Yokogawa EJA430A Pressure Transmitter

1.General Description

The Yokogawa EJA430A Gauge Pressure Transmitter is a high-performance device. It measures the pressure of liquids, gases, and steam. People know this transmitter for its accuracy and stability.

Yokogawa’s DPharp digital sensor family is well-known. It offers reliable gauge pressure, differential pressure, and level measurement. This works well in many process conditions.

Hic Transmissor Pressionis Gauge habet sensorem digitalem DPharp a Yokogawa, cum technologia resonantis silicii monocrystalli. Haec technologia praestat altam praecisionem, parvam hysteresis, et bonam longam perficiendi. The EJA430A gives a 4–20 mA DC analog output signal. It also has digital communication for HART®, BRAIN™, or Fieldbus integration.

Engineers manufacture the EJA430A from stainless steel parts. Engineers design it for high-pressure and high-temperature use. This makes it perfect for tough environments. Its rugged design and proven reliability make it suitable for oil and gas, chemical, pharmaceutical, and water treatment industries.

2. yokogawa pressure transmitter eja430a Technical Specifications

l Type: Gauge Pressure Transmitter

l Measurement Principle: Measures the pressure of liquids, gases, and steam compared to atmospheric pressure.

l Accuracy: ±0.065% of Span

l Stability: ±0.1% of URL every 5 years

l Maximum Working Pressure (MWP): 3,000 psi

l Output Signal: 4–20 mA DC with digital communication (HART®, BRAIN™, or FOUNDATION Fieldbus)

l Wetted Parts: SUS316L Stainless Steel, optional Teflon coating

l Power Supply Voltage: 10.5 to 42 VDC

l Operating Temperature Range: -40°C to +85°C

l Process Connections: ½-inch or ¼-inch NPT female connections

l Fill Fluid Options: Silicone oil, fluorinated oil, or inert fill fluid

l Mounting Type: Traditional or direct mount

l Process Temperature: Up to 120°C (standard), higher with remote mount options

3.eja430a yokogawa transmitter Features

l High Performance & Accuracy:

Provides ±0.065% accuracy and ±0.1% stability over 5 years using Yokogawa’s DPharp digital pressure sensor, ensuring precise pressure measurement in demanding applications.

l Rugged, Stainless Steel Construction:

The EJA430A has a stainless steel housing and wetted parts. This makes it perfect for high temperature, high pressure, and corrosive environments.

l Versatile Measurement Capability:

Measures gauge pressure, differential pressure, and related liquid levels or densities, based on the Bernoulli pressure difference principle.

l Reliable Output Signal:

Provides a 4–20 mA DC analog output signal with superimposed digital communication for diagnostics and configuration.

l Advanced Diagnostics and Leak Test:

Integrated self-check functions detect sensor degradation, impulse line blockage, or process leaks, ensuring safe and continuous operation.

l Long-Term Stability:

Exceptional sensor design provides long-term performance with minimal drift, reducing calibration frequency.

l Flexible Communication Protocols:

Compatible with HART®, BRAIN™, and Fieldbus for seamless DCS and PLC system integration.

l Extended Measuring Range:

Wide measuring range supports pressures up to 3,000 psi

4.Applications

The EJA430A Yokogawa Pressure Transmitter is widely used in:

l Oil and Gas: Monitoring process and line pressures, and differential readings for flow calculation.

l Chemical Processing: High accuracy pressure and level measurement under corrosive and high-pressure conditions.

l Pharmaceutical Industries: Clean and sterile applications requiring digital pressure measurement precision.

l Water and Wastewater Treatment: Continuous monitoring of pump and filter pressure.

l Power Generation: Steam and boiler pressure measurement and absolute pressure tracking.

5.Installation Procedure (Step-by-Step)

l Select Installation Location:

Choose a stable, vibration-free area accessible for maintenance, suitable for high temperature and high pressure conditions.

l Prepare Mounting Surface:

Clean and inspect the surface to ensure a proper seal between the process connections and transmitter flange.

l Mount the Transmitter:

Install using appropriate mounting brackets or U-bolts; ensure correct orientation for accurate pressure sensing.

l Connect Process Piping:

Attach to the process line using NPT female connectors and appropriate gaskets. Tighten securely to avoid leaks.

l Wiring Connections:

Connect the power supply (10.5–42 VDC) and the 4–20 mA output according to the provided wiring diagram. Check polarity.

l Configuration:

Use HART® communicator, BRAIN™ terminal, or Fieldbus interface to configure measurement range, damping, and output parameters.

l Leak Test:

Perform a leak test on all joints and connections before energizing the unit.

l Testing and Calibration:

Apply known pressure values to verify transmitter accuracy and output signal response.

l Final Inspection:

Confirm secure mounting, no process leakage, and stable readings before placing the system into operation.

6.Yokogawa EJA430A Related Part Numbers

l EJA430A-EAS5B-99EN/KU2/E1 – Standard 4–20 mA with HART communication.

l EJA430A-EBS5A-94BM01T02N4D3 – FOUNDATION Fieldbus variant for digital integration.

l Yokogawa EJX430A – Advanced performance model with enhanced accuracy and faster response.

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