Rotronic HF4 Series Humidity Temperature Transmitter

The HF4 transmitter is designed for fixed installation in HVAC and light industrial applications that require precise measurement of humidity and temperature within the range of 0 to 100 %RH and -50 to 100°C (-58 to 212°F).

The HF4 transmitter is available in different configurations and has an extensive set of settings and functions that can be configured and enabled with the ROTRONIC HW4 software after connecting the HF4 to a PC.

In spite of its sophistication, the HF4 can be used just as a simple conventional humidity and temperature transmitter. Whether you decide or not to take advantage of its full potential, the HF4 will let you have it your way.

• Measures relative humidity and temperature, or humidity only, or temperature only
• Calculates the dew or frost point
• Integral probe – cannot be separated from transmitter. Duct (through-wall probe) and wall configurations
• Operating limits at probe 0 to 100 %RH and -50 to 100°C (-58 to 212°F) – except wall mount models
• Accuracy at 23 °C: ± 1.0 %RH and ± 0.2 °C
• 2-wire, loop-powered and 3-wire models
• Supply voltage: 10 to 28 VDC (2-wire models) or 15 to 40 VDC / 12 to 28 VAC (3-wire models)
• Optional LC display and keypad
• Analog output signals or digital interface
• Digital interface allows the simultaneous reading of relative humidity, temperature and calculated parameter

The HygroFlex4-series is ideal for all applications where exact measurement of humidity and temperature is of decisive importance. The transmitters can be used in a variety of fields for heating, ventilation and air conditioning applications, greenhouses, museums, warehouses, libraries, railway stations and for climate control in office buildings. Thanks to the exceptional long-term stability of the sensors and auto-diagnostics, the transmitters are both service-friendly and reliable and will save you time and money.

• Measures relative humidity and temperature, or humidity only, or temperature only
• Calculates the dew or frost point
• to 100 %RH and -50 to 100°C (-58 to 212°F) – except wall mount models
• Accuracy at 23 °C: ± 1.0 %RH and ± 0.2 °C

• Rotronic HF4 Series Datasheet.pdf
• Rotronic HF4 Manual.pdf