Description
The MAMAC Systems HU-227-2-MA-12 is a precision-engineered outside air humidity and temperature transducer designed for demanding building automation and HVAC control applications. Combining dual-parameter sensing in a single rugged housing, this transducer delivers reliable outdoor environmental data to BAS controllers, DDC systems, and energy management platforms.
Humidity Sensing
The HU-227-2-MA-12 measures relative humidity with a ±2% accuracy rating, making it well-suited for critical ventilation control, economizer management, and outdoor air monitoring. The 4-20mA two-wire output provides a robust, noise-resistant signal ideal for long cable runs common in outdoor installations.
Temperature Sensing
Integrated temperature measurement is accomplished via a 10,000 Ohm NTC thermistor (Type II), a widely compatible sensor type supported by virtually all major DDC controllers and building automation systems. This allows simultaneous outdoor temperature monitoring without the need for a separate sensor.
Key Features & Specifications
- Measurement: Outside air relative humidity and temperature
- Humidity Accuracy: ±2%
- Humidity Output: 4-20mA, 2-wire
- Temperature Sensor: 10,000 Ohm NTC thermistor (Type II)
- Supply Voltage: 12–40Vdc
- Application: Outdoor / outside air environments
- Compatible with DDC, BAS, and energy management systems
Applications
- Outside air enthalpy and economizer control
- Building automation system (BAS) outdoor sensing
- Demand-controlled ventilation (DCV)
- Energy management and monitoring
- Commercial HVAC outdoor air quality measurement
Why Choose the MAMAC HU-227-2-MA-12?
MAMAC Systems is a trusted name in commercial building controls, known for durable, accurate sensing solutions. The wide 12–40Vdc supply voltage range provides installation flexibility across a variety of control panel configurations. The 4-20mA current loop output ensures signal integrity over long wire runs, while the Type II NTC thermistor ensures broad controller compatibility right out of the box.
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