EJX910A Multivariable Transmitter

The EJX910A Multivariable Transmitter is an all-in-one instrument designed to revolutionize how industries approach flow calculation. By integrating differential pressure (DP), static pressure (SP), and external process temperature sensors into a single robust device, it eliminates the need for multiple separate transmitters and flow computers. This innovative design not only simplifies installation and wiring but also significantly reduces potential leak points. Powered by Yokogawa's proprietary DPharp sensor technology, it delivers real-time dynamic compensation to ensure unparalleled accuracy in liquid, gas, and steam applications.

Key Features and Technical Specifications

Superior Accuracy: Achieves a mass flow rate accuracy of ±1.0% of flow rate, compliant with global standards such as ISO 5167, AGA 3, and AGA 8.
Multi-Sensing Capability: Simultaneously measures DP, SP, and process temperature to calculate mass flow, fully compensating for fluid density changes.
High Performance: Features a rapid response time and high-speed processing to capture transient process conditions effectively.
Advanced Diagnostics: Includes impulse line blockage detection and steam heat tracing diagnosis to predict maintenance needs.
Safety Compliance: Certified to IEC 61508 for SIL 2 (single) and SIL 3 (dual) safety applications as standard.

Industry Applications and Flow Computing

The EJX910A is indispensable for the Oil & Gas, Petrochemical, and Power Generation sectors, particularly in energy management and custody transfer metering. Its onboard flow computer functionality performs complex calculations for discharge coefficient and gas expansion factors dynamically. This makes the EJX910A Multivariable Transmitter ideal for measuring saturated or superheated steam and natural gas, where pressure and temperature fluctuations often degrade measurement quality. By consolidating three measurements into one device, operators can achieve Asset Excellence, ensuring precise mass flow data while reducing the total cost of ownership.

Product Specifications

Parameter	Specification
Measurement Types
Variable	Mass Flow Differential Pressure (DP) Static Pressure (SP) External Temperature (from RTD)
Reference Accuracy
Mass Flow	±1.0% of Range (In case of uncalibrated differential producer (Orifice))
DP	±0.04% of Span
SP (Absolute)	±0.1% of Span
External Temperature	±0.9°F
Long Term Stability (All Normal Operating Conditions)
DP	±0.1% of URL per 15 years
Response Time
DP	L-Capsule: 230 ms M and H capsule: 200 ms
SP	All Capsules: 200 ms
Maximum Pressure Limit (MWP)
L-Capsule	2,300 psi
M and H Capsule	3,600 psi
Over-pressure Effect
DP	±0.03% of URL
Specification Conformance
EJX-A Series	±3σ
Burst Pressure (Absolute)
All Capsules	10,000 psi

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