Yokogawa EJA110E-JMS – High-Accuracy Differential Pressure Transmitter | EJA110E Series
Engineering Background
The Yokogawa EJA110E-JMS is part of Yokogawa’s flagship EJA-E Series of differential pressure and pressure transmitters, engineered for demanding process measurement applications in oil & gas, chemical, power generation, and water treatment industries. Built on Yokogawa’s proven single-crystal silicon resonant sensor technology, the EJA110E-JMS delivers exceptional long-term stability and measurement accuracy that procurement engineers and process control teams rely on for critical loop control.
Product Positioning
Designed as a direct replacement or upgrade path for legacy DP transmitters, the EJA110E-JMS combines a compact, robust housing with advanced diagnostics and HART 5/7 dual-protocol communication. It is the preferred choice for engineers specifying instruments for SIL 2 safety loops, custody transfer metering skids, and high-vibration field environments where measurement drift is unacceptable.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | EJA110E-JMS |
| Manufacturer | Yokogawa Electric Corporation |
| Series / Platform | EJA-E Series (EJA110E) |
| Measurement Type | Differential Pressure (DP) |
| Measuring Range | −0.1 kPa to 500 kPa (configurable span) |
| Accuracy | ±0.04% of calibrated span (reference conditions) |
| Long-Term Stability | ±0.1% URL / 10 years |
| Output Signal | 4–20 mA DC with HART 5 / HART 7 (superimposed) |
| Power Supply | 10.5–42 V DC (HART); 9.0–32 V DC (with lightning protector) |
| Process Connection | 1/4-18 NPT female (standard); JIS / ANSI flange optional |
| Wetted Parts Material | 316L SST diaphragm; Hastelloy C-276 optional |
| Fill Fluid | Silicone oil (standard); Fluorine oil (optional) |
| Enclosure Rating | IP67 / NEMA 4X |
| Explosion Protection | ATEX Ex ia/d IIC T4–T6; IECEx; FM; CSA |
| Safety Integrity Level | SIL 2 (IEC 61508 certified) |
| Ambient Temperature | −40°C to +85°C (standard) |
| Process Temperature | −40°C to +120°C (silicone fill) |
| Static Pressure Limit | 16 MPa (standard high-static version) |
| Vibration Resistance | 9.8 m/s² (10–60 Hz, IEC 60068-2-6) |
| Display | Optional LCD indicator (% span, engineering units, bar graph) |
| Housing Material | Aluminum alloy (standard); SUS316 SST (optional) |
| Weight | Approx. 1.34 kg (without options) |
| Warranty | 18 months from shipment |
Proven Application Environments
- Oil & Gas Upstream/Downstream: Wellhead DP measurement, separator level, pipeline flow metering via orifice plate.
- Chemical & Petrochemical: Reactor differential pressure monitoring, column level measurement, corrosive media with Hastelloy wetted parts.
- Power Generation: Boiler drum level, steam flow, feedwater DP across heat exchangers.
- Water & Wastewater: Filter differential pressure monitoring, pump head measurement, open-channel flow.
- Pharmaceutical: Clean-room differential pressure, sterile process lines with hygienic process connections.
- Pulp & Paper: Digester pressure, stock flow, bleach plant DP measurement.
Engineering Advantages
- Single-Crystal Silicon Resonant Sensor: Eliminates hysteresis and creep inherent in capacitive or strain-gauge sensors, delivering ±0.04% accuracy over the full calibrated span.
- 10-Year Stability Guarantee: ±0.1% URL drift over a decade reduces recalibration frequency and lifecycle cost — a critical factor for SIL-rated safety loops.
- Dual HART 5/7 Protocol: Backward-compatible with legacy DCS/SCADA infrastructure while supporting advanced HART 7 features including multivariable output (DP, SP, temperature, percent range).
- Advanced Self-Diagnostics: Continuous sensor health monitoring with NAMUR NE 107 status signals (Failure, Out of Specification, Maintenance Required, Function Check).
- Compact & Lightweight: 1.34 kg housing reduces impulse line stress and simplifies installation on 2-inch pipe stands or direct-mount manifolds.
- Wide Rangeability: 100:1 turndown ratio allows a single transmitter to cover multiple process ranges without hardware changes.
System Architecture & Signal Flow
The EJA110E-JMS integrates directly into standard 4–20 mA two-wire loop architectures. The process DP signal is sensed by the silicon resonant sensor capsule, converted to a frequency signal, processed by the microprocessor, and transmitted as a 4–20 mA analog signal with superimposed HART digital communication. The HART signal enables simultaneous analog control and digital configuration/diagnostics via any HART-compatible handheld communicator (e.g., Yokogawa BT200, Emerson 475) or asset management system (Yokogawa PRM, Emerson AMS).
Typical Loop Architecture: Field Instrument (EJA110E-JMS) → 2-wire shielded cable → Intrinsic Safety Barrier (if Ex ia) → DCS/PLC Analog Input Card → Control System
Sourcing & Quality Verification
- All units sourced directly from Yokogawa-authorized distribution channels or verified surplus inventory with full traceability documentation.
- Each unit undergoes incoming inspection: visual check, nameplate verification (model code, serial number, calibration date), and functional loop test at 4 mA / 20 mA endpoints.
- Calibration certificates and factory test reports available upon request for critical applications.
- Counterfeit risk mitigation: serial numbers verified against Yokogawa’s product registration database where applicable.
- Packaging inspection: original Yokogawa anti-static packaging preferred; repackaged units documented with condition report.
Procurement Process
- Confirm Model Code: Verify the full model code (EJA110E-JMS-□□□-□□/□□) matches your P&ID specification and process conditions.
- Request Quote: Contact [email protected] or call +0086 19859288691 for volume pricing, lead time, and availability confirmation.
- Submit PO: Purchase orders accepted via email. Net payment terms available for qualified accounts.
- Shipping: DHL Express / FedEx International Priority standard. EXW Xiamen, China. Export documentation (commercial invoice, packing list, CO) provided.
- After-Sales: Technical support for installation, commissioning, and HART configuration available post-delivery.
Technical FAQ
Q: What is the difference between EJA110E and EJA110A?
A: The EJA110E is the enhanced generation featuring improved accuracy (±0.04% vs ±0.065%), extended ambient temperature range, HART 7 support, and NAMUR NE 107 diagnostics. The EJA110A is the legacy model and is being phased out.
Q: Is the EJA110E-JMS SIL 2 certified?
A: Yes. The EJA110E series holds IEC 61508 SIL 2 certification for use in safety instrumented systems. A Safety Manual is available from Yokogawa for SIS loop design.
Q: Can the EJA110E-JMS be configured with a FOUNDATION Fieldbus or PROFIBUS output?
A: The -JMS suffix designates the standard 4–20 mA HART output. For FOUNDATION Fieldbus, specify the EJA110E-DAS suffix; for PROFIBUS PA, specify EJA110E-EAS.
Q: What is the maximum static pressure (line pressure) the EJA110E-JMS can withstand?
A: The standard high-static version is rated to 16 MPa (2320 psi) static pressure. Confirm the specific static pressure rating from the full model code suffix.
Q: Do you provide calibration certificates?
A: Yes. Factory calibration certificates and, where available, original Yokogawa test reports are provided upon request. Third-party NIST-traceable calibration can be arranged.
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