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Yokogawa EJA210A-EHSA1F5B-97DN/FF1/D1/HC/A/N4 Flange Mounted Differential Pressure Transmitter

Yokogawa EJA210A-EHSA1F5B-97DN/FF1/D1/HC/A/N4 Flange Mounted Differential Pressure Transmitter

The Yokogawa EJA210A series is a high-performance flange-mounted differential pressure transmitter designed for precise liquid level measurement in open or closed tanks. The specific configuration EJA210A-EHSA1F5B-97DN/FF1/D1/HC/A/N4 indicates a specialized build...

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SKU: EJA210A-EHSA1F5B-97DN/FF1/D1/HC/A/N4
Vendor: Yokogawa
Category: Flange Mounted Differential Pressure Transmitter
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The Yokogawa EJA210A series is a high-performance flange-mounted differential pressure transmitter designed for precise liquid level measurement in open or closed tanks. The specific configuration EJA210A-EHSA1F5B-97DN/FF1/D1/HC/A/N4 indicates a specialized build tailored for industrial process control and safety environments.

Model Suffix Code Breakdown

  • EJA210A: Base model for flange-mounted differential pressure transmitter.
  • E: Output signal (4 to 20 mA DC).
  • H: Measurement span (High/Medium pressure range).
  • S: Wetted parts material (Stainless Steel 316L).
  • A: Process connection (Flange size/rating specifics).
  • 1: Fill fluid (Silicone oil).
  • F5B: Flange rating and material specifications.
  • 97DN/FF1/D1/HC/A/N4: Options specifying explosion protection (FM/ATEX/IECEx compliance), local indicator display, Hastelloy C diaphragm materials, and specific mounting requirements.

Hardware Specifications

Parameter Specification
Model EJA210A
Brand Yokogawa
Accuracy $\pm 0.075\%$ of span
Stability $\pm 0.1\%$ of URL for 60 months
Response Time 200 ms
Operating Temp -40 to 120 °C (process temperature)
Power Supply 10.5 to 42 V DC
Protocol HART 5/7, FOUNDATION Fieldbus, or BRAIN

Sensing Technology

The EJA210A utilizes Yokogawa’s proprietary DPharp silicon resonant sensor. Unlike traditional capacitive sensors that rely on physical displacement of a diaphragm to measure capacitance, the DPharp sensor uses two micro-resonators to measure the pressure as a frequency. This leads to superior accuracy, high stability, and immunity to changes in ambient temperature or static pressure.

Frequently Asked Questions

Q: Can this transmitter be used for corrosive process fluids?

A: Yes. The "HC" option indicates the use of Hastelloy C diaphragms, which are highly resistant to chemical corrosion compared to standard 316 stainless steel.

Q: Is this model suitable for hazardous environments?

A: Yes. The suffix codes FF1 and associated certifications indicate that this unit is designed and approved for use in explosive atmospheres (e.g., FM/ATEX/IECEx). Always verify the specific certificate label on the unit before installation.

Field Installation Guidelines

  • Mounting: Ensure the flange is mounted vertically against the tank wall. Use a gasket compatible with both the flange rating and the chemical properties of the process fluid.
  • Zero Calibration: Perform a zero calibration after installation, especially if the transmitter is mounted at a significant height difference from the liquid level baseline.
  • Grounding: To ensure optimal performance of the sensor's EMI/RFI shielding, the transmitter housing must be grounded using the external grounding screw.
  • Wiring: Use shielded, twisted-pair cables. Ensure the cable entry glands are properly tightened to maintain the IP66/67 rating.