Rotronic
HF5A (HygroFlex Advanced) — High-Precision Humidity, Temperature & Dew Point Transmitter
Advanced climate measurement with flexible probe compatibility and modern connectivity
When accuracy, reliability and flexibility are essential, the Rotronic HF5A (HygroFlex Advanced) transmitter delivers precise humidity, temperature and dew point data — even in demanding industrial, laboratory and cleanroom environments.
The HF5A combines Swiss precision engineering, digital probe technology and modern communication interfaces to ensure consistent performance and easy integration into any control or monitoring system.
Technology and Design
The HF5A builds on Rotronic’s proven HygroFlex platform and uses the latest AirChip3000™ technology for high measurement accuracy, long-term stability and advanced diagnostics.
It supports a wide range of digital probes — including HC2A and RMS probes — enabling measurement of:
- Relative humidity and temperature
- Dew point and psychrometric parameters
- Differential pressure and CO₂ (with compatible RMS probes)
The housing is designed for industrial reliability with:
- Temperature range: –40…70 °C
- Humidity range: 0–100 % RH
- Robust IP65 protection class
Smart Features
- NFC configuration: Easy setup and firmware updates using any NFC-enabled device — even when unpowered
- LED status indicator: Clear visual feedback for operation, simulation and fault states
- Namur NE43 compliance: Standardized fault signalling for process systems (HF5A-21)
- Digital AirChip3000 diagnostics: Automatic sensor status, self-monitoring and compensation
- Multi-parameter output: RH, T, dew point, wet-bulb, enthalpy and more
- Modular design: Interchangeable probes and configurable analog/digital outputs
- Output options: Analog (mA/V), RS-485 (Modbus RTU), or Ethernet on selected models
Product Features
- Interchangeable digital probes — use the same transmitter with different probe types (humidity & temperature, differential pressure, etc.)
- Multiple wiring options — from loop-powered 2-wire to full digital 3/4-wire connectivity
- Modern connectivity — RS485 / Modbus and optional Ethernet with digital communication
- NFC configuration — simplifies commissioning and reduces setup errors
- Robust housing — suitable for industrial conditions (electronics range –40…70 °C, humidity 0…100 %)
- Psychrometric outputs — dew point, wet-bulb, enthalpy and more
- Wide compatibility — supports HygroClip2 and RMS digital probes for broad application coverage
Designed for Your Applications
Rotronic HF5A serves industries where reliable environmental parameters are essential:
- HVAC & Building Automation — precise control of indoor climate and air quality
- Pharmaceutical & Cleanrooms — compliant, reproducible environmental control
- Food & Beverage — humidity regulation in production and storage areas
- Industrial Processes — controlled atmospheres for coatings, printing, textiles
- Environmental Monitoring — long-term, stable measurement networks
- Data Centers & Critical Facilities — accurate microclimate monitoring for reliability
This transmitter’s flexible wiring, probe compatibility and powerful outputs make it easy to integrate with PLCs, DAQs, SCADA systems and cloud platforms, enabling smart monitoring and advanced automation strategies.
Benefits You Get
- High accuracy and stability — data you can trust over time with minimal drift
- Low maintenance — modular probes reduce service time and spare parts
- Flexible connectivity — analog, digital and NFC configuration simplify integration
- Multi-parameter support — humidity, temperature, dew point and more from one transmitter
- Enhanced diagnostics — LED feedback, fault detection and peer-to-peer network interfaces
These products are used within these applications
Air Monitoring
Efficient Air Monitoring Solutions for Healthier Environments. In today’s world, maintaining clean and healthy air is essential for both indoor and outdoor environments.