MAMAC Systems HU-226-2-MA-3 Transducer

The MAMAC Systems HU-226-2-MA-3 is a professional-grade duct humidity and temperature transducer engineered for high-performance monitoring in HVAC and Building Automation Systems (BAS). This unit features a cross-linked bulk polymer capacitive sensing element that provides ±2% RH accuracy across a 0-100% range, while an integrated 1,000 Ohm Platinum RTD delivers precise temperature data with ±0.12% accuracy at 0°C. Designed for industrial longevity, the sensing probe is protected by a proprietary hydrophobic ePTFE filter, making it immune to contaminants, condensation, and salt air. The 4-20mA 2-wire output ensures reliable signal transmission over long distances with high noise immunity. Housed in a NEMA 4 (IP-65) powder-coated steel enclosure with unpluggable terminal blocks, this duct mount sensor facilitates rapid field installation and steady performance in demanding commercial air handling environments.

• Environmental Resilience: The Teflon-protected sensor withstands 100% saturation and can be cleaned with isopropyl alcohol without losing calibration.
• Wide Power Compatibility: Operates on a flexible 12-40 VDC supply voltage, integrating seamlessly with diverse DDC controllers and recorders.
• Precision Thermal Sensing: Utilizes a 1K Ohm Platinum RTD (DIN 43760) for linear temperature feedback with negligible hysteresis.
• Maintenance-Friendly Design: Features an unpluggable screw terminal block and easily accessible zero/span trimmers for efficient field commissioning.
• NIST Traceable Accuracy: Each unit is individually calibrated in an environmental test chamber to ensure certified performance standards.

Common Questions

How does this unit handle high-humidity environments?
The MAMAC HU-226-2-MA-3 is specifically designed for harsh conditions. Its polymer capacitive sensor is protected by an ePTFE filter that prevents water droplets and contaminants from reaching the sensing element, allowing it to recover quickly from 100% saturation.

What are the wiring requirements for the 4-20mA loop?
This is a two-wire humidity transmitter. The 4-20mA signal is loop-powered, typically requiring a 24 VDC source. For the temperature component, the 1,000 Ohm RTD is a passive resistance output that connects directly to the thermistor/RTD input of your controller.

Can the sensor be used in outdoor air intakes?
Yes. With its NEMA 4 (IP-65) enclosure and rugged aluminum probe, this duct transducer is suitable for outdoor air monitoring, provided the enclosure is shielded from direct rain and the temperature remains within the -30°F to 130°F operating range.

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.