Reliable Absolute Pressure Transmitter for Industrial Process Applications

The Yokogawa EJA310E is a traditional-mount absolute pressure transmitter designed for reliable pressure measurement in industrial process environments.

As part of Yokogawa’s proven EJA-E series, the EJA310E combines the rugged reliability of the EJA platform with advanced DPharp digital sensor technology to provide accurate measurement, device intelligence, and long-term operational stability.

The transmitter is suitable for measuring absolute pressure of liquids, gases, and steam in industries where measurement reliability and reduced maintenance requirements are important.

Accurate Absolute Pressure Measurement with DPharp Technology

The EJA310E uses Yokogawa’s DPharp digital sensor technology.

Compared with traditional analog pressure sensors, DPharp technology directly processes the sensor signal digitally, helping reduce measurement errors and improve overall transmitter performance.

Benefits include:

• Stable pressure measurement
• Excellent repeatability
• Fast response
• Reduced influence from environmental changes
• Built-in diagnostic capability

Stable Performance Over Long Operating Periods

For industrial plants, transmitter drift can increase maintenance workload and affect process performance.

The EJA310E provides:

• Accuracy up to ±0.1% of span
• Long-term stability up to ±0.2% of URL per 10 years
• 90 ms response time

This long-term stability helps extend calibration intervals and reduce unnecessary maintenance activities.

Designed for Absolute Pressure Applications

Absolute pressure measurement uses a vacuum reference instead of atmospheric pressure.

The EJA310E is suitable for applications where atmospheric pressure variation should not affect measurement accuracy, including:

• Vacuum systems
• Distillation equipment
• Gas processing
• Storage tanks
• Process vessels

Advanced Diagnostics Improve Plant Availability

The EJA310E includes intelligent diagnostic functions based on Yokogawa DPharp technology.

Diagnostic features help users:

• Monitor transmitter condition
• Identify abnormal operation
• Reduce unexpected maintenance
• Improve process availability

Yokogawa’s Back-check Technology continuously verifies internal calculations to improve measurement reliability.

Reliable Construction for Harsh Industrial Environments

The EJA310E is designed for long-term industrial operation.

Key construction features include:

• Four-bolt pressure retaining structure
• 316L stainless steel wetted components
• Dual seal design certified to ANSI/ISA 12.27.01

These features improve durability and help reduce failures caused by demanding process conditions.

Multiple Communication Options

The EJA310E supports various industrial communication protocols depending on configuration:

• HART 5/HART 7
• FOUNDATION Fieldbus
• PROFIBUS PA
• BRAIN
• Low Power 1–5 VDC with HART 7

Digital communication enables easier commissioning, remote configuration, and integration into modern control systems.

Safety Capability for Process Applications

Safety is integrated into the EJA-E series design.

The EJA310E supports:

• SIL 2 single transmitter applications
• SIL 3 redundant transmitter applications

This allows the same transmitter platform to be used for both process measurement and safety-related applications, helping simplify inventory management.

Key Features

• Traditional-mount absolute pressure transmitter
• Yokogawa DPharp digital sensor technology
• Accuracy up to ±0.1%
• Long-term stability up to ±0.2% URL per 10 years
• 90 ms response time
• Advanced self-diagnostics
• Back-check Technology
• HART 5/HART 7 communication
• FOUNDATION Fieldbus option
• PROFIBUS PA option
• BRAIN protocol option
• SIL 2/3 safety capability
• Local Parameter Setting (LPS)
• Rugged industrial construction
• Suitable for liquid, gas, and steam measurement

Technical Highlights

• Measurement Type: Absolute Pressure
• Sensor Technology: DPharp Single Crystal Silicon Resonant Sensor
• Accuracy: Up to ±0.1% of span
• Stability: ±0.2% of URL per 10 years
• Response Time: 90 ms
• Output: 4–20 mA DC with digital communication
• Communication: HART / FOUNDATION Fieldbus / PROFIBUS PA / BRAIN
• Maximum Over Pressure: Up to 3,600 psia depending on configuration
• Process Media: Liquid, Gas, Steam
• Safety: SIL capability

Typical Applications

Vacuum and Distillation Processes

Absolute pressure measurement helps maintain accurate control in vacuum-related processes.

Chemical Processing

Stable pressure measurement supports consistent production quality.

Oil & Gas Systems

Reliable operation helps monitor process equipment under demanding conditions.

Power Generation

The transmitter supports pressure monitoring in steam and auxiliary systems.

Storage and Process Vessels

Absolute reference measurement improves pressure monitoring accuracy.

FAQ

What is the Yokogawa EJA310E?

The Yokogawa EJA310E is a traditional-mount absolute pressure transmitter using DPharp digital sensor technology for accurate and stable measurement of liquid, gas, and steam pressure.

What is the difference between EJA310E and EJX310A?

The EJA310E is the standard high-performance model in the EJA-E series, while the EJX310A belongs to the higher-performance EJX-A series with enhanced specifications and advanced performance features.

What does an absolute pressure transmitter measure?

An absolute pressure transmitter measures pressure relative to a perfect vacuum reference rather than atmospheric pressure.

What is DPharp technology?

DPharp is Yokogawa’s digital pressure sensing technology using a resonant silicon sensor to provide accurate and stable pressure measurement.

What accuracy does EJA310E provide?

The EJA310E provides accuracy up to ±0.1% of span depending on the selected capsule configuration.

How stable is EJA310E over time?

The EJA310E provides long-term stability up to ±0.2% of URL per 10 years.

Does EJA310E support HART communication?

Yes. HART 5/HART 7 communication is available depending on configuration.

Can EJA310E be used for safety applications?

Yes. The EJA310E supports SIL safety applications according to configuration and certification requirements.

What industries use EJA310E?

Typical applications include chemical, oil & gas, power generation, water treatment, and general process industries.

Why choose EJA310E instead of a basic pressure transmitter?

Customers choose EJA310E for its proven DPharp technology, stable performance, diagnostics, safety capability, and reduced maintenance requirements.