C Prob dependent
Operating range HF520: -25…60 °C / 0…100 %rh / HF53/54/56: -40…60 °c / 0…100 %rh / HF5X with screen -10…60 °C
Power consumption HF52: 10...28 VDC: 10 V+(0.02x load) HF53: 15…40 VDC /12…28 VAC HF54 with galvanic isolation: 9...36 VDC HF56 with galvanic isolation: 85...240 VAC HF52: max 40 mA HF53 <100mA, HF55 <300mA
Psychrometric calculations All psychrometric values
Backlight with Backlight
Display type Optional graphics display. Presentation configurable.
Initialisation time Typically <3 sec.
Number of probe inputs 1
Alerting Sensor break or short circuit, programmable.
Alarm indicators Yes
Exploitation software ROTRONIC HW4
Probe adjustment by software Yes, with service cable
Probe adjustment by keypad display / keyboard
Firmware update With internet and HW4 software
Data processing via HW4 Graphics, statistics, analysis, qualification, etc.
Analogue outputs scaleable by the user Yes
Analog output signal (standard) 2 x 0…1 V, 0…5 V, 0…10 V, 0(4)…20 mA
Automatic load compensation Yes
Circuit type 2 -Wire or 3/4-Wire
Communication interfaces RS-485 / USB / LAN / WLAN / PoE (Modus B)
Cable connections M16 cable gland and screw terminals
Enclosure material ABS / Aluminium (HF5xxS)
IP protection rating IP65 / Corresponds to UL94-HB protection class
Service Interface Mini USB (UART)
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible
Dimensions HF52, HF53, HF54: 129 x 72 x 45 mm
HF56: 192 x 102 x 52 mm
Weight 220 g / 500 g

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