Description
The MAMAC Systems HU-227-3-VDC-12 is a professional-grade outside air humidity and temperature transducer engineered for reliable environmental monitoring in demanding HVAC and building automation applications. Combining dual-parameter sensing in a single rugged housing, this transducer delivers accurate relative humidity and temperature readings from outdoor installations, making it an ideal choice for economizer control, demand-controlled ventilation, and BAS integration.
Humidity Sensing
The HU-227-3-VDC-12 measures relative humidity with a ±3% accuracy rating, providing dependable data for precise HVAC control strategies. The field-selectable voltage output allows technicians to configure the transducer to match the requirements of virtually any controller or DDC system without additional signal conditioning hardware.
Temperature Sensing
An integrated 10,000 Ohm NTC thermistor (Type II) delivers accurate ambient temperature measurement alongside the humidity output. The Type II thermistor is a widely recognized standard in building automation, ensuring broad compatibility with existing controllers and BAS platforms.
Key Features & Specifications
- Application: Outside air humidity and temperature sensing
- Humidity Accuracy: ±3%
- Humidity Output: Field selectable 0–5 VDC or 0–10 VDC
- Temperature Sensor: 10,000 Ohm NTC thermistor, Type II
- Supply Voltage: 12–40 VDC / 12–35 VAC
- Dual-parameter sensing in a single enclosure
- Field-selectable output — no additional signal conditioning required
- Designed for outdoor/outside air installation
- Compatible with DDC systems and building automation controllers
Supply Voltage Flexibility
The wide supply voltage range of 12–40 VDC or 12–35 VAC allows the HU-227-3-VDC-12 to be powered from a broad variety of control panel power supplies and transformers commonly found in commercial HVAC systems, reducing installation complexity and cost.
Ideal Applications
- Outside air enthalpy and economizer control
- Demand-controlled ventilation (DCV)
- Building automation and energy management systems
- HVAC air handling unit (AHU) monitoring
- Commercial and light industrial environmental monitoring
Why Choose MAMAC Systems?
MAMAC Systems is a trusted name in HVAC sensing and transducer technology, known for producing robust, field-proven sensors that meet the rigorous demands of commercial building environments. The HU-227-3-VDC-12 reflects that commitment to quality, offering installers and controls engineers a reliable, easy-to-configure solution for outside air monitoring.
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