Yokogawa EJA110A Differential Pressure Transmitter

1. General Description

The Yokogawa EJA110A Differential Pressure Transmitter is a high-quality device. It measures differential pressure, flow, and level accurately. Engineers built this transmitter for use in industrial settings.

The Yokogawa EJA110A is part of the company’s best pressure transmitters. It uses advanced DPharp digital sensor technology. This technology provides great stability and accuracy.

The Yokogawa model EJA110A measures liquid, gas, or steam flow. This makes it useful for many industries. These include oil and gas, petrochemical, power generation, and water treatment. Its modular design allows easy maintenance, calibration, and upgrades—ensuring long-term operational efficiency.

The Yokogawa pressure transmitter EJA110A sends out a standard 4–20 mA DC signal. This signal works well with HART, FOUNDATION Fieldbus, and PROFIBUS PA communication protocols. Built with robust wetted parts materials, it provides high durability even in corrosive or high-pressure process conditions.

2. Yokogawa EJA110A Technical Specifications

l Model: Yokogawa EJA110A

l Type: Differential Pressure Transmitter

l Measuring Range: -100 kPa to +100 kPa

l Accuracy: ±0.065% of span

l Stability: ±0.1% over 5 years

l Output Signal: 4–20 mA DC (HART, FOUNDATION Fieldbus, PROFIBUS PA)

l Power Supply Voltage: 12 to 30 VDC

l Operating Temperature Range: -40°C to +80°C (-40°F to +176°F)

l Storage Temperature Range: -40°C to +85°C (-40°F to +185°F)

l Maximum Working Pressure (MWP): Up to 2,300 psi

l Wetted Parts: Corrosion-resistant stainless steel or optional materials per process requirements

3. Key Features of the Yokogawa EJA110A

A. DPharp Digital Sensor Technology:

B. This system ensures high accuracy, fast response, and superior signal stability.

C. Advanced Diagnostics and Reliability:

D. Detects process abnormalities, wiring issues, and provides real-time monitoring and maintenance alerts.

E. Wide Application Range:

F. The Yokogawa DP transmitter EJA110A can be used to measure liquid, gas, or steam flow, differential pressure, and level.

G. Modular and Service-Friendly Design:

H. This tool allows easy Yokogawa EJA110A calibration, replacement, or reconfiguration in the field.

I. Standardised Output Signal:

J. Delivers a 4–20 mA DC output signal, compatible with most control systems, transmitters, and recorders.

K. Error Detection and Diagnostics:

L. The system provides feedback, such as Yokogawa EJA110A error 07, indicating sensor or configuration issues for faster troubleshooting.

4. Yokogawa EJA110A Applications

l Oil and Gas Pipelines: Differential pressure measurement for flow monitoring and control.

l Petrochemical Plants: Accurate process pressure and flow measurement under harsh conditions.

l Power Generation Facilities: Steam pressure and flow measurement for boiler and turbine systems.

l Water Treatment Plants: Level and flow measurement in filtration and pumping stations.

l Pharmaceutical Manufacturing: Ensures precise process control in hygienic environments.

The Yokogawa transmitter EJA110A performs reliably in both static and dynamic pressure applications, delivering consistent results even in fluctuating conditions.

5. Installation Procedure Step by Step

A. Preparation:

Ensure the installation area is clean and suitable for pressure instrumentation. Gather all necessary tools and materials.

B. Mounting the Transmitter:

Select a stable mounting point appropriate for the process conditions. Use Yokogawa’s recommended brackets for secure installation.

C. Connecting Pressure Lines:

Attach the high and low-pressure lines to the respective ports on the transmitter. Tighten connections to prevent leaks.

D. Electrical Connections:

Connect the power supply cables following the provided wiring diagram. Verify polarity before applying voltage.

E. Configuration:

Use a HART communicator or digital interface to configure measurement range and damping settings. Perform Yokogawa EJA110A calibration to ensure precise output.

F. Testing:

Apply known differential pressures and verify the 4–20 mA DC output corresponds correctly to the expected readings.

G. Final Checks:

Inspect for leaks, confirm wiring integrity, and ensure environmental sealing is intact.

6. Yokogawa EJA110A Related Part Numbers

l EJA120A: Designed for lower differential pressure measurement ranges.

l EJA130A: Optimised for specific process requirements.

l EJA510A: Alternative Yokogawa pressure transmitter model with similar output characteristics.

7. Summary

The Yokogawa EJA110A differential pressure transmitter remains a trusted solution across industries because of its proven accuracy, reliability, and durability. Its ability to use different communication protocols is impressive. It also has a 4–20 mA DC output. This makes it ideal for advanced automation and control systems.

More items, for your reference:

EJX110A Differential Pressure Transmitter

Yokogawa EJA120E differential pressure transmitter