This document is a user guide for the Rotronic AG HygroFlex HF4 humidity temperature transmitter.
This manual provides instructions for the Rotronic HygroFlex HF4 series of humidity and temperature transmitters. The HF4 series is designed for fixed installation in HVAC and light industrial applications, measuring relative humidity, temperature, and calculating dew or frost point. The series includes models with analog outputs (HF42, HF43) and digital interfaces (HF45).
| Measured parameters | Relative humidity with ROTRONIC Hygromer IN1 capacitive sensor and temperature with Pt100 RTD |
|---|---|
| Operating range | 0 to 100 %RH and -50 to 100 °C |
| Electronics operating range | -40…60 °C |
| Power supply (HF42) | 10…28 VDC |
| Power supply (HF45) | 6 to 40 VDC or 5 to 28 VAC |
| RS-485 network limit | 64 devices |
This manual applies to all instruments of the HF4 series with firmware version 3.0 or higher.
Yes, using the ROTRONIC HW4 software, the HF4 can be configured to calculate either the dew point or the frost point.