MAMAC Systems PR-274-R1-VDC Pressure Sensor

The MAMAC Systems PR-274-R1-VDC is a high-performance HVAC differential pressure transmitter designed for precise monitoring of building and room pressure, duct static, and filter pressure drop. Engineered with a micro-machined glass-on-silicon (Gl-Si) capacitance sensor, this unit provides superior stability and high-resolution readings even in extremely low-pressure applications. The PR-274-R1-VDC features a robust NEMA 4 enclosure, protecting internal components from dust and moisture in demanding mechanical environments.

This low pressure sensor is highly versatile for contractors, offering field selectable pressure ranges of 0-0.10" wc or -0.05" wc to 0.05" wc. The output is also field-configurable for 0-5 VDC or 0-10 VDC, ensuring seamless integration with various building automation systems. With an unregulated supply voltage range of 12-40 VDC or 12-35 VAC, the unit automatically adapts to available power sources. The MAMAC PR-274 series eliminates zero drift and calibration shifts caused by overpressure, maintaining NIST traceable accuracy across its operating range.

• Gl-Si Capacitance Technology: Ultra-stable sensor resolves pressures as low as 0.00001" wc without non-linearity issues.
• Field Selectable Flexibility: Toggle between 0-5V or 0-10V outputs and multiple pressure ranges with simple jumper adjustments.
• Durable Construction: The 18-gauge steel NEMA 4 housing ensures reliability in wash-down or outdoor environments.
• Overpressure Protection: Rated for up to 10 PSID without zero shift, preventing damage during system spikes.
• Simplified Installation: Features unpluggable screw terminals and non-interacting zero/span trimmers for fast commissioning.

How do I change the output from 0-5V to 0-10V?
The output is field-selectable via a shorting plug (jumper) on the circuit board. No recalibration is required after switching the output voltage.

Can this sensor be used for bi-directional pressure?
Yes, the PR-274-R1-VDC supports both uni-directional (0 to 0.1" wc) and bi-directional (-0.05 to +0.05" wc) ranges through internal switch configurations.

What kind of tubing is required for the pneumatic ports?
The sensor uses 3/16" OD brass fittings designed for standard 1/4" OD (5/32" ID) flexible tubing.

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.