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EJA430A-EAS4B

The Yokogawa EJA430A-EAS4B is a high-performance Absolute Pressure (AP) Transmitter from the acclaimed EJA-E Series. It is designed for highly accurate and stable measurement of absolute pressure in various industrial processes, including distillation columns, evaporators, and other applications where pressure measurement referenced to a perfect vacuum is critical.

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Category Specification for Model EJA430A-EAS4B
Model Code EJA430A-EAS4B
*Breakdown: EJA430A (Absolute Pressure) - E (Output Code) - A (4" Flange) - S4 (Specified Flange) - B (Bracket / Option)*
Type Absolute Pressure (AP) Transmitter
Process Connection 4-inch (100 mm) Flush Diaphragm with ANSI/ASME RF flange (likely 150# or 300# rating). The exact flange standard and rating are defined by the order code.
Measuring Range URL (Upper Range Limit): Ranges from 0.5 to 10,000 kPa (approx. 0.07 to 1450 psi.a). The specific range is factory-set.
Accuracy ±0.2% of calibrated span (for ranges ≥ 100 kPa / 14.5 psi.a). Accuracy varies by range; consult datasheet for details. High-accuracy options are available.
Output Signal 4 to 20 mA DC (Analog) with superimposed HART® 7 digital communication.
Power Supply 10.5 to 42 V DC (Standard for HART communication)
Electrical Connection 1/2" NPT conduit connection
Display (Optional) Local LCD Indicator (Model code would include -D if pre-equipped, e.g., -EAS4B-D)
Housing Material Aluminum die-cast (standard), providing protection rating of IP67 / NEMA 4X.
Wetted Parts Materials Diaphragm: 316L Stainless Steel (standard). Flange & Process Contact Parts: 316 SST (standard). Other materials like Hastelloy C-276 are available.
Protection Rating IP67, NEMA 4X (Weatherproof, dust-tight, and resistant to water immersion)
Process Temperature -40 to 120 °C (-40 to 248 °F) for general type.
Ambient Temperature -40 to 85 °C (-40 to 185 °F)
Communication Protocol HART® 7 (Latest version with analog + digital signal)
Safety Integrity Level (SIL) Capable of SIL 2 (Hardware Fault Tolerance 0) or SIL 3 (Hardware Fault Tolerance 1) certification as per IEC 61508.