Key Benefits and Advantages
Specialized True Draft Range Design: Unlike standard differential transmitters that are scaled down, the EJA120E features a sensor specifically optimized for very low-pressure spans. This true draft range design provides the high sensitivity needed to monitor minute pressure changes in combustion air and exhaust gases, ensuring optimal burner performance.
Enhanced Accuracy for Low-Pressure Control: The EJA110E provides a standard reference accuracy of ± 0.2% of span. For critical environmental or combustion efficiency applications, the optional /HAC (High Accuracy) version delivers an improved precision of ± 0.09%, allowing for tighter control of furnace pressures and draft flows.
Certified Safety and Compliance: Reliability in combustion control is vital for plant safety. The EJA120E is Exida and TUV SIL 2/3 certified, making it a trusted component for Safety Instrumented Systems (SIS). This certification ensures the transmitter can be integrated into safety loops to prevent hazardous conditions in boilers and furnaces.
Proven Long-Term Stability: To maintain measurement integrity in harsh exhaust environments, the EJA120E offers a stability rating of ± 0.3% per 1 year. This consistent performance reduces the need for frequent zero-point adjustments, ensuring long-term reliability in varying industrial temperatures.
Advanced Communication Flexibility: The EJA120E supports a wide array of industrial protocols, including HART 5/7, FOUNDATION Fieldbus, PROFIBUS PA, and BRAIN. Additionally, a 1 to 5 VDC HART 7 (Low Power) option is available for remote monitoring sites or areas with limited power availability.
Local Field Configuration: Through the Local Parameter Setting (LPS) feature, operators can configure and adjust the transmitter directly in the field. This local interface simplifies the setup process and allows for quick troubleshooting without requiring specialized handheld communicators.
Technical Properties
Operation: True draft range digital sensing using silicon resonant sensor technology (DPharp).
Service: Optimized for Low-Pressure Differential measurement of Air and Gases.
Reference Accuracy: ± 0.2% of Span (Standard); ± 0.09% of Span (Optional /HAC).
Stability: ± 0.3% per 1 year.
Response Time: 150 ms.
Safety Certification: Exida and TUV SIL 2 / SIL 3 Certified.
Mounting: Traditional-mount design for easy integration with standard piping and manifolds.
Communication: HART 5/7, 1 to 5 VDC HART 7, FOUNDATION Fieldbus, PROFIBUS PA, or BRAIN.
Field of Application
The EJA120E is the preferred choice for low-pressure differential measurement where a true draft range design and safety certification are required.
Primary Industries and Uses:
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Power Generation: Measuring furnace draft pressure and primary/secondary air flow in utility boilers.
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Steel and Glass: Monitoring vacuum and pressure in large industrial kilns and melting furnaces.
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Petrochemical: Managing flue gas pressure in process heaters and thermal oxidizers.
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Environmental Monitoring: Tracking low-pressure air flow in scrubbers and stack emission monitoring systems.
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HVAC and Cleanrooms: Measuring small differential pressures across high-efficiency filters and between cleanroom zones
