Rotronic HygroPalm HP32 Handheld Humidity & Temperature Indicator

A. Product Overview

The Rotronic HygroPalm HP32 is a professional, high-precision handheld humidity and temperature indicator designed for demanding field and audit work. Unlike fixed-sensor handheld meters, the HP32 works with external Rotronic HC2 and HC2A probes (except HC2-LDP), allowing you to select the right probe for your environment and measurement range. Depending on probe type, it can support measurement ranges up to –100 to 200°C and 0 to 100% RH.

The HP32 includes advanced psychrometric calculations (dew/frost point, wet bulb, enthalpy, vapor pressure, mixing ratio and more), 64,000-point data logging memory (8 × 8,000), visual/audible alarms, and USB-Micro connectivity for configuration, logging download and charging. Its rugged IP65 handheld housing (ABS + TPR) makes it suitable for onsite inspections in HVAC, building audits, pharma manufacturing, agriculture/food environments, and industrial monitoring.

Key highlights:

• Works with HC2/HC2A probes (except HC2-LDP)

• Psychrometric outputs (Dp/Fp, Tw, H, etc.)

• Memory: 64,000 points (8 × 8,000)

• Logging interval: 1 sec to 24 h

• IP65 handheld housing

• Rechargeable Li-ion battery and USB-Micro interface (data + charging)

• HW4 compatible (HW4 > V3.9)

B. Working Principle

The HP32 functions as a handheld indicator and data logger that measures humidity and temperature through an external probe and calculates derived psychrometric values.

1. Probe-Based Measurement: An external HC2 or HC2A probe measures relative humidity and temperature in the environment. Measurement range and accuracy depend on the selected probe.

2. Signal Processing: The instrument reads the probe signals and converts them into stable RH and temperature values for display and logging.

3. Psychrometric Calculations: Using measured RH and temperature, the HP32 computes psychrometric parameters such as dew point / frost point, wet bulb temperature, enthalpy, vapor pressure, mixing ratio, and other supported outputs.

4. Display & Alarms: Values are shown on the graphic LCD. If the measured values exceed user-defined limits, the device triggers visual and audible alarms.

5. Data Logging: When logging is enabled, the HP32 stores readings at the selected interval (1 second to 24 hours) in its internal memory (up to 64,000 points).

6. Data Transfer & Configuration: Logged data and device settings can be managed through USB-Micro, with HW4 software for configuration and download. The same interface supports charging.

C. Why It Is Used

The HP32 is used where accurate humidity and temperature verification is required and where users need flexibility to choose different probes for different environments and ranges.

Common reasons to use the HP32:

• Flexible measurement with external probes: One handheld unit can cover multiple applications by using different HC2/HC2A probes.

• HVAC troubleshooting and commissioning: Helps identify humidity issues, condensation risk, and dew point conditions during service and audits.

• Building management audits: Supports environmental verification for facilities, technical rooms and controlled zones.

• Pharmaceutical manufacturing and controlled environments: Useful for routine checks, validation support and monitoring tasks where RH/temperature stability matters.

• Food, agriculture and storage environments: Helps confirm climate conditions impacting product quality and shelf life.

• Documentation and trend analysis: Data logging and downloadable records help in quality reporting and maintenance decisions.

• Psychrometric calculations in the field: Dew point, wet bulb, enthalpy and related values help diagnose air handling and moisture control problems quickly.

D. Suitable Buyers

The HP32 is suitable for:

• HVAC service and commissioning teams who need spot checks plus psychrometric values

• Facility managers and maintenance engineers conducting regular building audits

• QA / validation engineers in pharma and regulated environments needing logged records

• Cleanroom and controlled-area operators performing routine environmental verification (probe selection as required)

• Food processing, agriculture and cold storage teams monitoring humidity-related quality risks

• EPC contractors, system integrators and instrumentation teams working on HVAC/BMS and industrial monitoring projects

• Energy auditors and building consultants requiring reliable RH/temperature evidence during inspections

FAQ

Q1: Which probes are compatible with the Rotronic HP32?
The HP32 works with all HC2 and HC2A probes, except HC2-LDP.

Q2: Does the HP32 measure humidity and temperature directly?
The HP32 measures through a connected external HC2/HC2A probe. Range and accuracy depend on the probe selected.

Q3: What is the data logging capacity of the HP32?
It stores up to 64,000 data points (8 memory blocks × 8,000 points each).

Q4: Can I change the logging interval?
Yes. The logging interval is adjustable from 1 second to 24 hours.

Q5: Does the HP32 calculate dew point?
Yes. It supports dew point and frost point calculations, along with additional psychrometric values.

Q6: Which psychrometric values can the HP32 display?
It supports multiple psychrometric outputs such as Dp/Fp (dew/frost point), Tw (wet bulb), enthalpy, vapor pressure, mixing ratio, and other supported parameters.

Q7: Does the HP32 have alarms?
Yes. It includes visual and audible alarms that can be set by the user.

Q8: Is the HP32 suitable for field use?
Yes. It has an IP65 handheld housing (ABS + TPR) designed for onsite work.

Q9: How is the HP32 powered and charged?
It uses a rechargeable Li-ion battery and supports charging via USB-Micro.

Q10: Can I connect the HP32 to software for configuration and download?
Yes. It connects via USB-Micro and is compatible with HW4 software (HW4 version > V3.9).