Rotronic HygroPalm HP31 Handheld Humidity and Temperature Meter
Rotronic HygroPalm HP31 Handheld Humidity & Temperature Meter
Portable, easy-to-use handheld meter for humidity, temperature, and dew point measurement with ±2% RH accuracy, LCD display, and HW4 compatibility.
The Rotronic HP31 is a compact handheld device designed for reliable spot checks of humidity, temperature, and dew point. It features a fixed, integrated sensor, a clear LCD display, calculated psychrometric values, user-settable alarms, USB connectivity, and compatibility with HW4 software. Ideal for HVAC service, building diagnostics, storage monitoring, and field inspections.
Key Features
Fixed integrated humidity & temperature sensor
Measures RH, Temperature, Dew/Frost Point
Accuracy (integrated sensor):
±2% RH (typical)
±0.3°C
Large LCD display
Adjustable audible & visual alarms
Stores up to 8,000 records (HP31 has 1 × memory block)
Logging interval: 1 s to 24 h
USB-Micro connection (for data and configuration)
HW4 software compatible
Powered by standard AA battery
Lightweight & portable
Technical Specifications
| Parameter | Specification |
|---|---|
| RH Range | 0…100% RH |
| RH Accuracy | ±2% RH typical |
| Temperature Range | –20…70°C (instrument) |
| Temp Accuracy | ±0.3°C |
| Dew Point | Calculated |
| Memory | 8,000 points |
| Logging Interval | 1 sec – 24 h |
| Display | Graphic LCD |
| Interface | USB-Micro |
| Power | 1 × AA battery |
| Dimensions | 160 × 63 × 30 mm |
| IP Rating | IP40 (non-sealed handheld) |
Applications
HVAC inspections
Facility maintenance
Warehousing & storage
Museums & archive rooms
QA & validation checks
What’s in the Box
HP31 handheld meter
AA battery
USB cable
Quick instruction sheet
FAQ
Q: Does HP31 support external probes?
No — HP31 has an integrated fixed sensor. HP32 is used for external HC2/HC2A probes.
Q: Does HP31 calculate dew point?
Yes — dew/frost point is included.
Q: Is the data downloadable?
Yes — via USB-Micro to HW4 software.
Q: Does it support long-term logging?
Yes — up to 8,000 points.