Temperature & Humidity Transmitter

Rotronic HygroFlex4 HF4 - Temperature & Humidity 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 extensive settings and functions that can be configured and enabled with the ROTRONIC HW4 software after connecting the HF4 to a PC.

• Measures relative humidity and temperature, or humidity only, or temperature only
• Calculates the dew or frost point
• Accuracy at 23 C: ± 1.0 %RH and ± 0.2°C
• Configurable analog output signals (signal type, parameter and range)
• Optional LCD display and keypad
• Analog output signals or digital interface
• Digital interface allows the simultaneous reading of relative humidity, temperature and one calculated parameter
• Digital interface offers several communication protocol options, including a ModBus compatible protocol
• Automatic RH sensor test with optional sensor drift correction
• Configurable fail safe mode – fixed output signals in the event of a humidity or temperature sensor failure
• Simulator function (fixed output signals) for on-site validation of the measurement loop