Yokogawa EJA210A Differential Pressure Transmitter

1.General Description

The Yokogawa EJA210A Differential Pressure Transmitter is a flange-mount liquid level transmitters. It measures liquid levels accurately. It also monitors pressure and density in many industrial processes.

The Yokogawa Flange Mounted Differential Pressure Transmitters use Yokogawa’s DPharp active sensor. This design is strong and reliable. It provides excellent performance and stability over time, even in tough conditions.

This flange-mounted differential pressure transmitter works based on the Bernoulli equation. It measures the pressure difference to find the level of liquids. It does this by comparing the pressure between two points.

The EJA210A works well with solidifying or high-density fluids. Also great for clean-in-place processes. The pharmaceutical and food industries use these processes, where reliability and hygiene hold great importance.

The EJA210A has a 4 to 20 mA DC output signal. It also offers advanced digital communication options.

This device provides great precision and stability. It works well with modern control systems. This makes it a reliable choice for important level measurement and pressure transmitter tasks.

2.Yokogawa EJA210A Technical Specifications

l Specification Details for Yokogawa EJA210A

l Type: Flange-mounted Differential Pressure Transmitter

l Measurement Principle: Differential Pressure (based on Bernoulli's equation for level measurement)

l Accuracy: ±0.075% of Span

l Stability: ±0.1% over 5 years

l Output Signal: 4 to 20 mA DC with digital communication (BRAIN, HART, or Fieldbus)

l Process Connection: Flush Flange Type (3-inch standard)

l Protection Rating: IP67, Type 4X

l Wetted Parts Materials: Diaphragm: Hastelloy C-276; Gasket: Teflon-coated SUS316L

l Weight: About 10.7 kg (23.6 lb)

l Mounting Type: Flange Mounted

l Measuring Ranges: Configurable based on application needs

3.Features

l DPharp Active Sensor Technology:

Utilizes Yokogawa’s DPharp active sensor, providing exceptional accuracy, digital stability, and fast response for precise level and pressure measurement.

l Flange-Mounted Design:

The flange-mounted design makes installation and cleaning easier. This is great for measuring liquid levels in tanks and vessels.

l High Performance and Stability:

The monocrystal silicon resonant sensor minimizes hysteresis and offers excellent long-term performance under variable temperature and pressure conditions.

l Rugged Construction:

Built with corrosion-resistant materials and a robust housing, ensuring reliable operation in demanding environments such as chemical, petrochemical, and pharmaceutical industries.

l Wide Measuring Ranges:

Capable of handling diverse differential pressure and level measurement applications — from low-pressure liquids to high-density process media.

l Field Communication Options:

Supports 4–20 mA output signals. It also works with digital communication protocols like HART, FOUNDATION Fieldbus, and BRAIN. This ensures easy integration with modern DCS and PLC systems.

l Versatile Application:

Accurately measures levels and densities of solidifying or viscous liquids, offering dependable performance in complex industrial processes.

4.Yokogawa EJA210A Applications

The Yokogawa EJA210A is widely used across various sectors, including:

l Oil and Gas: Tank level monitoring and interface measurement.

l Chemical and Petrochemical Processing: Precise level control in corrosive or high-density fluids.

l Water and Wastewater Treatment: Level and differential pressure measurement in reservoirs and treatment basins.

l Food and Beverage Manufacturing: Hygienic level monitoring in mixing and fermentation tanks.

l Pharmaceutical Industries: Sterile liquid level control in bioprocess and formulation systems.

5.Installation Procedure Step by Step

l Select Installation Location:

Choose a location that allows safe access and proper orientation for flange-mounted installation. Ensure it complies with process and safety requirements.

l Prepare the Mounting Surface:

Clean, level, and inspect the mounting flange surface for debris or damage to ensure a tight seal.

l Attach the Transmitter:

Mount the Yokogawa EJA210A securely to the flange using appropriate bolts and gaskets to prevent leakage.

l Connect Impulse or Process Piping:

Install and secure impulse piping according to the process schematic. Confirm the transmitter ports correspond correctly to the high and low-pressure sides.

l Wiring Connections:

Connect the electrical wiring as per the EJA210A wiring diagram. Verify correct polarity for the 4–20 mA output and communication lines.

l Zero Point Adjustment:

Vent both sides to atmosphere and perform a zero adjustment following the manufacturer’s procedures.

l Testing and Verification:

Apply known pressures to verify differential pressure response and confirm the output signal corresponds accurately to the measured levels.

6.Yokogawa EJA210A Related Part Numbers

l EJA220A: Extended flange type for deeper vessel installations.

l EJA210E: Earlier generation model (discontinued).

l EJA210A-DMS4A-92DA/NF1: Standard flange-mount configuration for level and density applications.

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