Rotronic HF3A High Accuracy Humidity & Temperature Transmitter
HF3A
Rotronic
The Rotronic HF3A is a high‑accuracy humidity and temperature transmitter designed for HVAC, pharma, food, and industrial environments. With Swiss‑engineered precision, robust IP65 housing, and versatile mounting options, it ensures reliable monitoring and long‑term stability.

High Accuracy Measurement: ±1.2 %RH and ±0.1 °C at 23 °C for precise environmental monitoring.
Versatile Applications: Ideal for HVAC systems, cleanrooms, greenhouses, swimming pools, libraries, and industrial manufacturing.
Multiple Versions: Available in wall, duct, and cable mount designs to suit diverse installation needs.
Advanced Features:
Trend indicator and LED status display with backlighting
Psychrometric calculations for advanced monitoring
Freely programmable outputs via NFC interface
RS‑485 digital communication and scalable analog outputs (0–10 V, 4–20 mA)Durability: Industrial‑quality PC‑ABS housing with IP65 protection for harsh environments.
Sensors: Equipped with Rotronic Hygromer® HT‑1 humidity sensor and Pt100 Class B temperature sensor.
Compliance: CE conformity, RoHS compliant, and GAMP5 standards.
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