Endress+Hauser Deltabar M PMD55-DJU4/247 Pressure Transmitter

Endress+Hauser Deltabar M PMD55-DJU4/247 Differential Pressure Transmitter

The Endress+Hauser Deltabar M PMD55-DJU4/247 is a high-performance, premium-grade digital differential pressure transmitter designed for precision, long-term stability, and strong operating endurance. The transmitter incorporates a state-of-the-art piezoresistive sensor element and a rugged all-welded metallic process-isolating diaphragm. This transmitter is designed for precise calculation of differential pressure data in a wide range of challenging settings.

Model Details:

• Brand: Endress+Hauser
• Product Line: Deltabar M Series
• Full Model Code: PMD55-DJU4/247
• MPN: PMD55-DJU4/247
• Condition: New
• Country of Origin: Germany

Technical Specifications

Marine and Industrial Applications

1. Exhaust Gas Scrubber System Regulation: Monitoring pressure gradients inside exhaust lines and scrubbers to keep regulatory environmental tracking.
2. Monitoring hydrostatic column parameters in deep ballast tanks, heavy fuel oil (HFO) storage tanks and expansion containers with static overhead vapour pressures.Closed Cargo & Settling Tank Level Systems
3. High-Volume Main Flow In-Line Metrics Partnering with fundamental elements such restriction orifice plates, pitot tubes or venturi tubes to check real-time mass/volume flow indices of fuel, feed water or high-pressure steam lines.
4. Machinery Space Filter Differential Monitoring: Continuous monitoring of pressure decrease across primary lube oil filters, fuel oil duplex strainers and central air conditioning filtration banks to discover clogging before a low pressure trip occurs.
5. Centrifugal Pump Protection: Measures delta pressure across suction and discharge lines in real-time to prevent against cavitation, dry running and impeller damage.

Engineer’s Insight:

The Deltabar M PMD55 utilizes a classic internal piezoresistive sensor module isolated behind dual metal membranes. When uneven process forces press against the positive (+) and negative (-) low-pressure sides, the internal fill fluid transfers this mechanical displacement directly onto a silicon control bridge. The resulting change in electrical resistance is translated by the internal electronics chip into a highly linear 4-20 mA current output that is proportional to the raw pressure differential.

Maintenance Tips:

-> Manifold Block Integrity: Always use this transmitter in combination with a regular 3 or 5 valve bypass manifold block. When isolating the transmitter for calibration checks or system zero modifications, always open the balancing equalising valve prior to closing the process isolation taps. This approach prevents smashing the interior diaphragm with harmful one sided overpressure surges.

-> Counteracting Shipboard Vibration: In areas subject to significant structural vibration (such as near primary propulsion engines or large auxiliary generator frames), consider distant wall-mounting utilising a conventional 2-inch pipe bracket. Connect the remote body back to the main flow line with flexible high-pressure impulse tubing. This isolates the internal electrical components from high frequency mechanical damage.