MAMAC Systems PR-275-R4-VDC Pressure Sensor

The MAMAC Systems PR-275-R4-VDC is a professional-grade low pressure sensor designed for precise monitoring of building automation and HVAC systems. Built with a 100% solid-state, micro-machined glass-on-silicon (Gl-Si) capacitance sensor, this unit effectively eliminates common field issues like calibration drift and non-linearity. This specific R4 configuration provides unmatched versatilely for technicians, offering multiple field selectable pressure ranges including 0-30"wc, 0-15"wc, and 0-7.5"wc, as well as bi-directional (compound) ranges from -15"wc to +15"wc.

Designed for easy panel mount installation, the chassis integrates an unpluggable screw terminal block to simplify high-density wiring within control cabinets. The VDC output is jumper-selectable for 0-5Vdc or 0-10Vdc, ensuring seamless integration with various DDC controllers. This differential pressure transmitter is fully temperature compensated and includes short-circuit and reverse-polarity protection, preventing damage from common wiring errors while maintaining NIST traceable accuracy in demanding environments.

• Multi-Range Versatility: Six field-selectable ranges (3 uni-directional, 3 bi-directional) reduce the need for carrying multiple spare parts.
• Gl-Si Sensor Technology: Ultra-stable capacitance sensor provides superior sensitivity and resistance to overpressure-induced calibration shifts.
• Flexible Power Integration: Operates on 12-40Vdc or 12-35Vac, allowing for standard 24V control circuit compatibility.
• Contractor-Friendly Design: Non-interacting zero and span trimmers allow for precise field calibration without affecting range integrity.

How do I change the output voltage on the PR-275-R4-VDC?
The output is field-selectable between 0-5Vdc and 0-10Vdc via a shorting plug (jumper) located on the circuit board. Consult the internal wiring diagram for the specific jumper position before application.

Can this sensor be used for liquid pressure monitoring?
No. The MAMAC Systems PR-275-R4-VDC is compatible only with clean, dry air or non-corrosive inert gases. It should not be used with liquids or in hazardous environments.

What is the maximum overpressure this unit can withstand?
The unit features a proof pressure of 30"wc (7.47 kPa) and a burst pressure rating of 10 psid. Exceeding these limits may cause permanent damage to the silicon diaphragm.

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.