Yokogawa EJA110A Differential Pressure Transmitter

Name: Yokogawa EJA110A Differential Pressure Transmitter
Brand: Yokogawa

Model: EJA110A

Brand Yokogawa

Series Pending

Model EJA110A

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Product Details And Specifications

Yokogawa EJA110A Series Technical Notes

The Yokogawa EJA110A is a high-performance differential pressure transmitter from Yokogawa Electric Corporation's EJA-A Series, engineered for continuous process measurement in heavy industrial environments. It is deployed across petrochemical complexes, oil refineries, nuclear power stations, LNG terminals, and chemical processing plants globally. The EJA110A operates on the resonant silicon sensor (DPharp) principle, delivering measurement accuracy of ±0.04% of span with long-term stability of ±0.1% per 10 years. Its 4–20 mA HART output, combined with optional FOUNDATION Fieldbus and PROFIBUS PA communication, makes it a standard reference instrument in distributed control system (DCS) architectures worldwide. The EJA110A is fully compliant with IEC 61508 SIL 2 requirements, qualifying it for safety instrumented system (SIS) applications.

The Evolution of EJA110A Architecture

Yokogawa's differential pressure transmitter lineage traces from the EJA Series (introduced 1991) through the EJA-A Series (EJA110A, launched 1999) to the current EJA110E generation. The EJA110A replaced the original EJA110 by incorporating enhanced DPharp silicon resonant sensor technology, improving rangeability to 100:1 and extending the operating temperature range to –40°C to +85°C. The EJA-A Series introduced integral manifold compatibility and expanded wetted material options (316L SST, Hastelloy C-276, Tantalum) to address corrosive media applications in chlor-alkali and sulfuric acid plants.

EJA110A Full Catalog & Functionalities (SKU List)

The following SKUs represent the primary model codes within the EJA110A configuration matrix. Each model code encodes capsule type, output signal, process connection, and wetted material. All units listed are differential pressure measurement modules unless otherwise noted.

EJA110A-DMS4A-92DA: Standard DP transmitter, 4–20 mA HART, 316L SST wetted parts, 1/2 NPT process connection, –10 to 150 kPa span.
EJA110A-DMS4A-92NN: DP transmitter, HART output, 316L SST, no manifold, general-purpose housing.
EJA110A-EMS4A-92DA: Extended range DP transmitter, 4–20 mA HART, 316L SST, –100 to 500 kPa span.
EJA110A-DHS4A-92DA: High-static DP transmitter, Hastelloy C-276 wetted parts, 4–20 mA HART, corrosive service.
EJA110A-DTS4A-92DA: Tantalum-wetted DP transmitter, 4–20 mA HART, for highly corrosive media (HF, HCl).
EJA110A-DMS5A-92DA: DP transmitter, FOUNDATION Fieldbus H1 output, 316L SST, intrinsically safe.
EJA110A-DMS6A-92DA: DP transmitter, PROFIBUS PA output, 316L SST, segment coupler compatible.
EJA110A-DMS4A-92DA/KF22: DP transmitter with integral 5-valve manifold, HART, 316L SST.
EJA110A-DMS4A-92DA/C1: DP transmitter, HART, 316L SST, with LCD digital indicator.
EJA110A-DMS4A-92DA/SF1: DP transmitter, HART, 316L SST, SIL 2 certified configuration.
EJA110A-EHS4A-92DA: Extended range, Hastelloy C-276, HART, high-pressure capsule, refinery service.
EJA110A-DMS4A-92DA/HH4: DP transmitter, HART, 316L SST, high-temperature process seal option, up to 400°C.
EJA110A-DMS4A-92DA/M1: DP transmitter, HART, 316L SST, NAMUR NE43 compliant output.
EJA110A-DMS4A-92DA/D1: DP transmitter, HART, 316L SST, enhanced EMI/RFI shielding for high-interference environments.
EJA110A-DMS4A-92DA/G1: DP transmitter, HART, 316L SST, gold-plated terminal block for low-level signal integrity.
EJA110A-DMS4A-92DA/JA: DP transmitter, HART, 316L SST, JIS B 2220 flange process connection, Japan domestic standard.
EJA110A-DMS4A-92DA/U1: DP transmitter, HART, 316L SST, ATEX/IECEx Zone 1 explosion-proof certification.

Sourcing Hard-to-Find & Obsolete EJA110A Parts

The EJA110A has been in field service since 1999. A significant installed base remains operational in CENTUM CS, CENTUM CS3000, and third-party DCS environments where instrument replacement requires exact model-code matching to preserve loop calibration records and SIS validation documentation. DriveKNMS maintains a dedicated inventory of EJA110A units and sub-assemblies, including amplifier modules, sensor capsules (D capsule, E capsule), terminal boxes, and process flanges.

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