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  • Data Loggers
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  • Torque Transducers
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Rotronic

HygroFlex HF3A Wall Mount Transmitter
Home / Our Brands / Rotronic / HygroFlex Transmitters / HygroFlex HF3 Transmitters / HygroFlex HF3A Transmitter / HygroFlex HF3A Wall Mount Transmitter

HygroFlex HF3A Wall Mount Transmitter

HF3A Wall Mounted Transmitter is engineered for fixed indoor installations where precise ambient climate monitoring is critical. Featuring a compact, rigid probe mounted directly to the bottom of the enclosure, this variant provides reliable relative humidity and temperature mapping for open-air rooms, manufacturing spaces, and controlled environments.

Equipped with the next-generation Rotronic HygroMer® HT-1 sensor, the wall mount version delivers stable, long-term performance and rapid response profiles.

Key Features

  • Enclosure Rating: Industrial polycarbonate (PC-ABS) housing rated to IP65 for robust protection against dust and ambient moisture.
  • Wall-Specific Range: The fixed probe measures from -40 to 85 °C and 0 to 100 %RH (Note: limited to -10 to 60 °C if configured with a local LCD screen due to heat dissipation near the electronics).
  • System Accuracy: Delivers exceptional factory-calibrated precision of ±1.2 %RH and ±0.1 K at 23 °C.
  • Next-Gen Connectivity: Includes a built-in NFC (Near Field Communication) interface, allowing touchless configuration, adjustment, and updates via smartphone or PC—completely powerless

To simplify project procurement, the HF3A wall mount is offered in 6 standard configurations. These models combine two display profiles with three optimised wiring and telemetry options:

1. Choose Your Interface & Display Option
  • No Display (Standard Front): A clean, blind front faceplate featuring an intuitive, multi-colour status LED that indicates system health, warning, or error states at a glance.
  • Backlit LCD Display: A high-contrast graphic display that outputs live temperature and humidity metrics, with built-in dew point calculation natively mapped on-screen.
2. Choose Your Wiring & Output Topology
  • 2-Wire Loop Powered (HF3A-2): A space-saving, loop-powered build utilising a standard, fixed $4\dots20\text{ mA}$ analogue loop.
  • 3/4-Wire Active Analogue (HF3A-3): An actively powered circuit offering flexible, fully adjustable $4\dots20\text{ mA}$ analogue outputs (can also be field-scaled to voltage outputs like $0\dots10\text{ V}$ via software).
  • 3/4-Wire Digital + Analogue (HF3A-D): The premium integration model, adding native Modbus RTU over RS485 digital communications alongside parallel 4-20 mA analogue loop signals.

Customisation Notice: Any physical or electrical configurations deviating from these 6 stock models (such as custom scaling, alternative voltage defaults, or specialised filters) are subject to a Minimum Order Quantity (MOQ) of 20 units and are available on request. Please reach out to our sales team for custom project specifications.

Applications

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Frequently Asked Questions

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Omni Instruments Ltd,
Unit 1, 14 Nobel Road,
Wester Gourdie Industrial Estate,
Dundee, DD2 4UH, UK

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