Key facts
- Brand
- Rotronic
- Model
- HF3
- Industry
- Industrial
- Documents
- 3
- Languages
- EN
- Last added
- 2023-10-16
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Rotronic HygroFlex HF3 Transmitters and Thermo-hygrostats User Guide
The HygroFlex HF3 series includes transmitters (HF32, HF33) and thermo-hygrostats (HF34) designed for fixed installation in HVAC applications. These devices measure temperature, relative humidity, and dew or frost point using ROTRONIC Hygromer® IN1 capacitive sensors and Pt100 RTDs. The series supports various output signals, including 4…20 mA, 0…10 V, and relay contacts, with options for duct, wall, or space mounting.
Read onlineRotronic HF3 specifications
| Measured parameters | Relative humidity, Temperature, Dew or frost point |
|---|---|
| Power supply (HF32) | 10...28 VDC |
| Power supply (HF33) | 18 to 40 VDC or 13 to 28 VAC |
| Analog output resolution | 16-bit |
All Rotronic HF3 documents by type
Day-to-day operation, settings and troubleshooting. Start here if the product is already set up.
Questions answered in these manuals
What is the minimum supply voltage for HF32 with a 500 ohm load?
The minimum supply voltage is 20 VDC.
How can the HF3 be configured to calculate dew point?
Using the ROTRONIC HW4 software, the user can configure the HF3 to calculate either the dew point or the frost point.
What is the minimum supply voltage for HF32 with a 500 ohm load?
The minimum supply voltage is 20 VDC.
From: Rotronic HF3 Transmitters and Thermo-hygrostats User Guide
Can the HF3 calculate dew point or frost point?
Yes, using the ROTRONIC HW4 software, the HF3 can be configured to calculate either the dew point or the frost point.
From: Rotronic HF3 Transmitters and Thermo-hygrostats User Guide
What is the operating temperature range for the HF3 series?
The HF3 series is designed for conditions within the range of -40 to 60 °C.
From: Rotronic HygroFlex HF3 Transmitters and Thermo-hygrostats User Guide
Which sensors are used for humidity and temperature measurement?
Humidity is measured with a ROTRONIC Hygromer® IN1 capacitive sensor, and temperature with a Pt100 RTD.
From: Rotronic HygroFlex HF3 Transmitters and Thermo-hygrostats User Guide