The EJX438A is a gauge pressure transmitter with a remote diaphragm seal. Featuring DPharp digital sensor technology, it offers the performance and device intelligence needed for greater process insight.
Details
What Are the Benefits of Gauge Pressure Transmitters?
Plants run better with Yokogawa differential pressure transmitters.
At its heart, Yokogawa's differential pressure transmitter with DPharp digital sensor offers the performance and device intelligence needed to get greater insight into your process.
Digital Performance
Yokogawa's DPharp digital sensor offers twice the performance and stability of the competitor's analog sensors. The DPharp uses the latest in IC Chip-style design and manufacturing technology. Analog sensors are based on older design technology. Although analog sensors are good, the modern DPharp sensor out performs them. A Yokogawa transmitter with DPharp digital sensor will give you the consistent, reliable, accurate measurement you need.
Poor Performance = Lost Money
Superior Design
All remote seal systems on the market use fill fluid to 'transmit' the process pressure from the remote diaphragm seal to the pressure sensor in the transmitter. The physical properties of the fill fluid change as process temperature and ambient temperature change causing the transmitter to measure inaccurately. This effect gets worse as the capillaries get longer. The key is to filter out this 'noise' to get an accurate, consistent, reliable measurement. Yokogawa has a superior design, manufacturing process, and features to reduce this 'noise'.
Signal Characterization
Signal characterization is a versatile function available on all Yokogawa pressure transmitters. The function is used to compensate the analog 4 to 20 mA output signal for non-linear applications. Such applications include tank strapping or flow measurements; but, it can be used in any application where the relationship between the pressure input and the desired output signal are known. This feature can use up to 10-points.
Greater Flexibility = Found Money
Rugged Construction
Ruggedly constructed differential pressure transmitter can help your plant reduce failures. Yokogawa's DP transmitters have construction features that are designed to allow it to outlive your plant. Four-bolt pressure retaining design, Active DPharp sensor, and dual seal certified to ANSI/ISA 12.27.01 - all design features to extend the life of the transmitter.
Ruggedness = Reliability
Inherently Safe
All Yokogawa pressure transmitters are designed and certified to IEC61508:2010 Parts 1 through 7 and IEC61511:2004 Parts 1 through 3. They are certified for single transmitter use in SIL 2 safety applications and dual transmitter use in SIL 3 safety applications with no special option required. With Yokogawa EJX-A transmitters, no longer will you have to maintain two separate inventories - one for production applications and one for safety applications.
Inherently Safe = Reliability.
Routine maintenance is easier with Yokogawa differential pressure transmitters.
Extended Calibration Intervals
Yokogawa EJX-A series pressure transmitters have a long-term stability all operational conditions. As you gain experience with these transmitters, you will be able to extend the time between calibration checks.
Quicker Maintenance = Less Downtime
Multiple Communication Options
Yokogawa offers several platforms to communicate to your transmitter.
FieldMate is a PC based communication platform that can communicate with your transmitter and manage your entire instrument inventory.
FieldMate HHC is a traditional hand-held platform that allows you to take that information into the field.
Forgot your HHC? No problem. The LPS feature on the transmitter allows you to update 9 parameters without the use of an HHC.
Quicker Maintenance = Less Downtime
EJX438A Overview
| Measurement Types | |
|---|---|
| Primary Variable | Gauge Pressure |
| Reference Accuracy | |
| Primary Variable | ±0.15% of Span |
| Response Time | |
| Primary Variable | 200 ms |
| Rangeability | |
| Primary Variable | 100:1 |
WPC101.a
EJX438A Process Connections
| Process connection Type | Size | Extension | Flange | |
|---|---|---|---|---|
 |
Flush Type | 3-inch 2-inch 1-½-inch |
N/A | JIS 10K, 20K, 40K, 63K |
| ANSI 150#, 300#, 600# | ||||
| JPI Class 150, 300, 600 | ||||
| DIN PN10/16, 25/40, 64 | ||||
 |
Extended Type | 4-inch 3-inch |
2-inch 4-inch 6-inch |
JIS 10K, 20K, 40K |
| ANSI 150#, 300# | ||||
| JPI Class 150, 300 | ||||
| DIN PN10/16, 25/40 |
EJX438A PC.a
EJX438A Capsule Ranges
Graphics not to scale.
Flushing Ring
A flushing ring a round device that is place between the diaphragm seal and the process connection. The device has two 1/4-inch ports that can be used to run a flushing solution across the face the seal to clean it. If you need a different size port, Yokogawa also offers Flushing Rings supplied by a global partner WIKA.
Communicators
Yokogawa manufactures a communicator for your needs. Yokogawa communicators are available for BRAIN Protocol, HART Protocol, FOUNDATION Fieldbus, PROFIBUS PA, ISA100, or Modbus. All out communicators are compatible with Yokogawa products as well as other products on the market.
Indicators
Yokogawa offers a range of loop powered and FOUNDATION Fieldbus remote indicators that can be used to locally monitor data from field instruments installed in difficult to access locations.
Resources
Extend your differential pressure transmitter's range with affordable isolation solutions, shielding it from extreme process temperatures and corrosive fluids.
Discover the safety features built-in to the Yokogawa digital pressure sensors (DPharp).
Downloads
Brochures
Instruction Manuals
- EJX and EJA-E Series Differential Pressure and Pressure Transmitters Installation Manual (7.2 MB)
- ManualChange22-17E : DPharp EJX Series and EJA-E Series Differential Pressure and Pressure Transmitters (192 KB)
- Manual Change 22-24E: EJX-A and EJA-E Series Differential Pressure and Pressure Transmitters (186 KB)
- *Discontinued: EJX118A, EJX438A, EJA118E, EJA438E Diaphragm Sealed Differential Pressure and Pressure Transmitter (5.1 MB)
- *Discontinued: Manual Change 21-35E-01, 23-02E and 24-03E: EJX210A/EJA210E Flange Mounted and EJX118A/EJA118E/EJX438A/EJA438E Diaphragm Sealed (898 KB)
- DPharp Fieldbus Communication Type (3.7 MB)
- DPharp HART 5/7 Communication Type (12.2 MB)
- DPharp BRAIN Communication Type (2.7 MB)
- DPharp PROFIBUS PA Communication Type (6.2 MB)
- EJX/EJA-E series NEPSI Certification[Option code: /NF2, /NF21, /NS21, /NS24 and /NS25] (720 KB)
- EJX/EJA-E Series UKEX Certification [Option code:/BF21,/BS21,/BU21,/BS26 and /BN26] (1.5 MB)
General Specifications
- *Discontinued: EJX438A Diaphragm Sealed Gauge Pressure Transmitter (2.0 MB)
- *Discontinued: EJX438A Diaphragm Sealed Gauge Pressure Transmitter (Inner Diaphragm type) (1.7 MB)
- EJX Series HART 5/HART 7 Communication (2.5 MB)
- EJX Series FOUNDATION Fieldbus Communication (1.0 MB)
- EJX Series PROFIBUS PA Communication (1013 KB)
- EJX-A Series and EJA-E Series Explosion Protected Type and Marine Certificate Type (830 KB)
Technical Information
- Functional Safety Manual (730 KB)
- Fieldbus Technical Information (1.0 MB)
- Functional Safety Manual exida Certification (436 KB)
- Diaphragm Seal Fill Fluid Specifications (451 KB)
Certificates
Engineering Tools
- EJX438A Diaphragm Sealed Pressure Transmitter(Transmitter body section) (268 KB)
- *Discontinued: EJX438A Diaphragm Sealed Pressure Transmitter(Diaphragm seal section, Flush type, No ring) (242 KB)
- CMPL - EJX-A Series Transmitter Section (261 KB)
- *Discontinued: EJX438A Diaphragm Sealed Pressure Transmitter(Diaphragm seal section, Flush type with ring) (216 KB)
- *Discontinued: EJX438A Diaphragm Sealed Pressure Transmitter(Diaphragm seal section, Extended type) (225 KB)
- 3D CAD Configurator - EJX438A
- CMPL - EJX438A (Pressure Detector Section) (237 KB)
2D/3D Configurator
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