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AAI143-H50/K4A00

The Yokogawa AAI143-H50/K4A00 is a flange-mounted absolute pressure transmitter from the DPharp EJA-E Series. It is designed for high-accuracy absolute pressure measurement in demanding industrial applications such as vacuum systems, distillation columns, and high-pressure processes. The transmitter features Yokogawa's single-crystal silicon resonant sensor technology, ensuring exceptional long-term stability and reliability. The model suffix /K4A00 indicates specific configuration options, typically including Hastelloy C276 diaphragm material and standard calibration, ensuring compatibility with corrosive process media.

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Key Parameters
Parameter Category Specification Details
Model Code AAI143-H50/K4A00
Product Line DPharp EJA-E Series
Type Flange-Mounted Absolute Pressure Transmitter
Measurement Absolute Pressure
Output Signal 4-20 mA DC with HART® protocol (2-wire)
Accuracy ±0.055% of URL (including linearity, hysteresis, repeatability)
Upper Range Limit (URL) Example: 0-100 kPa abs (specific range depends on sensor code)
Process Connection Flange (e.g., 2-inch 150# RF)
Flange Material Stainless Steel (316SS)
Diaphragm Material Hastelloy C276 (specified by /K4A00 option)
Fill Fluid Silicone oil or fluorocarbon (depending on option)
Ambient Temperature -40°C to 85°C
Process Temperature -40°C to 120°C (standard fill fluid)
Pressure Rating Flange rating: 150# ANSI (higher ratings available)
Isolation Input/output/power triple isolation
Enclosure Rating IP67 (NEMA 4X)
Certifications SIL 2, CE, ATEX, IECEx (options)
Power Supply 10.5-42 V DC
Typical Applications
Vacuum system monitoring

Distillation column pressure measurement

High-pressure process control in corrosive environments

Chemical and petrochemical processes