Yokogawa EJA310E Absolute Pressure Transmitter

1.General Description

The Yokogawa EJA310E is a standard absolute pressure transmitter. Engineers design it for accurate pressure measurement in tough industrial settings.

The EJA310E is a Yokogawa absolute pressure transmitter and pressure transducer. It has a single crystal silicon sensor. This sensor provides high resolution and great thermal stability. It also ensures reliable measurements for a long time.

The EJA310E is a sensor that measures the pressure of gases or liquids. It uses a vacuum as a reference point. This sensor converts the measured pressure into a stable electrical output. It belongs to Yokogawa’s family of digital pressure transmitters, offering advanced diagnostics and integration with modern control systems.

2.Yokogawa EJA310E Technical Specifications

l Model: EJA310E

l Type: Absolute Pressure Transmitter / Standard absolute pressure transmitter (traditional-mount)

l Sensor: Single crystal silicon resonant sensor

l Accuracy: ±0.1%

l Stability: ±0.2% over 10 years

l Response Time: 90 ms

l Maximum Working Pressure (MWP): 3,600 psi

l Output Signal: 4 to 20 mA DC. The transmitter sends a 4 to 20 mA DC signal. This signal matches the measured pressure. It converts the measured pressure into a 4–20 mA DC current output.

l Communication Protocols: HART 5/7, FOUNDATION Fieldbus, PROFIBUS PA, or BRAIN

l Protection Rating: IP67

l Wetted Parts Materials: Teflon®-coated 316L stainless steel (options available)

l Measured Media: Gases or liquids (process pressure, absolute measurements)

l Application Range: Suitable for absolute, gauge and differential pressure applications when paired with appropriate models or seals

3.EJA310E Standard Features

l Single crystal silicon resonant sensor for high accuracy and minimal drift.

l Standard absolute pressure transmitter configuration for direct absolute measurements (vacuum reference).

l Digital pressure transmitter capabilities — remote setup, monitoring, and diagnostics via HART/BRAIN/Fieldbus.

l 4–20 mA DC output with superimposed digital signaling for integration into process control systems.

l Rugged, traditional-mount housing designed for industrial process environments and long-term reliability.

l Safety and stability features suitable for continuous process pressure monitoring of gases or liquids.

4.Applications

Process industries commonly use the EJA310E Absolute Pressure Transmitter. It reliably monitors absolute pressure and gas pressure, including:

l Oil & gas production and custody transfer (absolute pressure measurement)

l Chemical and petrochemical processes where a fixed reference point is required

l Power generation and steam systems (when absolute references are needed)

l Water treatment and utilities for process pressure control

l Pharmaceutical and food industries where traceable, reliable measurements are essential

5.Installation Procedure (Step by Step)

A. Select Installation Location: Choose a stable, accessible mounting point compliant with safety regulations.

B. Prepare Mounting Surface: Clean and level the surface for the traditional-mount transmitter.

C. Attach the Transmitter: Securely fasten the EJA310E using the recommended bolts and torque.

D. Connect Pressure Lines: Install appropriate process connections; confirm cleanliness to avoid contamination of the absolute reference.

E. Wiring Connections: Use the wiring diagram in the user manual. Connect the power and 4–20 mA loop. Set up digital communication as needed.

F. Zero / Reference Check: Verify the absolute reference (vacuum) integrity and perform any zero-point verification per manufacturer guidance.

G. Calibration and Testing: Turn on the device, calibrate it, and run tests. This will check if the measured pressure matches the 4–20 mA DC output.

H. Final Inspection: Check seals, grounding, and that the transmitter reports stable readings for process pressure of gases or liquids.

6.Yokogawa EJA310E Related Part Numbers

l EJA310A (alternate configurations)

l EJX310E (fieldbus / enhanced digital variants)

  Yokogawa EJA120E differential pressure transmitter

  EJX110A Differential Pressure Transmitter