Premium Absolute Pressure Transmitter for Critical Process Applications
The Yokogawa EJX310A is a high-performance traditional-mount absolute pressure transmitter based on Yokogawa’s proven DPharp digital sensor technology.
Designed for demanding industrial processes, the EJX310A combines high measurement accuracy, excellent long-term stability, fast response, and advanced diagnostic functions to help plants improve reliability and reduce maintenance requirements.
Unlike conventional pressure transmitters using analog sensing technology, the DPharp sensor continuously monitors its own condition, providing additional confidence in measurement reliability.
What Is an Absolute Pressure Transmitter?
An absolute pressure transmitter measures pressure relative to a perfect vacuum reference.
Unlike gauge pressure measurement, absolute pressure measurement is not affected by changes in atmospheric pressure, making it suitable for applications where accurate pressure reference is important.
Typical applications include:
- Vacuum systems
- Distillation processes
- Storage tanks
- Gas processing systems
- Chemical and petrochemical processes
DPharp Digital Sensor Technology for Higher Reliability
The core advantage of the EJX310A is Yokogawa’s DPharp resonant silicon sensor technology.
The sensor provides:
- High measurement accuracy
- Excellent repeatability
- Fast response
- Long-term stability
- Built-in sensor monitoring capability
The EJX310A uses a single crystal silicon resonant sensor designed for stable operation in demanding industrial environments.
High Accuracy and Long-Term Stability
The EJX310A is designed for applications where measurement drift can affect process efficiency or product quality.
Key performance:
- Reference accuracy: up to ±0.075% of span
- Long-term stability: ±0.2% of URL per 15 years
- Response time: 90 ms
The excellent stability helps extend calibration intervals and reduce maintenance workload over the instrument lifetime.
Advanced Diagnostics for Predictive Maintenance
The EJX310A provides intelligent diagnostic functions that help operators identify potential problems before they become failures.
Diagnostic functions include:
- Sensor health monitoring
- Real-time calculation verification
- Impulse line blockage detection
- Heat tracing failure detection
Yokogawa’s patented Back-check Technology continuously verifies internal calculations, improving confidence in transmitter operation.
Reliable Measurement for Liquid, Gas, and Steam Applications
The EJX310A can measure absolute pressure in various process media, including:
Its robust design makes it suitable for industries where pressure measurement reliability directly affects process safety and production efficiency.
Flexible Communication and Configuration
The EJX310A supports common industrial communication protocols depending on configuration:
- HART
- BRAIN
- FOUNDATION Fieldbus
- PROFIBUS PA
Digital communication allows engineers to:
- Configure parameters remotely
- Perform diagnostics
- Access device information
- Integrate with asset management systems
Designed for Safety Applications
Safety is built into the EJX-A series design.
The EJX310A supports IEC 61508 safety requirements and can be applied in:
- SIL 2 single transmitter applications
- SIL 3 redundant transmitter applications
This allows engineers to use the same transmitter platform for both standard measurement and safety-related applications.
Rugged Construction for Industrial Environments
The EJX310A is designed for long-term operation in harsh industrial environments.
Features include:
- Robust pressure containment structure
- Industrial-grade materials
- Hazardous area certifications
- Stable performance under demanding conditions
This makes it suitable for oil & gas, chemical, power, and process industries.
Key Features
- High-performance absolute pressure transmitter
- Yokogawa DPharp digital sensor technology
- Traditional mounting design
- Accuracy up to ±0.075%
- 15-year stability performance
- 90 ms response time
- Advanced self-diagnostics
- Impulse line blockage detection
- Heat tracing diagnostics
- HART communication
- FOUNDATION Fieldbus option
- PROFIBUS PA option
- SIL safety capability
- Local parameter setting (LPS)
- Hazardous area approvals available
- Suitable for liquid, gas, and steam pressure measurement
Technical Highlights
- Measurement Type: Absolute Pressure
- Sensor Technology: DPharp Single Crystal Silicon Resonant Sensor
- Accuracy: ±0.075% of span (depending on capsule)
- Stability: ±0.2% of URL per 15 years
- Response Time: 90 ms
- Output: 4–20 mA DC with digital communication
- Communication: HART / BRAIN / FOUNDATION Fieldbus / PROFIBUS PA
- Process Media: Liquid, Gas, Steam
- Safety: IEC 61508 SIL capability
Typical Applications
Vacuum and Distillation Systems
Absolute pressure measurement is critical in vacuum applications where atmospheric pressure variation cannot affect measurement accuracy.
Oil & Gas Processing
The EJX310A provides reliable pressure monitoring in demanding production and processing environments.
Chemical Industry
High stability and diagnostics help maintain consistent process operation.
Power Generation
Reliable pressure measurement supports equipment protection and efficient operation.
Storage and Gas Handling Systems
Absolute reference measurement improves accuracy in gas storage and transfer applications.
FAQ
What is the Yokogawa EJX310A?
The Yokogawa EJX310A is a high-performance traditional-mount absolute pressure transmitter using DPharp digital sensor technology for accurate and stable pressure measurement.
What is the difference between EJX310A and EJA310E?
The EJX310A is Yokogawa’s high-performance EJX-A series model, offering higher accuracy and advanced diagnostic capabilities.
The EJA310E is the standard-performance model for general industrial applications.
What does an absolute pressure transmitter measure?
An absolute pressure transmitter measures pressure relative to a vacuum reference instead of atmospheric pressure.
What is DPharp technology?
DPharp is Yokogawa’s digital pressure sensor technology using resonant silicon sensing to provide high accuracy, stability, and diagnostic capability.
What accuracy can EJX310A achieve?
The EJX310A can achieve accuracy up to ±0.075% of span depending on sensor capsule selection.
How stable is EJX310A over time?
The EJX310A provides long-term stability up to ±0.2% of URL per 15 years, helping reduce recalibration requirements.
Does EJX310A support HART communication?
Yes. HART communication is available depending on configuration.
Can EJX310A be used for safety applications?
Yes. The EJX-A series supports SIL safety applications according to configuration and certification requirements.
What industries use EJX310A?
Typical industries include oil & gas, chemical processing, power generation, and other process industries requiring reliable absolute pressure measurement.
Why choose EJX310A instead of a standard pressure transmitter?
Customers choose EJX310A when they need higher accuracy, better long-term stability, advanced diagnostics, and improved process reliability.
