The EJX S Series represents Yokogawa's flagship line of OpreX Pressure Transmitter, setting a new benchmark in accuracy, long-term stability, range ability, color backlit graphic display, and durability. Built on decades of proven DPharp technology and enhanced with the latest sensor innovations, the EJX S Series is designed for mission-critical applications where uncompromising performance is required.
As the pinnacle of the OpreX Pressure Transmittere family, the EJX S Series delivers exceptional measurement confidence, even in the most demanding process environments.
EJX S Series features include:
- Up to ±0.025% Accuracy
- Up to± 0.1% per 20 years Stability
- Up to 400:1 Range Ability
- Up to 3,600 psi MWP
- SIL2 / SIL3 certified
- Advanced Diagnostics as standard
- Color Backlit Graphic Display
- Support the cutting-edge communication protocol: PROFINET
Built on a Legacy of Reliability
Discover how the EJX S Series can help you maximize process reliability, optimize plant performance, and secure long-term operational excellence.
About OpreX
OpreX is the comprehensive brand for Yokogawa’s industrial automation (IA) and control business and stands for excellence in the related technology and solutions. It consists of categories and families under each category. This product belongs to the OpreX Field Instruments family that is aligned under the OpreX Measurement category.
Details
Integrated Digital Sensing
The EJX S series pressure transmitter is built on Yokogawa’s proven digital silicon resonant sensor technology, DPharp.
Dual vibrating resonators (active sensor) measure differential and static pressure directly and digitally, offering superior accuracy, repeatability, and long-term stability over traditional analog sensors.
The direct digital output eliminates analog-to-digital conversion errors and enables dynamic compensation for temperature and static pressure effects in real time, ensuring reliable performance under all operating conditions.
Smart Sensing & Connectivity
Visual Interface
The all-new graphic display provides clearer process data and diagnostic visibility, enabling operators to make accurate decisions while reducing the risk of operational errors.
Process Display
Enhanced visibility and faster interpretation of process data, ensuring operators can access critical information at a glance.
Multi Value Display
Enables clear visualization of multi-variable data for faster, more accurate decision-making.
Color-coded Alerts
When any diagnostic condition occurs, the transmitter automatically alternates between the normal process value screen and the alarm screen — ensuring immediate operator awareness.
* The image shows an example of alert display when NE107 is enabled.
Multilingual Interface
The Graphical Display supports full multilingual menus and alarm text for global usability.
One Transmitter, Many Application
Reduced CAPEX and OPEX
With multi-sensing capability, installation is simplified, hardware requirements are reduced, and lifecycle costs are lowered.
Silicon resonant sensor has the unique ability to simultaneously measure static pressure and differential pressure. Additionally, sensor and housing temperatures are also measured.
Multi-sensing platform enables real-time dynamic compensation for unmatched precision and forms the basis for implementation of advanced diagnostics.
Predictive Diagnostics
Advanced diagnosis becomes the standard spec. It will contribute plant availability by enabling predictive maintenance.
ILBD (Impulse Line Blockage Detection)
The blockage of high, low or both impulse lines can be detected by monitoring the fluctuation change of pressure.
Heat Trace Diagnosis
Flange Temperature can be calculated with the implemented temperature sensors. It provides diagnostics of heat trace or enclosure heater failures.
Fast link, Real time insight
Supporting HART and PROFINET with Ethernet APL:
PROFINET with Ethernet APL
- Real-time Communication: High-speed (10 Mbps) and low-latency cyclic communication
- Seamless & Flexible System: Utilizes existing Fieldbus communication cable with APL switch
- Easy & Reliable Operation: Supports topology detection and network redundancy for enhanced reliability
Engineering Integrity
Electric Noise Resistance
High resistance to electrical noise ensures stable measurements in electrically harsh environments, reducing signal interference, false alarms, and unplanned maintenance throughout the asset lifecycle.
EMC Conformity Standards: EN61326-1 Class A, Table2 EN61326-2-3
IEC 61326 specifies requirements for immunity and emissions regarding electro-magnetic compatibility (EMC) for electrical equipment.
Noise Resistance: EN61326, NAMUR NE21
NE21 is a guideline made by NAMUR of Germany.
It focuses specifically on process measurement equipment and EMC requirements. This is especially required by EU country.
Functional Safety Certification (IEC 61508)
EJX S series supports SIL2 as standard, Not an Option!
Silicon resonant sensor is an active pressure sensor, so even with no pressure applied the resonators oscillate at their natural frequencies. Two independent resonators are utilized. If either one or both fail, the transmitter diagnostics detects a capsule error. Silicon resonant sensor is inherently fail-safe with no undiscovered failure modes.
EJX S is capable of SIL2 single use and SIL3 redundant use, as standard. Same transmitter can be used in control and safety applications which reduces spares inventory and simplifies maintenance.
Dust-Tight and Submersible (IP66/67/68)
Designed for demanding industrial and outdoor applications, EJX S series offers IP66, IP67, and IP68 protection — ensuring complete resistance against dust, heavy water jets, and even continuous immersion. Whether exposed to rain, washdowns, or challenging field conditions, it delivers consistent, reliable performance.
| IP code | Protection level | Detail condition |
|---|---|---|
| IP6X | Protection against Dust | Dust does not get inside of enclosures. |
| IPX6 | Protection against Powerful water jets |
Test duration: 1 minute per square meter for at least 3 minutes Water volume: 100 liters per minute Pressure: 100 kPa at distance of 3 meters |
| IPX7 | Immersion, up to 1 meter depth |
Test duration: 30 minutes. Tested with the lowest point of the enclosure 1,000 mm below the surface of the water, or the highest point 150 mm below the surface, whichever is deeper. |
| IPX8 | Immersion, Up to 20 m |
Test duration: 7 days, Tested by applying water pressure equivalent to the depth of 20 m. |
Overpressure Protection
Overpressure event may occur due to incorrect operation of valve manifold or process upsets during plant start-up. EJX S series incorporate an additional overpressure diaphragm to protect the sensor from abnormal pressure surges. Yokogawa has a published overpressure specification, based on superior sensor characteristics.
Lifecycle Support for a Sustainable Future
Trusted Green
Yokogawa has established sustainability guiding principles called Trusted Green that cover Yokogawa Group products over their entire lifecycle, from Design to End of use. The EJX S series is a product that meets Yokogawa's standards based on the Yokogawa Trusted Green guidelines.
Smarter Planning With Reduced Maintenance Spares / Inventory
Ease of selection by combined or standardized specification.
- Combined Explosion protection type certification
- Combined 1/2NPT & M20 electrical connection
- SIL 2 as standard
- Range ability up to 400:1
Environment Harmonized Product
Compliance with Environmental Regulations, management of hazardous substances and reduction of environmental impact.
- EU RoHS Directive: EN IEC 63000
- REACH Statement: Regulation EC 1907/2006
- China RoHS: GB 26572
- Toxic Substances Control Act: TSCA
- Persistent Organic Pollutants (POPs)
Reduce Carbon Footprint
Eliminating paper use helps lower CO₂ emissions by 60 tons a year generated during pulp processing, printing, and distribution.
- a tangible step toward a low-carbon future.
Service and Support
By accessing from QR code attached on products, you can directly access to Customer Portal site. Customer portal site provides product information and manuals suitable for the product's hardware and communication specifications, which will contribute maintainability.
* QR Code is a registered trademark of DENSO WAVE INCORPORATED.
Life Cycle Planning
Extended warranty supports long-term asset planning.
Ease of Disposal by due to Modular designed product:
The modular design supports responsible end-of-life management by allowing quick separation of electronic boards, plastics, and metals, making disposal simpler and recycling more efficient.
Anatomy of a Pressure Transmitter
Building The Model Number
Refer to the model’s General Specifications (GS) for details
|
Model |
EJX110S | EJX310S | EJX430S | EJX510S | EJX530S |
|---|---|---|---|---|---|
|
Type |
Differential Pressure Transmitter | Absolute Pressure Transmitter | Gauge Pressure Transmitter | Absolute Pressure Transmitter (In-Line Mount) |
Gauge Pressure Transmitter (In-Line Mount) |
|
Span |
0.025 kPa to 14 MPa |
0.5 kPa abs to 16 MPa abs |
2.5 kPa to 50 MPa |
2 kPa abs to 70 MPa abs |
2 kPa to 70 MPa |
Traditional Mount
Differential Pressure Transmitters
In-Line (Screw) Mount
Gauge or Absolute Pressure Transmitters
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