MAMAC Systems HU-226-3-VDC-17 Transducer

The MAMAC Systems HU-226-3-VDC-17 is a heavy-duty duct humidity and temperature transducer engineered for precision monitoring in commercial HVAC and building automation systems. This unit features a high-stability cross-linked polymer capacitive humidity sensor providing 3% accuracy across a 0-100% RH range. For simultaneous temperature tracking, it is equipped with a 20,000 Ohm NTC thermistor, ensuring compatibility with a wide array of BAS and energy management controllers. Designed for contractors working in demanding environments, the HU-226-3-VDC-17 utilizes a field-selectable 0-5VDC or 0-10VDC output to simplify integration and minimize on-site stock requirements. The internal electronics are housed in a rugged NEMA 4 (IP65) powder-coated steel enclosure, protected further by an ePTFE hydrophobic/oleophobic filter that prevents sensor degradation from condensation, airborne contaminants, or high-velocity duct airflow. With a wide supply voltage range of 12-40VDC or 12-35VAC, this NIST traceable transducer delivers reliable relative humidity (RH) sensing and temperature data over a broad -30°F to 130°F operating spectrum.

• Universal Controller Compatibility: The field-selectable analog output allows for easy 0-5VDC or 0-10VDC configuration via internal jumpers to match any DDC system requirements.
• Superior Environmental Protection: The NEMA 4 steel housing and specialized Teflon sensor filter ensure long-term stability in high-humidity or industrial duct applications.
• Dual-Function Sensing: Combines a 3% accuracy RH sensor and a 20K Ohm NTC thermistor into a single duct penetration, reducing installation labor and material costs.
• Robust Power Handling: Wide AC/DC supply voltage range provides flexibility when wiring to various HVAC control transformers and power supplies.

Can the HU-226-3-VDC-17 be used in outdoor air intakes?
Yes, the NEMA 4 enclosure and hydrophobic filter are specifically designed to handle moisture, fog, and contaminants typical of outdoor air or high-condensation environments.

How do I change the voltage output?
The output is field-selectable. You can toggle between 0-5VDC and 0-10VDC by adjusting the internal jumper settings during commissioning to match your analog input configuration.

Is the temperature sensor compatible with my BAS?
This model features a standard 20,000 Ohm NTC thermistor. Always verify that your controller's input curve supports 20K NTC resistance values before installation.

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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.