EJX438A Overview

The EJX438A from Yokogawa Electric Corporation is a robust and versatile EJX438A Diaphragm Sealed Gauge Pressure Transmitter designed for precision measurement in a variety of industrial applications. This transmitter is engineered to provide reliable and accurate pressure readings for liquids, gases, or steam, ensuring optimal process control and monitoring.

Shaanxi Zhiyanyu is a professional supplier of high-quality process control testing and measuring instruments. We specialize in selling various transmitters, including pressure transmitters, temperature transmitters, flow transmitters, liquid level meters, flow meters, pressure gauges, sensors, valve positioners and other instruments. Widely used in chemical industry, petroleum, papermaking, electric power, city gas, environmental protection, water treatment and other fields. Most of our products are exported to the Middle East, Asia, Africa and America. It also enjoys a high reputation at home and abroad. We can provide selection quotations for more products of this brand, which can best meet your needs!

Key Features

Diaphragm Seal Technology: The product utilizes an inner diaphragm design that prevents process media from directly contacting the pressure-sensing assembly, enhancing the transmitter's durability and reliability in harsh environments.

Flexible Installation: With the ability to install on small size flanges (1 inch, 3/4 inch, or 1/2 inch), the product offers a compact solution that fits seamlessly into tight spaces without compromising performance.

Wide Measurement Range: The transmitter boasts a broad measurement span and range limits, catering to diverse applications with varying pressure requirements.

Advanced Diagnostics: Equipped with multi-sensing technology, the product can detect abnormalities such as impulse line blockage, ensuring the safety and integrity of the process.

Communication Protocols: Available with Foundation Fieldbus and PROFIBUS PA protocols, the transmitter supports industry-standard communication for seamless integration into modern control systems.

Safety Certification: SIL 2 certified (except for Fieldbus and PROFIBUS types), the EJX series models meet stringent safety requirements, ensuring a high level of process safety.

Technical Specifications

Measurement Span and Range: The product offers two measurement span options (A and B) with corresponding pressure ranges in MPa, psi, and kgf/cm².

Accuracy: The reference accuracy of the calibrated span ensures precise measurements, with specific percentages based on the upper range limit (URL) and span value.

Ambient Temperature Effects: The transmitter is designed to minimize ambient temperature effects on zero shift, maintaining accuracy across a wide temperature range.

Output Signal: A two-wire 4 to 20 mA DC output with digital communications, compatible with BRAIN or HART FSK protocol for remote setup and monitoring.

Response Time: With a quick response time of approximately 200 ms, the transmitter provides timely feedback for dynamic process changes.

I apologize for any confusion, but as an AI developed by Moonshot AI, I don't have the capability to provide physical documents or files, including product manuals. However, I can provide a detailed overview of the technical specifications for the diaphragm seal pressure transmitter based on the information available in the document you provided earlier.

EJX438A Diaphragm Sealed Gauge Pressure Transmitter Technical Specifications

General Specifications:

Sensor Type: Inner Diaphragm

Communication: BRAIN or HART Protocols, Foundation Fieldbus, and PROFIBUS PA (depending on the model variant)

Certifications: SIL 2 certified (except for Fieldbus and PROFIBUS types)

Measurement Span and Range:

Span A: 0.035 to 3.5 MPa (5 to 500 psi)

Range A: -0.1 to 3.5 MPa (-14.5 to 500 psi)

Span B: 0.16 to 16 MPa (23 to 2300 psi)

Range B: -0.1 to 16 MPa (-14.5 to 2300 psi)

Performance Specifications:

Reference Accuracy: ±0.15% of Span for Span ≤ 0.35 MPa (50 psi) and ±(0.1 + 0.005 URL/Span)% of Span for Span > 0.35 MPa (50 psi)

URL (Upper Range Limit): 3.5 MPa (500 psi) for Span A and 16 MPa (2300 psi) for Span B

Ambient Temperature Effects: ±(0.2 + 0.42 × ΔT)% of Span, where ΔT is the change in ambient temperature from 25°C (77°F)

Output Specifications:

Output Signal: Two-wire 4 to 20 mA DC with digital communications superimposed

Output Range: 3.6 mA to 21.6 mA (typical)

Output Limits: Conform to NAMUR NE43 and can be preset by option code C2 or C3

Response Time:

Typical Value: 200 ms (including dead time of 45 ms)

Operating Conditions:

Ambient Temperature: -40 to 60°C (-40 to 140°F) for non-LCD display models; -30 to 60°C (-22 to 140°F) for models with LCD display

Process Temperature: As per the fill fluid code (refer to table 1 in the document)

Ambient Humidity: 0 to 100% RH

Working Pressure: As per the flange rating (refer to table 1)

Electrical Requirements:

Supply Voltage: 10.5 to 42 V DC for general use; 10.5 to 32 V DC for models with lightning protector option

Load Resistance: Up to 550 Ω with 24 V DC supply

Physical Specifications:

Process Connections: Distinct JIS, ANSI, and JPI-approved flange widths and grades (1/2-inch, 3/4-inch, and 1-inch).

Wetted Parts Material: 316 SST (polished iron), with additional elements such as Hastelloy C-276 accessible

Flange Material: 316 SST (stainless steel) or as per option code

Gasket Material: PTFE (Teflon) coated or as per option code

Optional Features:

Status Output: One transistor contact output for high/low pressure alarm status

Advanced Diagnostics: Impulse line blockage detection and other advanced monitoring functions

For a complete and detailed product manual, including installation instructions, wiring diagrams, and maintenance guidelines, I recommend reaching out directly to Yokogawa Electric Corporation or an authorized distributor. They will be able to provide you with the most accurate and up-to-date documentation for the EJX438A pressure transmitter.

Applications

The EJX438A is suitable for a multitude of industrial applications, including, but not limited to:

Chemical and petrochemical plants

Oil and gas refineries

Power generation facilities

Water and wastewater treatment plants

Food and beverage manufacturing

Pharmaceutical and biotech industries

HVAC systems for buildings and facilities

Why Choose Shaaxi ZYY?

Shaaxi ZYY is a reputable supplier of professional instrumentation, specializing in a wide range of imported brands such as Emerson, Rosemount, Yokogawa, E+H, Azbil, Fisher, Honeywell, ABB, Siemens, and more. Having been in the sector for a decade and a half, we take enormous pride in offering our customers an extensive selection of tailored options and models for products.

Our profound knowledge of the goods we supply and the market segments we represent reflects our commitment to authenticity. Whether you require a single unit or a complete system, our team of experts is ready to assist you in finding the perfect fit for your application.

Get in Touch

For more information on the EJX438A or to receive a quote, please contact us at lm@zyyinstrument.com. Our dedicated sales team is ready to provide you with professional advice and support. Explore the potential of Yokogawa's EJX438A with Shaaxi ZYY—Your Partner in Precision Instrumentation.