EJX440A

What is EJX440A gauge pressure transmitter?

The EJX440A gauge pressure transmitter by Yokogawa Electric Corporation represents a state-of-the-art solution for measuring pressure in liquids, gases, or steam. With its single crystal silicon resonant sensor, the product provides quick response and advanced diagnostic functions, making it an ideal choice for demanding industrial environments. The transmitter outputs a 4 to 20 mA DC signal that corresponds to the measured pressure and supports digital communications via BRAIN or HART protocols.

Key Features

Multi-Sensing Technology: The EJX440A leverages multi-sensing technology to detect abnormalities such as impulse line blockage or heat trace breakage, enhancing preventive maintenance capabilities.

Remote Setup and Monitoring: The device supports remote configuration and monitoring through BRAIN or HART communications, facilitating efficient operation and maintenance.

SIL Certification: The EJX series models, except for Fieldbus and PROFIBUS types, are SIL 2 certified, ensuring a high level of safety and reliability.

EJX440A Gauge Pressure Transmitter Technical Specifications

Measurement Range

C Span: 0.25 to 32 MPa (36 to 4500 psi)

D Span: 0.25 to 50 MPa (36 to 7200 psi)

Detailed lower and upper limit values for each range.

Reference Accuracy

Percentage accuracy for both measurement spans C and D, along with the corresponding URL.

Ambient Temperature Effects

The impact of temperature changes on measurement accuracy, including the compensated temperature range.

Stability

Percentage stability over a specified period, detailing expected changes over 15 years.

Power Supply

Recommended supply voltage range and type.

Output Signal

The output range for the 4 to 20 mA DC signal.

Load Capacity

Maximum external load resistance and requirements for communication protocols.

Vibration Effects

Stability of the output under different vibration frequencies and displacements.

Mounting Position Effects

Zero drift and compensation measures when the device is installed in various positions.

Response Time

Time taken for the device to reach a stable output.

Housing Material

Materials used for the housing and connectors.

Degree of Protection

Protection ratings such as IP66/IP67.

Temperature Range

Operating ranges for both ambient and process temperatures.

Communication and Output

Output Signal: The device offers a two-wire 4 to 20 mA DC output with digital communications, programmable for linear or square root output.

Advanced Diagnostics: The Yokogawa ejx440a includes advanced diagnostic functions for detecting impulse line blockage and heat trace monitoring, providing valuable insights into the device's operational status.

Safety and Certification

SIL Certification: The EJX series models are SIL 2 certified for single transmitter use and SIL 3 certified for dual transmitter use, ensuring a high level of safety in operation.

Reliability Data: The Operational Safety Data Sheet, which can be purchased from Yokogawa's internet site, contains extensive stability statistics.

Applications for EJX440A Gauge Pressure Transmitter

Chemical Processing Plants: Boiler and mixing vessel pressure tracking is an aspect that renders this device ideal for chemical manufacturing sites as it assures reliable and secure operations.

Food and Beverage Industry: In the food and beverage sector, the transmitter can be used to maintain pressure in processing equipment, ensuring consistent product quality and adherence to hygiene standards.

Marine and Offshore Applications: The EJX440A's robust construction and SIL certification make it suitable for marine environments, where it can be used to monitor pressures in ship propulsion systems and offshore drilling platforms.

Refrigeration and Cooling Systems: This device's capability to detect pressure in combining vessels and boilers makes it suitable for chemical workplaces since it assures dependable and secure operations.

Automotive and Aerospace: In the automotive and aerospace industries, the product can be used in testing facilities and during production to monitor pressures in engines, hydraulic systems, and other critical components.

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