MAMAC Systems PR-274-R2-VDC Pressure Sensor

The MAMAC Systems PR-274-R2-VDC is a high-precision low pressure sensor engineered for demanding HVAC duct static pressure monitoring and cleanroom applications. Built with a micro-machined glass-on-silicon (Gl-Si) capacitance sensor, this unit provides unmatched stability and eliminates the common industry issues of zero drift and calibration shift caused by overpressure. As a differential pressure transducer, it features up to six field selectable pressure ranges, including 0-1"wc, 0-0.5"wc, and 0-0.25"wc, as well as bi-directional compound ranges like -0.125"wc to +0.125"wc. This versatility allows technicians to standardize on a single part for multiple building automation systems requirements.

Housed in a rugged NEMA 4 enclosure (IP-65), the PR-274-R2-VDC is designed for environmental resilience. The field selectable VDC output (0-5Vdc or 0-10Vdc) ensures seamless integration with diverse controllers, while the wide supply voltage range (12-40Vdc / 12-35Vac) simplifies power landing. With NIST traceable calibration and non-interacting zero and span trimmers, this air pressure transmitter delivers +/- 1.0% FS accuracy, making it the professional choice for monitoring filter pressure drops and VAV box performance.

• Gl-Si Capacitance Technology: Provides superior stability and resists overpressure zero shift up to 10 PSID, outperforming standard silicon sensors.
• Field Flexibility: 100% field selectable ranges and outputs reduce inventory needs and simplify on-site configuration for HVAC sensors.
• Rugged Construction: The 18-gauge steel NEMA 4 enclosure protects sensitive electronics from dust and moisture in mechanical rooms or rooftops.
• Installation Efficiency: Features unpluggable screw terminal blocks and non-interacting trimmers for rapid differential pressure sensor commissioning.

Can the PR-274-R2-VDC handle bi-directional pressure?
Yes, this model supports multiple bi-directional ranges including -0.05 to +0.05"wc, -0.25 to +0.25"wc, and -0.125 to +0.125"wc, ideal for building static pressure control.

Is the power supply polarity sensitive?
While the 12-40Vdc supply is standard, the unit features short circuit and reverse polarity protection to prevent damage during field wiring errors.

Does this sensor require re-calibration after range selection?
No, the PR-274 series utilizes sophisticated integrated circuits that maintain NIST traceable accuracy across all selectable ranges without the need for manual recalibration.

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.