HygroFlex3 - HF3 - HVAC transmitter

HygroFlex3 - HF3 - HVAC transmitter

R-Type / S-Type
Measures relative humidity and temperature and calculates the dew/frost point in offices and rooms where good looks play a role.

W-Type / D-Type
Measures relative humidity and temperature and calculates the dew/frost point in HVAC applications focused on relability and repeatability.


• Accuracy: ±2 %rh / ±0.3 K at 23°C ±5 K
• Temperature limit at probe: -40…60 °C / 0…100 %rh
• Range of application electronics: -40…60 °C / 0…100 %rh, -10…60 °C with LCD
• Service interface
• Adjusted at 23 °C and 10, 35, 80 %rh

More Information
Backlight with Backlight
Display type Optional graphics display. Presentation configurable.
Allowed wind speed 20 m/s, with filter
Operating range -40…60 °C / -10…60 °C (Models with display) 0…100 %rh, non-condensing
Dimensions Wall: ø 82 x 43, probe length 100 mm
Duct: ø 82 x 43, probe length 207 mm
Room: 82 x 82 x 26 mm
Power consumption 15…40 VDC or 12…28 VAC/ <100 mA
Alarm indicators Yes
Data processing via HW4 with interface cables
User information from Software HW4 (devicemanager)
Software Update With internet and HW4 software
Remote control functions Via HygroPalm and service cable
Analogue outputs scaleable by the user Yes
Psychrometric calculations Dew or frost point
Trend indicator Yes, for models with display
Exploitation software ROTRONIC HW4
Probe type Integrated
Response time t 63 <12 s for 63% of a 35> 80% (1 m / sec air flow at the sensor)
Reproducibility Airchip <0.02 %rh / 0.01 K
Accuracy at 23 ±5 °C ±2.0 %rh / ±1.0 %rh (Type R), ±0.3 K / ±0.2 K (Type R)
Type of output signals 2
Digital output signal (standard) UART
Enclosure material ABS
Filter cartridge Polyethylene dust filter, gray, 20 um
Probe protection Polycarbonate plastic cage, white
Probe material Polycarbonate
Max. cable length Up to 5 m with passive cable. Up to 100 m with active cable.
Service Information Calibration interval
Measurement interval typically 1 second (without calculations)
Measuring range with integrated probe -40…60 °C / 0…100 %rh
Change of output signal w/o adjustment Yes
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible
Fire protection class Complies UL94-HB
IP protection rating HF3x-S/ HF3x-R: IP20
HF3x-W/ HF3x-D: IP65
Service Interface Mini USB (UART)
Device Protection by password Yes
Analog output signal (standard) 0…20 mA, 4… 20 mA; 0… 1 V, 0… 5 V, 0… 10 V
Min. / max. load voltage / current signal V min = 10 V + (0.02 x Load*) * = Resistance in ohms
Probe adjustment by software Yes, with service cable

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