Rotronic HF4 High Accuracy HVAC Transmitters for Relative Humidity, Dewpoint, and Temperature

The Rotronic HF4 is a fixed installation humidity transmitter used in HVAC and light industrial applications. This transmitter can measure temperature and humidity, and can calculate dew/frost point, within range of 0 to 100 %RH and -58° to 212°F (-50° to 100°C).

There are two different versions of these transmitter: the duct version, and the wall version. Both of these transmitters have a 2 or 2 x 2-wire or 3/4 wire session power option.

This HF4 transmitter can be set to multiple settings and functions and can be configured with the ROTRONIC HW4 software.

Key Specifications

  • Measures relative humidity and temperature, humidity only, or temperature only
  • Calculates the dew or frost point
  • Accuracy: ± 1.0 %RH and ± 0.2 K at 23°C
  • Range of application electronics: -40° to 140°F (-40° to 60°C)/ 0 to 100 %RH; 14° to 140°F (-10° to 60°C) with LCD
  • Configurable analog output signals (signal type, parameter and range)
  • Optional LCD display and keypad
  • Configurable fail safe mode

Supporting Documentation
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