The Yokogawa EJX130A High Static Differential Pressure Transmitter is the traditional-mount high-static differential pressure model in Yokogawa's EJX-A Series, its premium-performance line of DPharp pressure transmitters. It is designed for demanding industrial applications where accurate differential pressure measurement must be maintained under high static pressure.
The EJX130A uses a single-crystal silicon resonant sensor based on Yokogawa's DPharp technology. The sensor measures differential pressure as the primary variable while also measuring static pressure as a secondary variable. Sensor temperature information is used for compensation, helping maintain stable measurement performance when process conditions change.
The transmitter provides ±0.04% of span reference accuracy for differential pressure, with a 150 ms primary-variable response time. Its long-term stability is specified at ±0.1% of URL per 15 years, while the over-pressure effect is specified at ±0.03% of URL. The transmitter also provides 100:1 rangeability, allowing a broad range of measurement requirements to be covered with the appropriate capsule.
A major advantage of the EJX130A is its ability to operate under high static pressure. Yokogawa specifies a 4,500 psi maximum working pressure (MWP), making the transmitter particularly suitable for process lines and equipment where the static line pressure is substantially higher than the measured differential pressure.
The EJX130A can be used for liquid, gas, and steam flow measurement, as well as liquid level, density, and pressure applications. Its multi-sensing technology also provides advanced diagnostic functions that can help detect conditions such as impulse line blockage and heat-trace breakage.
The transmitter supports several communication configurations, including 4–20 mA DC with BRAIN, 4–20 mA DC with HART, HART 7, FOUNDATION Fieldbus, and PROFIBUS PA, depending on the selected model configuration. Remote setup and diagnostics can be performed through supported communication systems.
The EJX130A also uses IEC 61518 standard process connection dimensions and a universal mounting concept, helping simplify installation and replacement in process instrumentation systems.
Key Features
- High static differential pressure transmitter
- Premium-performance Yokogawa EJX-A Series
- Yokogawa DPharp single-crystal silicon resonant sensor
- Reference accuracy of ±0.04% of span
- 150 ms response time
- 100:1 rangeability
- Long-term stability of ±0.1% of URL per 15 years
- Over-pressure effect of ±0.03% of URL
- 4,500 psi maximum working pressure
- Measures differential pressure and static pressure
- Suitable for liquid, gas, and steam applications
- Flow, level, density, and pressure measurement
- Dynamic compensation for process conditions
- Advanced multi-sensing diagnostics
- Impulse line blockage detection capability
- Heat-trace breakage diagnostic capability
- Remote setup and diagnostics
- BRAIN communication option
- HART communication option
- HART 7 option
- FOUNDATION Fieldbus option
- PROFIBUS PA option
- Universal mounting design
- IEC 61518 standard process connection dimensions
- Integral indicator option
- Standard configurations, excluding Fieldbus and PROFIBUS types, certified for SIL 2 safety requirements
Measurement Span
The EJX130A is available with multiple differential pressure capsules. Current Yokogawa configuration information lists:
- M Capsule: 2 to 400 inH₂O
- H Capsule: 20 to 2,000 inH₂O
- V Capsule: 0.14 to 14 MPa / 20 to 2,000 psi
The actual measurable range depends on the selected capsule and complete model configuration.
Typical Applications
- High-static-pressure differential pressure measurement
- Flow measurement
- Steam flow measurement
- Gas flow measurement
- Liquid flow measurement
- Liquid level measurement
- Density measurement
- Process pressure monitoring
- High-pressure pipeline measurement
- Filter differential pressure monitoring
- Pump and equipment monitoring
- Oil and gas processing
- Chemical and petrochemical plants
- Power generation
- High-pressure process systems
- Industrial process control
