HygroPalm 23-A Handheld Hygrometer

HygroPalm 23-A Handheld Hygrometer & Calibrator with 2 Probe inputs

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The HP23 is a multi-function hand-held indicator that can read the data from two HygroClip 2 probes and display relative humidity, temperature and a variety of calculated parameters (dew point, frost point, etc.) Any probe input can also be configured by the user to accept a third party analog probe (restrictions apply).

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

The HP23 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 measurement: -10 to 60°C / 0 to 100 %RH
  • All psychrometric calculations
  • Adjusted at 23°C and 10, 35, 80 %RH
  • Service interface (UART)
Dimensions 196 x 72 x 35 mm
Operating range electronics -10…60 °C / 0…100 %RH
Accuracy at 23 ±5 °C Probe dependent
Power supply / Power consumption 9V battery or accumulator Power Supply: Consumption 10 mA without backlight
Long-term stability sensor <1 %rh / year
Humidity sensor Probe dependent
Temperature sensor Probe dependent
Response time t 63 Probe dependent
Allowed wind speed Probe dependent
Psychrometric calculations All psychrometric values
Number of probe inputs 2 (HygroClip2 or Analog)
Calibration / adjustment multipoint adjustment via keypad
Initialisation time Typically <3 sec.
Display type Standard, 3-line or large. Display freely configurable.
Display resolution 3 decimals
Backlight with Backlight
Keypad (with display only) Yes
Battery indicator Low Batt. Display
Real time clock w.backup battery Yes
Memory size 20,000 records (2x 10,000 data pairs)
Exploitation software ROTRONIC HW4.2
Menu guidance Yes
Trend indicator Yes, for models with display
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 Yes
Firmware update With internet and HW4 software
User information from Software HW4 (devicemanager)
Data processing via HW4 Graphics, statistics, analysis, qualification, etc.
Audit Trail/ electronic records FDA 21 CFR Part 11 and GAMP compatible
Choice of Battery / rechargeable battery Yes
Supply for 3rd party probes Yes, battery voltage
Service Interface Mini USB
Service Information Date of last calibration
Reverse voltage protection Mechanically in the connector
Max. cable length service cable 5 m
Probe material Dependent on probe
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 300g

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