EJA110E Differential Pressure Transmitter

EJA110E Differential Pressure Transmitter

The EJA-E series of transmitters is Yokogawa’s most recent evolution of the DPharp family of pressure transmitters. Released in 2012, it combines the ruggedness and success of the work-horse EJA-A series with the performance of the thoroughbred EJX-A series to deliver the type of product you have come to expect from Yokogawa. The EJA110E is our standard traditional-mount differential pressure transmitter in this series.

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EJA110E features include:

  • 0.055% Accuracy (0.04% Accuracy optional)
  • 0.1% Stability per 10 years
  • 90 ms Response Time
  • Exida and TUV SIL 2 / SIL3 Certified
  • MWP 2,300 psi (MWP 3,600 psi option)
  • Local Parameter Setting (LPS)

Sensor Type

Single-crystal silicon resonant (DPharp)

Measured Variables

Primary: Differential Pressure (DP)

Secondary: Static Pressure (SP)

Output Signal

4–20 mA DC + digital communication (HART 5 / HART 7). Also available in FOUNDATION Fieldbus, PROFIBUS PA, and low-power 1–5 V + HART.

Reference Accuracy

± 0.055% of span (standard)

Optional: ± 0.04% of span

Response Time

90 ms for DP, 360 ms for SP

Long-Term Stability

± 0.1% of URL (upper range limit) per 10 years

Rangeability (Turndown)

100 : 1

Over-pressure Capability

Over-pressure effect: ± 0.03% of URL

Maximum working pressure (MWP):

2,300 psi standard; optional 3,600 psi.

Stability Under Over-pressure

Mechanical protection built into capsule for over-pressure resilience.

Functional Safety

SIL 2 (single transmitter) / SIL 3 (with dual) certified by Exida & TÜV per IEC 61508 / IEC 61511.

Local Parameter Setting (LPS) Yes

adjustment via push-buttons or zero-adjustment screw.

Pressure Connections

Industry-standard IEC 61518 process connections.

Wetted Materials Multiple options

Hastelloy C-276, 316L stainless, PTFE gaskets, depending on model code.

Calibration / Measuring Ranges (“Capsules”) Wide range

from very low DP (e.g. 0.5–10 kPa) to high differential pressure ranges, depending on capsule code.

Self-Diagnostics Yes

real-time diagnostics, “Back-check Technology” (BCT) for signal validation.

Power Supply Effect For 4–20 mA types

± 0.005% of span per V (depending on supply) (per Insatech spec)

Features

  • Uses a single-crystal silicon resonant (DPharp) sensor, which provides very high accuracy and long-term stability.
  • Mechanical overpressure protection design: can handle very high pressures and return to normal function without needing recalibration.
  • Static pressure is shown on the local display or can be monitored remotely.
  • Optional LCD indicator: 5-digit numeric, 6-digit unit, and bar graph.
  • The display can show differential pressure, percent span, static pressure, and more.
  • Performs diagnostics for CPU failure, hardware issues, configuration errors, over-range, etc.