Rotronic HF3 Series Humidity Temperature Transmitter

The HF3 transmitter is designed for fixed installation in cost sensitive commercial HVAC applications where conditions are within the range of 0 to 100 %RH and -40 to 60°C (-40 to 140°F). The HF3 will satisfy application requirements ranging from the most basic to demanding.

The HF3 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 HF3 to a PC.

• Relative humidity, temperature measurement and dew point calculation
• Configurable “Fail safe” mode: pre-determined output signals in the event of a sensor failure
• Configurable humidity sensor test and drift correction
• Outstanding accuracy and repeatability
• Hygromer® IN-1 humidity sensor
• Auto-diagnostics and automatic correction
• Freely selectable and scalable analog outputs
• Also available as hygrostat and thermostat
• Analog outputs assignable to relative humidity, temperature or dew point
• 2-wire or 3/4-wire systems available
• Available with two integrated relay contacts for use as a thermo-hygrostat
• Optional LC display (space mount only)
• 1 or 2 analog output signals: %RH, temperature, dew or frost point
• Signal type: 4…20 mA, 0…20 mA, 0…1 V, 0…5 V or 0…10 V
• Freely scalable output signals

The HygroFlex3-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.

• 0…100%RH and -40…60°C (-40…140°F)
• Models with optional LC display: 0…100%RH and -10…60°C (14…140°F)
• Accuracy at 23 °C: ± 2.0 %RH and 0.3 °C
• Supply voltage: 10 to 28 VDC (2-wire models) or 15 to 40 VDC / 12 to 28 VAC (3-wire models)

• Rotronic HF3 Series Datasheet.pdf
• Rotronic HF3 Manual.pdf