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Yokogawa EJA210A-EMSA1F5B-97DN/FF1/D1/A/HC/N4 Flange Mounted Differential Pressure Transmitter

Yokogawa EJA210A-EMSA1F5B-97DN/FF1/D1/A/HC/N4 Flange Mounted Differential Pressure Transmitter

The Yokogawa EJA210A-EMSA1F5B-97DN/FF1/D1/A/HC/N4 is a high-performance, flange-mounted differential pressure transmitter engineered for precision liquid level measurement in industrial tanks. This model leverages Yokogawa’s advanced DPharp sensor technology for robust, stable...

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SKU: EJA210A-EMSA1F5B-97DN/FF1/D1/A/HC/N4
Vendor: Yokogawa
Category: Flange Mounted Differential Pressure Transmitter
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The Yokogawa EJA210A-EMSA1F5B-97DN/FF1/D1/A/HC/N4 is a high-performance, flange-mounted differential pressure transmitter engineered for precision liquid level measurement in industrial tanks. This model leverages Yokogawa’s advanced DPharp sensor technology for robust, stable measurement.

Model Suffix Code Breakdown

  • EJA210A: Base model for flange-mounted differential pressure transmitter.
  • E: Output signal (4 to 20 mA DC).
  • M: Measurement span (Medium pressure range).
  • S: Wetted parts material (Stainless Steel 316L).
  • A: Process connection (Standard flange size/rating).
  • 1: Fill fluid (Silicone oil).
  • F5B: Flange rating and material specifications.
  • 97DN/FF1/D1/HC/A/N4: Configuration options including explosion protection (FM/ATEX/IECEx), integral local indicator, Hastelloy C diaphragms, and specific mounting hardware.

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 fluid)
Power Supply 10.5 to 42 V DC
Protocol HART 5/7, FOUNDATION Fieldbus, or BRAIN

Sensing Technology

The EJA210A utilizes the proprietary DPharp silicon resonant sensor. By employing micro-resonators to measure pressure as frequency, this technology provides exceptional accuracy and long-term stability while remaining largely immune to ambient temperature fluctuations or changes in static pressure.

Frequently Asked Questions

  • Q: What is the benefit of the 'HC' (Hastelloy C) option in this model?
    • A: The 'HC' suffix indicates that the wetted diaphragms are constructed from Hastelloy C, providing superior resistance to chemical corrosion compared to standard 316 stainless steel, making it ideal for aggressive process fluids.
  • Q: Is this transmitter suitable for hazardous area installations?
    • A: Yes. The included 'FF1' option signifies compliance with stringent international explosion-proof certifications (e.g., FM, ATEX, IECEx). Ensure local installation practices comply with the specific certificate label on the unit.

Field Installation Guidelines

  • Flange Mounting: Secure the flange to the tank nozzle using a gasket compatible with both the flange pressure rating and the chemical nature of the process fluid.
  • Grounding: For effective EMI/RFI noise rejection, the transmitter housing must be securely bonded to the plant ground using the external grounding screw.
  • Zero Calibration: Perform a zero-point check after final mounting, particularly if the transmitter is installed at a significant vertical offset from the tank's reference level.
  • Wiring: Utilize shielded, twisted-pair cabling. Always ensure the cable glands are tightened correctly to maintain the unit's IP66/67 environmental protection rating.