WNK81ma Electronic Water Pressure Sensor 0.5-4.5V 4-20mA Output -1-700Bar Range

Product Specification

WNK81ma Electronic Water Pressure Sensor for Oil Air Gas Applications

The WNK81ma Electronic Water Pressure Sensor is a high-performance piezoresistive pressure transducer engineered for precision measurement across oil, air, and gas media. Featuring dual output options (0.5-4.5V ratiometric voltage and 4-20mA current loop) and an exceptionally wide pressure range from -1 to 700 Bar, this sensor delivers outstanding versatility for industrial automation, hydraulic systems, pneumatic control, and process monitoring applications. CE and ROHS certified, the WNK81ma meets international quality and environmental compliance standards.

Key Features

• Dual Output Flexibility: Simultaneous or selectable 0.5-4.5V ratiometric output and 4-20mA two-wire current loop, providing seamless integration with both microcontroller-based systems (Arduino, ESP32) and industrial PLC/DCS controllers.
• Ultra-Wide Pressure Range: Measures from full vacuum (-1 Bar) up to 700 Bar gauge pressure, covering an extensive spectrum of industrial applications with a single sensor platform.
• Multi-Media Compatibility: Engineered for reliable operation with oil, compressed air, inert gases, and hydraulic fluids, making it ideal for hydraulic power units, pneumatic systems, and gas distribution monitoring.
• 0.5%FS High Accuracy: Delivers consistent precision with excellent long-term stability and temperature compensation across the full operating range of -40°C to 125°C.
• Rugged Stainless Steel Construction: 316L stainless steel wetted parts ensure superior corrosion resistance against aggressive oils, fuels, and industrial gases.
• CE and ROHS Certified: Manufactured to meet European safety, EMC, and environmental compliance requirements for global market access.

Technical Specifications

Applications

The WNK81ma is trusted across multiple industrial sectors for reliable pressure monitoring and control:

• Hydraulic Systems: Real-time pressure monitoring in hydraulic power units, cylinders, presses, and mobile hydraulic equipment. The 700 Bar upper range supports high-pressure hydraulic circuits.
• Pneumatic Control: Compressed air system pressure measurement for factory automation, pneumatic tool supply lines, and air compressor monitoring.
• Oil and Gas: Oil pressure sensing in lubrication systems, fuel delivery lines, and gas distribution networks. The 316L stainless steel construction withstands petroleum-based media.
• Industrial Process Control: Integration with PLC and SCADA systems for continuous pressure data acquisition in chemical processing, water treatment, and manufacturing operations.
• HVAC and Refrigeration: Refrigerant and coolant pressure measurement in chillers, heat pumps, and commercial HVAC systems.
• Test and Measurement: Laboratory and field calibration equipment, pressure decay testing, and leak detection systems requiring high precision and wide range.

Dual Output Advantage

Unlike single-output sensors, the WNK81ma offers two simultaneous output options that provide maximum system design flexibility. The 0.5-4.5V ratiometric output is ideal for battery-powered and microcontroller-based applications where low voltage operation is critical. The 4-20mA current loop output provides superior noise immunity for long cable runs in factory environments and is the industry standard for PLC analog input modules. This dual-output capability eliminates the need to stock separate sensor models for different control architectures.

Why Choose WNK81ma?

Manufactured by WNK, the WNK81ma combines precision piezoresistive sensing technology with robust industrial packaging. Every sensor undergoes rigorous factory calibration, including full-scale pressure cycling and temperature compensation verification, before shipment. The -1 to 700 Bar range covers vacuum, low-pressure, medium-pressure, and high-pressure applications in a single part number, reducing inventory complexity for OEMs and system integrators.

Our engineering team provides comprehensive technical support including wiring diagrams, application notes, and on-site commissioning guidance. Custom pressure ranges, electrical connections, and output configurations are available for volume orders. OEM and ODM services offered.

Contact us today to discuss your oil, air, or gas pressure measurement requirements and receive a tailored quotation.