Overview
The Yokogawa EJA110A differential pressure transmitter delivers precision measurement and reliability for process control applications. With 4-20mA DC output and industry-standard communication protocols, this transmitter serves as the core measurement instrument for flow, pressure, level, and density applications across oil and gas, petrochemical, power generation, and water treatment industries.
Key Features
- DPharp Digital Sensor Technology – Advanced silicon resonant sensor provides excellent stability and minimal temperature/pressure hysteresis
- 4-20mA DC Standard Output – Direct integration with most industrial control systems and distributed I/O
- Multi-Protocol Support – Compatible with BRAIN, HART, FOUNDATION Fieldbus, and PROFIBUS PA for flexible system integration
- Modular Design – Simplifies maintenance, calibration, and field upgrades
- Industry-Proven Performance – Over 4.5 million EJA-A series units in global installations since 1991
Technical Specifications
Maximum Differential Pressure Range: 0 to 2000 PSI (configurable ranges available)
Output Signal: 4-20mA DC
Supply Voltage: 24VDC
Sensor Type: DPharp silicon resonant sensor
Communication: BRAIN, HART, FOUNDATION Fieldbus, PROFIBUS PA
Installation Type: Traditional-mount (EJA110A standard configuration)
Wetted Parts Options: Available in multiple materials (stainless steel, Hastelloy, etc.)
Process Connectors: Multiple flange and thread options available
Operating Temperature: See model-specific manual for process and ambient limits
Diaphragm Material: Hastelloy C-276 (optional materials available)
Typical Applications
- Flow rate measurement of liquids, gases, and steam
- Liquid level measurement and monitoring
- Density calculation in process streams
- Differential pressure monitoring across orifice plates and flow restrictors
- Process control in petrochemical, power generation, and water treatment facilities
Compatibility & Replacements
Compatible With
- Yokogawa field control systems (PLC, DCS)
- HART-enabled control networks and handheld communicators
- FOUNDATION Fieldbus architectures
- PROFIBUS PA industrial networks
- Standard 4-20mA analog I/O modules (most industrial PLCs and PACs)
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The EJA110A is the traditional-mount configuration in the EJA series; alternative models (EJA120A, EJA130A) serve different pressure ranges and mounting requirements. Check your legacy equipment documentation and nameplate specifications to confirm direct replacement capability.
Works With
- BRAIN protocol (Yokogawa proprietary digital communication)
- HART (Highway Addressable Remote Transducer) Protocol
- FOUNDATION Fieldbus H1 and HSE
- PROFIBUS PA networks
- Studio 5000 (Allen-Bradley) via 4-20mA I/O modules
- TIA Portal (Siemens) via analog input modules
