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 typeInterchangeable
Dimensions268 x 72 x 30 mm
Operating range electronics-10…60 °C / 0…100 %RH
Accuracy at 23 ±5 °CProbe dependent
Measuring range with interchangeable probe0…100 %RH and -50…200 °C
Power supply / Power consumption9 V battery, power supply 4 mA consumption without back light
Long-term sensor stability<1 %RH / year
Humidity sensorProbe dependent
Temperature sensorProbe dependent
Response time t 63Probe dependent
Allowed wind speed20 m/s, with filter
Psychrometric calculationsAll psychrometric values
Number of probe inputs1
Calibration / adjustmentmultipoint adjustment via keypad
Initialisation timeTypically <2 sec.
Measurement intervaltypically 1 second (without calculations)
Display typeGraphic display. Display freely configurable.
Battery indicatorLow Batt. Display
Exploitation softwareROTRONIC HW4.2
Menu guidanceYes
Trend indicatorYes
Statistical functionsMin / Max, Average
Probe adjustment by softwareYes, with service cable
Probe adjustment by keypad1 point or multi-point temperature and humidity adjustment
Event loggingSystem related events (FDA, GAMP)
Firmware updateWith internet,HW4 software and service cable
User informationfrom Software HW4 (devicemanager)
Data processing via HW4Yes
Device Protection by passwordYes
Sensor diagnostics (drift, state)Programmable; factory default - Off
Audit Trail/ electronic recordsFDA 21 CFR Part 11 and GAMP compatible
External datalogging2000 Records
Choice of Battery / rechargeable batteryYes
Service InterfaceMini USB (UART)
Service InformationCalibration interval
Reverse voltage protectionMechanically in the connector
Max. cable length service cable5 m
Max. probe cable length10 m
Enclosure materialABS
IP protection ratingIP40
Fire protection classUL94-HB Compliant
FDA/GAMP compatibilityFDA 21 CFR Part 11 and GAMP compatible

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