MAMAC Systems HU-225-2-VDC Humidity Transducer

The MAMAC Systems HU-225-2-VDC is a professional-grade wall mount humidity transducer engineered for precision environmental monitoring in commercial and industrial Building Automation Systems (BAS). This unit utilizes a cross-linked bulk polymer capacitive sensing element protected by a proprietary ePTFE (expanded Teflon) filter, ensuring exceptional resistance to contaminants, smoke, and condensing humidity. Technicians can rely on the NIST traceable ±2% RH accuracy across a full 0-100% range, making it a staple for clean rooms, labs, and high-spec HVAC installations.

Installation is streamlined via field-selectable 0-5VDC or 0-10VDC outputs, adjustable via onboard dip switches to match controller requirements. The HU-225-2-VDC supports a wide voltage range of 12-40 VDC or 12-35 VAC, featuring reverse polarity and short-circuit protection to safeguard against common field wiring errors. Housed in a durable ABS enclosure designed to fit 2" x 4" handy boxes, this relative humidity sensor delivers fast response times and long-term stability without the need for frequent recalibration.

Key Benefits:

• Engineered for Harsh Environments: The teflon-protected sensor is immune to most pollutants and remains accurate even after immersion in water or exposure to fog.
• Field Versatility: Dual field-selectable VDC outputs and wide power supply compatibility reduce the need for multiple stock items on the truck.
• NIST Traceable Precision: Each MAMAC HU-225-2-VDC is individually calibrated to meet or exceed ±2% RH accuracy standards for critical climate control.
• Simplified Service: Features unpluggable screw terminal blocks and non-interacting zero/span trimmers for efficient field adjustments and maintenance.
• Universal Compatibility: Seamlessly integrates with major HVAC controllers and Energy Management Systems (EMS).

Common Questions:

Can this unit handle 24VAC power?
Yes, the HU-225-2-VDC is designed to operate on a supply voltage of 12-35 VAC or 12-40 VDC, making it compatible with standard 24VAC HVAC transformers.

Is the sensing element replaceable if it gets contaminated?
The sensing element is protected by an ePTFE filter to prevent contamination. While the sensing element is ruggedized and designed for long-term stability, the manufacturer recommends replacing the entire unit if the core sensor is physically damaged, as it is factory calibrated for precision.

How do I switch between 0-5VDC and 0-10VDC output?
Output selection is managed through onboard dip switches. This allows for immediate field configuration to match the input requirements of your specific DDC controller or monitoring device.

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.