Do you need to measure the difference between two pressures with absolute confidence? Whether monitoring filter health, calculating DP flow across an orifice plate, or determining closed tank level, a reliable differential pressure (DP) measurement is fundamental to process control and safety. Yokogawa's differential pressure transmitters leverage advanced digital DPharp sensor technology to deliver precise, stable readings by comparing high-side and low-side process pressures, ensuring data integrity for your most critical applications.

Why Choose Yokogawa Differential Pressure Transmitters? Solving Drift, Response & Application Challenges

Achieve unwavering confidence in your pressure monitoring with intelligent features that directly address common industrial pain points.

• Eliminate Measurement Drift for Critical Processes: Stop guessing if your data has shifted. The core of these instruments is the digital DPharp sensor, renowned for its exceptional long-term stability. Depending on the series, you can expect ±0.1% of URL stability for up to 15 years, drastically reducing unplanned recalibrations and providing unwavering confidence in long-term data trends for applications like custody transfer DP flow or reactor level.

• Capture Process Dynamics with High-Speed Response: Don't let lagging data mask dangerous pressure transients. With a rapid response time of 90 milliseconds, these transmitters capture pressure fluctuations instantly. Combined with high accuracy options up to ±0.025%, you get a complete picture of your process dynamics, enabling tighter control and improved safety for applications such as filter monitoring where rapid pressure build-up indicates clogging.

• Versatile Solutions for Complex Applications: One size rarely fits all in process measurement. Yokogawa offers a comprehensive family of DP transmitters to match your exact needs. From standard EJA110E models for general purpose use, to high static pressure variants (EJA130E/EJX130A) , draft range models (EJA120E/EJX120A) for ultra-low pressures, and even Digital Remote Sensor (DRS) systems (EJXC40A) for remote differential pressure measurements where traditional impulse lines are impractical.

Key Features for Demanding Industrial Applications

Engineered for longevity, precision, and safety:

• Proven Sensor Technology: The DPharp digital sensor is the industry standard for reliability, using advanced silicon resonant sensor technology to provide exceptional accuracy and repeatability over a wide range of static pressures and temperatures.

• Multi-Sensing Capability: High-performance EJX-A Series models can measure not only differential pressure but also static pressure simultaneously, providing additional process insights without extra hardware.

• Flexible Mounting & Seal Options: Choose the configuration that fits your installation. Available with traditional-mount for manifolds, direct mount seals for hygienic or corrosive applications, and diaphragm seal systems for challenging process fluids.

• Inherent Safety & Reliability: Designed for critical applications, these transmitters are backed by FMEDA reports and IEC 61508 certification for SIL 2 applications, ensuring they meet the highest functional safety standards.

Technical Specifications at a Glance

Measurement Principle & Performance

• Measurement Type: Differential Pressure (measures difference between high-side and low-side pressures)

• Sensor Technology: Digital DPharp (Silicon Resonant Sensor)

• Typical Applications: Closed tank level, density, filter health monitoring, DP flow (primary element required separately), liquid interface detection

• Can Function As: Gauge Pressure Transmitter (if low-side port is left open to atmosphere)

• Accuracy (Available Options):

• ±0.025% of Span (High Performance EJX-A Series)

• ±0.040% of Span

• ±0.055% of Span (Standard EJA-E Series)

• Long-Term Stability:

• Up to ±0.1% of URL per 15 years (EJX-A Series High Performance)

• ±0.1% of URL per 10 years (EJA-E Series Standard)

• Response Time: 90 msec (standard)

Model Series & Special Applications

Yokogawa offers a comprehensive range to match any requirement:

Functional Safety & Compliance

• Safety Certification: IEC 61508 certified for use in SIL 2 safety instrumented functions

• Documentation: FMEDA reports available for safety lifecycle calculations

• Quality Conformance: Manufactured to rigorous standards ensuring specification compliance

Outputs & Communication

• Analog Output: 4-20 mA HART (standard on most models)

• Digital Protocols: FOUNDATION Fieldbus, PROFIBUS PA (available options)

• Local Indication: Optional digital indicator for on-site reading

Ready to Optimize Your DP Flow, Level, or Filter Monitoring?

Whether you are measuring a critical reactor level or monitoring filter pressure drop, Yokogawa's differential pressure transmitters deliver the precision and reliability you need.