EJA110A_YOKOGAWA_PRODUCT_吉林易择科技技术发展有限公司

The Yokogawa EJA110A is a Differential Pressure (DP) Transmitter from the renowned EJA Series of pressure transmitters, which feature Yokogawa's unique Silicon Resonant Sensor technology.<br /> It is designed to measure the difference between two pressures (ΔP = High-side pressure - Low-side pressure). This measurement is fundamental for calculating flow (when used with a primary element like an orifice plate, venturi tube, or flow nozzle), level in closed tanks, and filter/pipe clogging monitoring.

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Parameters
Parameter Category Specification for EJA110A
Model Number EJA110A
Product Name Differential Pressure Transmitter
Sensor Technology Silicon Resonant Sensor. The sensor vibrates at a natural frequency, which changes with applied pressure. This change in frequency is detected and converted into a highly precise pressure measurement.
Measurement Range Various codes available, covering a wide range. Common examples:
• Code 1: 0-0.5 to 10 kPa (0-2 to 40 inH₂O)
• Code 3: 0-1 to 100 kPa (0-4 to 400 inH₂O)
• Code 5: 0-5 to 500 kPa (0-20 to 2000 inH₂O)
• Code 7: 0-0.14 to 14 MPa (0-20 to 2000 psi)
Output Signal • Standard: 4 to 20 mA DC, 2-wire system, with HART protocol (Bell 202 FSK) superimposed on the analog signal.
• Digital: BRAIN or HART protocol for full configuration and diagnostics.
Power Supply Loop-powered.
• Operating Voltage: 10.5 to 42 V DC (Standard)
• Load Resistance: 0 to 1375 Ω (at 42 V DC)
Accuracy ±0.075% of span (for URL ≥ 3 kPa). This is an exceptionally high accuracy for a process transmitter.
Long-Term Stability ±0.1% of URL per 10 years (for URL ≥ 3 kPa), reducing maintenance needs.
Temperature Effect ±0.15% of URL per 10°C (for zero and span, combined).
Static Pressure Effect ±0.2% of URL per 7 MPa (1000 psi) (for zero). Minimal effect on span.
Process Connection • High/Low Pressure: 1/4" NPT female (Standard). Other connections (e.g., 1/2" NPT, ANSI/DIN flanges) are available.
Electrical Connection • 1/2" NPT conduit connection.
• Terminal block for easy wiring.
Materials of Construction • Sensor Diaphragm: 316L SST, Hastelloy C-276, etc.
• Process Housing (Flanges): 316 SST, Carbon Steel, etc.
Materials vary based on model suffix and ordered specifications.
Display (Optional) • Local Indicator: A digital display (LCD) can be added to show pressure, percentage, or engineering units.
Adjustments • Zero and Span: Adjustable via the local buttons or a HART/BRAIN communicator.
Ambient Temperature • -40 to 85°C (-40 to 185°F)
Process Temperature • -40 to 120°C (-40 to 248°F) (for general purpose)