Electronic Differential Pressure Technology
Revolutionary electronic differential pressure measurement eliminating traditional impulse lines for superior reliability and reduced maintenance
Compact electronic differential pressure for basic applications
Advanced electronic DP with extended diagnostics
High-end electronic DP for critical applications
Electronic differential pressure technology for diverse measurement needs
Accurate flow measurement with orifice plates, Venturi tubes, and flow nozzles
Hydrostatic level measurement in closed tanks and vessels
Real-time monitoring of filter condition for predictive maintenance
Differential pressure monitoring across pumps for efficiency and protection
Select the optimal differential pressure transmitter for your needs
| Feature | PMD70 Compact | PMD72 Advanced | PMD75 High-End |
|---|---|---|---|
| Accuracy | ±0.075% | ±0.075% | ±0.075% |
| Static Pressure | 100 bar | 420 bar | 420 bar |
| Heartbeat Technology | No | Yes | Yes |
| Safety Rating | Standard | Standard | SIL 2/3 |
| Multi-variable | No | Optional | Yes |
| Turndown | 50:1 | 100:1 | 100:1 |
| Communication | 4-20mA HART | HART, PA, FF | HART, PA, FF |
Why electronic differential pressure is the modern choice
Common questions about differential pressure measurement
Electronic Differential Pressure (EDP) in the Deltabar PMD7x series uses two separate pressure sensors with calculated differential, eliminating traditional wet/dry legs and impulse lines. This revolutionary approach prevents common issues like plugging, freezing, and leaks while providing superior accuracy and reliability.
Differential pressure measures hydrostatic pressure difference between liquid column and vapor space. The Deltabar PMD7x calculates level using ΔP = ρgh formula. The transmitter subtracts high and low pressure readings, outputting level proportional to differential.
Electronic DP eliminates impulse lines that cause 60% of DP failures. No wet/dry leg errors, freezing, or plugging issues. Installation cost reduced 50% without tubing, heat tracing, or insulation. Response time improved 10x with 100:1 rangeability.
Deltabar PMD7x achieves ±0.075% DP accuracy, translating to ±0.75% flow accuracy for orifice plates. Advanced models compensate for temperature, pressure, and Reynolds number effects for fully compensated mass flow.
Deltabar PMD7x works with all standard primary elements: orifice plates, Venturi tubes, flow nozzles, wedge meters, V-cone meters, and Pitot tubes. Each element has specific advantages for different applications.
Yes, Deltabar PMD7x excels at filter monitoring. Install with upstream high-pressure and downstream low-pressure connections. Set alarm points for filter replacement. Advanced diagnostics trend clogging rate for predictive maintenance.
Traditional DP drift results from temperature effects on oil-filled capillaries and static pressure effects. Deltabar PMD7x electronic DP eliminates most causes since sensors are individually temperature compensated with no oil-fill system.
Size DP range with normal operation at 50-70% of calibrated span for best accuracy. Consider maximum DP including startup conditions. PMD7x offers 100:1 turndown allowing wide range capability.