MAMAC Systems PR-275-R3-MA Pressure Sensor

The MAMAC Systems PR-275-R3-MA is a high-performance low pressure sensor engineered for critical building automation and HVACR control. Utilizing a 100% solid-state, micro-machined glass-on-silicon (Gl-Si) capacitance sensor, this unit delivers ultra-stable measurement by eliminating common issues like zero drift and calibration shifts caused by overpressure. As a field selectable pressure sensor, it provides six distinct ranges—0-5"wc, 0-2.5"wc, 0-1.25"wc, ±2.5"wc, ±1.25"wc, and ±0.625"wc—allowing technicians to configure the differential pressure transmitter on-site to match specific application demands. The 2-wire 4-20mA output ensures seamless integration with standard industrial controllers, while the 12-40VDC supply voltage range accommodates various power configurations. Housed in a rugged panel mount chassis, this industrial pressure transducer is built for space-efficient installation within control cabinets, providing ±1% full-scale accuracy for monitoring cleanroom pressure, duct static, or filter status without the need for extensive spare parts inventory.

Key Benefits:

• Reduced Inventory: Six field-selectable ranges in a single unit eliminate the need to stock multiple fixed-range sensors.
• Gl-Si Technology: Professional-grade glass-on-silicon capacitance sensing prevents non-linearity and calibration shift over time.
• Circuit Safety: Integrated reverse polarity and short-circuit protection shield the unit from common wiring errors during commissioning.
• Maintenance Efficiency: Non-interacting zero and span trimmers allow for precise field calibration without the settings affecting each other.
• Simplified Integration: Industry-standard 4-20mA output provides reliable signal transmission over long distances in commercial environments.

Common Questions:

How do I configure the pressure range on the PR-275-R3-MA?
Technicians can select the desired range using the internal DIP switches or jumpers. This allows for both unidirectional and bidirectional (compound) measurement ranges up to 5.0"wc.

Can this sensor handle overpressure without damage?
Yes, the micro-machined sensor is designed to withstand overpressure up to 10 PSID without suffering a permanent zero shift, ensuring long-term reliability in varying duct pressures.

Is this unit suitable for outdoor installation?
This specific model features a panel mount chassis intended for installation inside a protected control panel. For outdoor or wash-down environments, a NEMA 4/IP65 rated enclosure would be required.

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.