Yokogawa EJA110E-JMS Differential Pressure Transmitter – Obsolete EJA Series Spare Part

Technical Dossier

Product Details And Specifications

Yokogawa EJA110E-JMS Differential Pressure Transmitter – Obsolete EJA Series Spare Part

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Note: Electrical parameters listed reflect standard EJA110E-series specifications. Suffix-specific configurations (JMS) relate to process connection and manifold options. Parameters not confirmed by physical inspection are not listed. Accuracy of electrical data is critical for safe installation — do not substitute unverified specifications.

Solving the Discontinued Hardware Crisis

The EJA110E series was Yokogawa's workhorse DP transmitter for over a decade. It was deployed in refineries, chemical plants, power generation facilities, and pulp and paper mills across Asia, Europe, and the Americas — often in the thousands of units per site. Its HART-over-4–20mA architecture integrated cleanly with the analog input cards of first- and second-generation DCS platforms: Yokogawa CENTUM CS3000, Honeywell TDC 3000, and ABB MasterPiece 200/1 among them.

Those control systems are themselves aging assets. Replacing them is a capital project measured in years and tens of millions of dollars. In the interim, every instrument on the loop must remain functional. When an EJA110E-JMS fails, the options narrow quickly: find a verified replacement unit, or face a forced migration of the entire measurement loop to a transmitter that the existing DCS input card may not natively support without a signal conditioner or card swap.

How to extend the service life of automation assets by 5–10 years through targeted spare parts management:

Condition & Reliability Assurance

Sourcing obsolete instrumentation from the secondary market carries inherent risk. DriveKNMS applies a structured 5-step inspection protocol to every EJA110E-JMS unit before it is offered for sale.

• Step 1 – Visual and Mechanical Inspection: Housing integrity, nameplate legibility, process connection thread condition, and terminal block examination. Units with physical damage to the housing or corroded process connections are rejected at this stage.
• Step 2 – Electrolytic Capacitor Assessment: Internal inspection for capacitor bulging, electrolyte leakage, or discoloration — the primary failure mode in aging analog electronics. Units showing capacitor degradation are flagged for component-level refurbishment or rejected.
• Step 3 – Firmware and Configuration Verification: Where HART communication is accessible, firmware version is read and recorded. Factory default configuration is verified or restored. Units with corrupted or non-standard configurations are reconfigured to factory baseline before dispatch review.
• Step 4 – Pin and Terminal Corrosion Check: All electrical connection points are inspected under magnification for oxidation, pitting, or contamination. Affected terminals are cleaned to IPC-610 standards or the unit is rejected.
• Step 5 – Functional Bench Test: Where test equipment permits, the transmitter is energized and output signal linearity is verified across the span. Results are recorded and accompany the unit.

Units are classified as New (factory-sealed, original packaging), Refurbished (inspected and restored to functional specification), or As-Is (sold for parts or with disclosed defects). Classification is stated explicitly in the quotation.

Key Features for System Maintenance

• Drop-in replacement: The EJA110E-JMS retains the same process connection geometry, signal output (4–20 mA HART), and housing dimensions as the original installed unit. No pipe modification, no signal conditioner, no DCS input card reconfiguration required in standard installations.
• No reprogramming required: The transmitter ships configured to factory defaults. Range and damping are set via HART communicator in the field — the same procedure used during original commissioning. Instrument technicians already know this procedure.
• Avoids engineering rework costs: A forced migration to a non-equivalent transmitter triggers a management of change (MOC) process, loop documentation revision, and in regulated industries, a process hazard analysis (PHA) review. Using a verified EJA110E-JMS replacement bypasses all of that. The loop stays qualified. The documentation stays current. The plant stays running.
• Preserves DCS compatibility: Legacy DCS analog input cards are calibrated and scaled for specific transmitter output characteristics. Introducing a transmitter with different output behavior — even within the 4–20 mA standard — can require input card recalibration. The EJA110E-JMS eliminates that variable.