MAMAC Systems PR-275-R2-MA Pressure Sensor

The MAMAC Systems PR-275-R2-MA Pressure Sensor is a high-performance low differential pressure transmitter designed for professional HVAC and building automation applications. Built around a micro-machined, glass-on-silicon (Gl-Si) capacitive sensing element, this device offers superior resolution and long-term stability, effectively eliminating common issues like zero drift and calibration shift. Its panel mount chassis and field-selectable pressure ranges—including 0-1"wc, 0-0.5"wc, and bi-directional settings—provide maximum versatility for contractors managing duct static pressure, cleanroom monitoring, or HVAC filter differential pressure measurements.

Engineered for seamless integration with BMS and industrial controllers, the PR-275-R2-MA utilizes a loop-powered 4-20mA 2-wire output with a wide supply voltage range from 12 to 40 Vdc. The 100% solid-state design ensures NIST traceable accuracy of ±1% full scale across all ranges. With short circuit and reverse polarity protection, this low range pressure transducer maintains industrial-grade reliability in demanding environments. This unit is the preferred choice for building automation systems (BAS) where precision air pressure sensing and airflow monitoring are critical.

Key Benefits for HVAC Professionals

• Field Selectable Flexibility: Offers six selectable ranges in a single unit to simplify inventory and resolve engineering selection errors on-site.
• Ultra-High Resolution: Capable of resolving pressure changes as low as 0.00001 in W.C. for critical environment control.
• Advanced Capacitance Technology: Micro-machined Gl-Si sensor provides drift-free performance and high resistance to overpressure damage.
• Simplified Installation: Features a panel mount design with unpluggable screw terminal blocks and standard 3/16" brass process connections.
• Robust Protection: Fully protected against wiring errors via short circuit and reverse polarity protection logic.

Common Questions & Answers

How do I configure the pressure range on the PR-275-R2-MA?
This sensor features an internal range select switch that allows you to choose between 0-1"wc, 0-0.5"wc, 0-0.25"wc, or bi-directional configurations like -0.125 to +0.125"wc without additional equipment.

What is the resolution of this sensor?
The MAMAC PR-275 series can resolve less than 0.00001 in W.C. (0.0025 Pa), making it suitable for high-precision cleanroom pressure monitoring.

Can I use this for liquid media?
No, this transmitter is strictly designed for non-corrosive inert gases and dry air. The wetted parts are silicone and the internal sensor is not compatible with liquids.

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.