HygroPalm 22-A Handheld Hygrometer

HygroPalm 22-A Handheld Hygrometer with Interchangeable Probe

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The HP22 is a versatile hand-held indicator that displays relative humidity, temperature and a variety of calculated parameters such as dew or frost point based on the measurements of a HygroClip 2 plug-in probe.

Probe selection is based on the application. Depending on the HygroClip 2 probe model, the measuring range is within 0 to 100 %RH and -100 to 200°C (-148 to 392°F). The HygroClip 2 probes feature durable sensors and consistent performance. All HygroClip 2 probes can be hot-swapped to facilitate routine calibrations.

The HP22 indicator offers extensive settings and functions that can be enabled and configured by the user either directly from the keypad or with the ROTRONIC HW4 software.


  • Compatible with ALL ROTRONIC HC2 probes
  • Range of application: -10 to 60°C / 0 to 100 %RH
  • All psychrometric calculations available
  • Adjusted at 23°C and 10, 35, 80 %RH
  • Service interface (UART)
Probe type Interchangeable
Dimensions 268 x 72 x 30 mm
Operating range electronics -10…60 °C / 0…100 %RH
Accuracy at 23 ±5 °C Probe dependent
Measuring range with interchangeable probe 0…100 %RH and -50…200 °C
Power supply / Power consumption 9 V battery, power supply 4 mA consumption without back light
Long-term sensor stability <1 %RH / year
Humidity sensor Probe dependent
Temperature sensor Probe dependent
Response time t 63 Probe dependent
Allowed wind speed 20 m/s, with filter
Psychrometric calculations All psychrometric values
Number of probe inputs 1
Calibration / adjustment multipoint adjustment via keypad
Initialisation time Typically <2 sec.
Measurement interval typically 1 second (without calculations)
Display type Graphic display. Display freely configurable.
Backlight Yes
Battery indicator Low Batt. Display
Exploitation software ROTRONIC HW4.2
Menu guidance Yes
Trend indicator Yes
Statistical functions Min / Max, Average
Probe adjustment by software Yes, with service cable
Probe adjustment by keypad 1 point or multi-point temperature and humidity adjustment
Event logging System related events (FDA, GAMP)
Firmware update With internet,HW4 software and service cable
User information from Software HW4 (devicemanager)
Data processing via HW4 Yes
Device Protection by password Yes
Sensor diagnostics (drift, state) Programmable; factory default - Off
Audit Trail/ electronic records FDA 21 CFR Part 11 and GAMP compatible
External datalogging 2000 Records
Choice of Battery / rechargeable battery Yes
Service Interface Mini USB (UART)
Service Information Calibration interval
Reverse voltage protection Mechanically in the connector
Max. cable length service cable 5 m
Max. probe cable length 10 m
Enclosure material ABS
IP protection rating IP40
Fire protection class UL94-HB Compliant
FDA/GAMP compatibility FDA 21 CFR Part 11 and GAMP compatible
Weight 210g

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