MAMAC Systems HU-225-3-VDC Humidity Transducer

The MAMAC Systems HU-225-3-VDC is a high-performance wall humidity transducer engineered for precision environmental monitoring in commercial and industrial building automation systems (BAS). This unit utilizes a bulk polymer capacitive sensor to deliver ±3% RH accuracy across a 0% to 100% measurement range. To ensure compatibility with diverse HVAC controllers and PLCs, it features field-selectable analog outputs, allowing technicians to toggle between 0-5 VDC and 0-10 VDC via onboard jumpers. The robust relative humidity sensor is housed in a low-profile wall enclosure designed for optimal airflow and rapid response to ambient changes. With a wide supply voltage range of 12-40 VDC or 12-35 VAC, it integrates seamlessly into existing low-voltage control circuits without requiring specialized power conditioning. This reliable HVAC humidity transmitter is essential for managing indoor air quality and preventing moisture-related equipment degradation in critical climate control applications.

Key Benefits for HVACR Applications

• Flexible System Integration: Field-selectable 0-5 VDC or 0-10 VDC output ensures compatibility with various controller brands.
• High Precision Monitoring: Provides ±3% accuracy to maintain tight tolerances in sensitive environments like cleanrooms and data centers.
• Versatile Power Options: AC/DC supply compatibility eliminates the need for dedicated DC power supplies on retrofit jobs.
• Long-Term Stability: The polymer capacitive element is designed to minimize drift and maintain calibration under high-occupancy loads.
• Simplified Installation: Standard wall-mount configuration allows for fast job site deployment and direct wiring access.

Common Questions

Can the HU-225-3-VDC be used for outdoor humidity sensing?
No, this specific model is designed for wall-mounted indoor applications. For outdoor or duct-mount requirements, the HU-224 series or specialized weather-tight enclosures should be utilized.

How do I change the output voltage scale?
The output signal is field-selectable using internal jumpers. Technicians can switch between the 0-5 VDC and 0-10 VDC scales to match the input requirements of the local DDC controller.

Does this sensor require periodic calibration?
While the bulk polymer technology is highly stable, periodic verification with a handheld hygrometer is recommended to ensure the 3% accuracy remains within spec relative to the local environment.

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.