MAMAC Systems HU-224-2-VDC Transducer

The MAMAC Systems HU-224-2-VDC is a high-performance duct humidity transducer engineered for precision environmental monitoring in HVAC and Building Automation Systems. Featuring a 2% humidity sensor accuracy, this unit utilizes a cross-linked bulk polymer capacitive sensing element, providing exceptional stability and resistance to contaminants. This duct mount humidity sensor is housed in a rugged 18-gauge steel NEMA 4 (IP65) enclosure, making it suitable for demanding commercial and industrial environments where moisture or dust may be present.

For maximum field flexibility, the HU-224-2-VDC offers a field selectable 0-5VDC or 0-10VDC output, allowing seamless integration with various controllers. The unit operates on a wide supply voltage range of 12-40VDC or 12-35VAC, accommodating standard 24V power systems common in mechanical rooms. Technical reliability is further enhanced by short-circuit and reverse polarity protection. When performing a MAMAC HU-224 calibration or initial setup, the unpluggable screw terminal block simplifies HVAC relative humidity transmitter wiring, ensuring a clean and efficient installation process for trade professionals.

• Precision Sensing: Delivers 2% accuracy across the 0-100% RH range with minimal hysteresis.
• Harsh Environment Ready: Gasketed NEMA 4 steel enclosure protects sensitive internal components from environmental degradation.
• Versatile Output: Easily switch between 0-5VDC and 0-10VDC output signals via onboard selection.
• Streamlined Installation: Features an unpluggable terminal block and external mounting brackets for simplified duct mount humidity sensor installation.
• Contaminant Resistance: The sensing element is engineered to withstand exposure to condensation and common airborne pollutants without losing accuracy.

How do I change the voltage output on the HU-224-2-VDC?
The output is field selectable. Techs can toggle between 0-5VDC and 0-10VDC by adjusting the configuration switches located on the internal circuit board prior to powering the unit.

What is the proper drill size for mounting this transducer in a duct?
Standard protocol for the HU-224 series requires a 5/8-inch hole to be drilled into the ductwork to accommodate the sensing probe.

Can this unit be powered by an AC transformer?
Yes, the VDC output models are compatible with 12-35VAC supply voltage. Ensure the wiring follows the specific diagrams for AC power to prevent grounding issues with the controller.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.