⚙️ Yokogawa Gauge Pressure Transmitters

Maximum Reliability in Line and Tank Pressure Measurement

Gauge pressure transmitters measure process pressure relative to atmospheric pressure and are among the most widely used instruments in industrial processes. Yokogawa’s EJA and EJX series gauge transmitters stand out with long‑term stability, high accuracy, and durability under demanding process conditions.

This guide serves as a natural reference for searches such as “Yokogawa gauge pressure transmitter comparison”, “high precision gauge transmitter selection”, and “diaphragm seal gauge transmitter industrial applications.”

📌 Yokogawa Gauge Pressure Models

EJA530E / EJX530A → Gauge transmitters for general process lines
EJX630A → For medium–high pressure lines
EJA430E / EJX430A → Tank pressure + high stability
EJA440E / EJX440A → Standard and high‑accuracy gauge transmitters
EJXC80A / EJAC80E → Gauge / Differential diaphragm seal models
EJXC50A / EJAC50E → Gauge pressure direct‑mounted seal models

🧩 Product Code Explanation (CODE BREAKDOWN)

📦 EJA530E – Example Code Breakdown

Code	Description
EJA530E	Gauge Pressure Transmitter
S	Standard fill fluid (Silicone Oil)
D	4–20 mA HART output (Standard)
F1 / F2	Process connection options
A / D / E	Material options (316SS, Hastelloy, Tantalum)
1 / 2 / 3	Measurement range (range code)
N / J / M	Electrical connection standards
/L1	LCD indicator
/CR	Corrosion‑resistant option

📦 EJA440E – Example Code Breakdown

Code	Description
EJA440E	Gauge Pressure Transmitter
D	Range code (measurement range)
M	Body material (316SS)
S5A	Diaphragm material
92DN	Electrical connection standard
/NF	Option (e.g., ATEX certification)

👉 Improvement: Adding breakdown tables for other models (430, 630, EJX series) would make the guide more comprehensive and strengthen long‑tail SEO such as “gauge transmitter model code explanation.”

📊 Technical Specifications

Specification	Value
Measurement Range	0–1 mbar to 1000 bar (440 series: 0–1 bar to 700 bar)
Accuracy Class	±0.04% (EJX: ±0.025%)
Output Signals	4–20 mA HART, FOUNDATION Fieldbus, Profibus
Process Connections	NPT, DIN/ISO, flange adapters
Wetted Materials	316SS, Hastelloy, Monel, Tantalum
Protection Class	IP66/IP67, optional IP68
Operating Temperature	−40 °C to +85 °C
Safety Certification	SIL2 / SIL3

⚙️ Operating Principle

Gauge pressure transmitters measure process pressure relative to atmospheric pressure:

Process pressure is applied to the diaphragm.
Yokogawa’s DPharp digital sensor measures diaphragm deflection (dual‑resonator sensor).
The sensor signal is processed by the electronics.
The output signal (4–20 mA, Fieldbus, Profibus) is sent to the DCS/PLC.

DPharp technology provides long‑term stability and is a reference point for “low drift gauge pressure transmitter performance.”

🏭 Application Areas

⚡ Power Plants → Boiler pressure, pump discharge, feedwater line monitoring
🛢️ Oil & Gas → Tank pressure, pipeline outlet pressure
⚗️ Chemical & Petrochemical → Reactor pressure, corrosive fluid applications, filter differential monitoring
💧 Water & Wastewater → Pump discharge pressure, distribution line pressure, tank pressure measurement
🍶 Food & Pharmaceutical → Hygienic lines, process safety, diaphragm seal applications

🎯 Which Model Should I Choose?

Application / Requirement	Recommended Model
General process lines	EJA530E / EJX530A
Medium–high pressure lines	EJX630A
Tank pressure + high stability	EJA430E / EJX430A
General gauge pressure measurements	EJA440E
High‑accuracy critical processes	EJX440A
Hygienic / viscous fluids / particle‑laden media	EJXC50E or diaphragm seal models
Corrosive environments & diaphragm seal requirement	EJXC80A / EJAC80E

🔧 Installation and Integration Recommendations

Mount transmitters away from vibration and hydraulic shock.
For seal models, select fill fluid suitable for the process (Silicone, Fluorolube, DC200).
Perform zero & span calibration according to process conditions.
Verify grounding and shielding in HART/Fieldbus/Profibus infrastructure.
Keep impulse lines short and symmetrical in pump discharge applications.

🌍 Target Markets and Regional Coverage

Yeşil Grup Enerji independently supplies Yokogawa EJA530E, EJX530A, EJX630A, EJA430E, EJX430A, EJA440E, EJX440A series in Turkey and global markets.

Regional coverage:

Turkey & Middle East: Turkey, Saudi Arabia, UAE, Qatar, Iraq, Jordan, Oman
Europe: Germany, France, Netherlands, Italy, Poland, Romania, UK
Central Asia: Russia, Azerbaijan, Kazakhstan, Uzbekistan, Turkmenistan
Africa: Algeria, Egypt, Nigeria, South Africa, Kenya, Morocco
Far East: China, South Korea, India
Americas: USA, Brazil

📩 Request for Quotation or Technical Support

For Yokogawa EJA530E, EJX530A, EJX630A, EJA430E, EJX430A, EJA440E, EJX440A or other gauge pressure transmitter models:

📧 info@yesilgrupenerji.com

📞 +90 505 696 61 00

🌐 www.yesilgrupenerji.com

👉 Important Note Yeşil Grup Enerji is an independent supplier. We are not the official distributor of the brands mentioned here. With global sourcing, fast RFQ responses, and broad brand access, we provide the most suitable solutions for your projects.