The HygroPalm23-A is the high-end product in our range of handheld instruments. Apart from measuring humidity and temperature, it also calculates all psychrometric parameters and offers various additional functions. The measurement results can be recorded continuously and these separated simply using the batch function. All ROTRONIC transmitters in the Airchip 3000 series can be adjusted with the HP23-A via a service cable.

Mobile applications in HVAC, the pharmaceutical industry, building management systems, museums and warehouses

• Data recording function up to 10'000 data records (with date, time, batch no.)
• Two probe connections for all ROTRONIC HC2 probes or analog third-party probes
• Adjustment of transmitters HF3, HF4, HF5, HF7, HF8, via service cable
• All psychrometric calculations
• Integrated clock (real time clock) for timestamp for every measured value
• Battery charging function
• Interface (USB)



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 Analogue)

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


with Backlight

Keypad (with display only)


Battery indicator

Low Batt. Display

Real time clock w.backup battery


Memory size

20,000 records (2x 10,000 data pairs)

Exploitation software


Menu guidance


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