Rotronic HF3 Humidity Transmitters for Relative Humidity, Dewpoint, and Temperature

The Rotronic HF3 is a humidity transmitter designed for fixed installation. It measures humidity and temperature, and calculates dew/frost point. It has a range of 0 to 100 %RH and -40 to 140°F (-40 to 60°C).

The HF3 transmitter is available in a space, a duct and a wall mount version. The space mount version is used in offices and rooms where design is important. The duct and wall versions are used for HVAC applications focused on reliability and repeatability. All of these transmitters have a 2 or 2 x 2-wire or a 3/4 wire version power option.

These transmitters can be set to multiple settings and functions and can configured and enabled with the ROTRONIC HW4 software.

Key Specifications

  • Measures: humidity, temperature, dew/frost point
  • Accuracy: ±2 %RH/ ±0.3 K, at 23°C
  • Temperature limit at probe: -40° to 140°F (-40° to 60°C)/ 0 to 100 %RH; with LCD 14° to 140°F (-10° to 60°C)/ 0 to 100 %RH (models with display only)
  • Adjusted at 23°C and 10, 35, 80%RH
  • Power supply: 15 to 40 VDC or 12 to 28 VAC
  • Models with display have a backlight

Supporting Documentation
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