This document is the user guide of Rotronic HygroFlex HF7 Humidity Temperature Transmitters User Guide. It introduces the overview, mechanical configurations and dimensions, general description, user configurable settings and functions, mechanical installation, electrical installation, operation, and maintenance of the product.
The Rotronic HygroFlex HF7 transmitter series is designed for fixed installation in industrial applications to measure relative humidity and temperature. Depending on the model (HF72 or HF73), it provides linear analog outputs via a 2-wire loop-powered configuration or a 3-wire setup with voltage or current signals. The device features well-proven sensors, including a ROTRONIC Hygromer® IN1 capacitive sensor for humidity and a Pt100 RTD for temperature.
| Measured Humidity Range | 0 to 100 %RH |
|---|---|
| Measured Temperature Range | -100 to 150 °C |
| Electronics Operating Range | -40…85 °C |
| Display Operating Range | -10...60°C |
| Humidity Sensor Type | ROTRONIC Hygromer® IN1 capacitive sensor |
| Temperature Sensor Type | Pt100 RTD |
| Analog Output Resolution | 16-bit |
This manual applies to all instruments of the HF7 series with firmware version 3.0 or higher.
Yes, using the ROTRONIC HW4 software, the user can configure the HF7 to calculate either the dew point or the frost point.
With both output circuits closed, the maximum current consumption is 40 mA.