Critical Technical Advantages
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Wireless Operation with SmartBlue: The integrated Bluetooth interface allows for full configuration and diagnostics via the SmartBlue app. This is a critical safety benefit for instruments installed in difficult-to-reach locations or hazardous areas, as it enables remote interaction without the need for specialized cables or process interruption.
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High Static Pressure Resistance: Despite measuring very small pressure differences, the PMD55B is built to withstand static line pressures up to 250 bar (3,750 psi). This robustness makes it ideal for high-pressure flow and level applications where process stability is paramount.
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Guided SIL Commissioning and Proof Testing: To reduce systematic failures, the device software includes intuitive wizards. These guides walk the user through error-free SIL commissioning and documented proof testing, ensuring that safety instrumented systems (SIS) are maintained to the highest standards with minimal effort.
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Condition-Based Maintenance: The PMD55B tracks its own health and environmental stressors. This data allows technical services to move away from rigid schedules and toward more efficient, condition-based maintenance, significantly increasing plant uptime.
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Enhanced Accuracy: With a reference accuracy of up to ±0.055%, the PMD55B provides high-precision data necessary for tight process control, mass balance calculations, and critical filter monitoring.
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User-Centric Software Design: The entire operating philosophy is designed to minimize human error. Whether through the local display or the app, intuitive menus and step-by-step instructions simplify complex tasks like setup and verification.
Technical Performance Matrix
| Feature | Details |
| Measuring Principle | Differential Pressure (Piezoresistive) |
| Sensor Type | Welded Metallic Membrane |
| Accuracy | Up to +/- 0.055% |
| Differential Pressure Range | Up to 40 bar (600 psi) |
| Static Pressure Limit | Up to 250 bar (3,750 psi) |
| Communication | 4-20 mA HART, Bluetooth |
| Operation | Local display or SmartBlue App |
Primary Applications
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Flow Measurement: Monitoring volume or mass flow in gases, vapors, and liquids in conjunction with primary elements like orifice plates or Pitot tubes.
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Level in Pressurized Vessels: Calculating liquid levels in closed tanks where high static head pressure must be accurately compensated.
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Filter and Pump Monitoring: Detecting precise pressure drops across high-pressure filtration systems to optimize replacement cycles.
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Safety Instrumented Systems (SIS): Ideal for safety loops requiring SIL-rated sensors with documented, guided proof testing procedures.
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Difficult-to-Access Points: Utilizing Bluetooth connectivity to monitor and configure instruments located on high platforms, inside enclosures, or in restricted zones.
