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This product requires a HygroClip2 probe which must be purchased separately. See the accessories tab


  • 2 probe inputs
  • AirChip3000 Technology
  • Data logs up to 20,000 readings
  • Accuracy from ±0.8 %RH to ±1.5 %RH depending on probe
  • Clear backlit graphic display
  • Ergonomic and robust ABS housing
  • mini-USB interface

The Rotronic HygroPalm 23 handheld humidity meter is the latest development in handheld measuring instruments for relative humidity, temperature and dew point. Based on AirChip3000 technology, the Rotronic HygroPalm 23 achieves a degree of accuracy not seen before as well as outstanding repeatability, auto-diagnostics and auto correction along with the ability to perform all psychrometric calculations.

The HygroPalm 23 can read the data from up to two HygroClip 2 probes and display relative humidity, temperature and a calculated parameter such as the dew or frost point. The accuracy of humidity readings is an unprecedented ±0.8%. Up to 20,000 readings can be stored on the meter for later recall. These values can also be displayed graphically or transferred to a computer via the mini-USB interface with the optional Rotronic HW4 software. HygroPalm 23 indicator also has an extensive set of settings and functions that can be enabled and configured by the user either directly from the keypad or with the HW4 software. In spite of its sophistication, the HP23 can still be used just as a simple humidity and temperature indicator.

Rotronic HygroPalm 23 handheld humidity meters utilize HygroClip 2 probes which are available in many models to suit specific applications, from simple plug-in probes for use with a handheld instrument or data logger to a more sophisticated cable probe for high temperature and other special applications.

AirChip3000 Technology

Both the HygroPalm 23 humidity meter and HygroClip 2 probes incorporate AirChip3000 technology. The intelligence of AirChip3000 technology enables advanced sensor diagnostics. Humidity and temperature readings are compensated over 30,000 reference points. Should the sensors deviate from factory defined parameters, measurement values can be compensated automatically and a digital alarm triggered. AirChip3000 technology also includes a data logging features that allows up to 2,000 measurement values to be stored within the probe. Additionally, the user is able to configure the measurement interval, set alarm limits, scale the output signal and download data using optional Rotronic HW4 software.

Applications for the Rotronic HygroPalm 23

  • Food and pharmaceutical industry
  • Printing and paper industry
  • Meteorology
  • Agricultural
  • Climatology

Required Components

These additional components are required for the operation of your product. We strongly advise you to purchase these components unless you already own them or own a suitable alternative.

Rotronic HygroClip2 Probes
HygroClip2 probes with AirChip3000 technology offering ±0.8 %rh and ±0.1 K accuracy
In Stock


Rotronic Calibration Devices
Various calibration devices for Rotronic probes


Rotronic Service Cables
Service cables for Rotronic HygroPalm humidity meters
Rotronic Extension Cables
Extension cables for connecting HygroPalm humidity meters with HygroClip 2 probes


Rotronic HW4 Software
HW4 software for Rotronic HygroPalm humidity meters available in four editions
In Stock


Rotronic Carrying Case
Carrying case for Rotronic HygroPalm 22 with probe

Application Notes

Here's how some of our customers used this product.

Tank Farm

The Background: Our customer is a petrochemical company that manages a large tank farm that utilizes more than 1000 automated valves used to regulate the flow between tanks and pipelines. They routinely test these valves to ensure proper operation.

The Problem: Moisture can cause significant damage to the electronics that control the valves. Identifying this moisture before it creates problems is integral to maintain the health of the valves.

The Solution: The Rotronic HygroPalm23, paired with a Rotronic HC2-S probe, was an economical solution allowing the end user to quickly and easily spot check air moisture.