Yokogawa Electric Corporation K1143TC-0003-B Control Board

The Yokogawa K1143TC-0003-B control board is a dedicated PCB that handles sensor signal processing and internal control for conductivity measurements within Yokogawa IC402-C-E-1-EA conductivity analyzers. Designed for industrial liquid analysis, it is commonly installed in Yokogawa EXA conductivity analyzers used in chemical processing, water treatment, and other large-scale plants, where accurate sensor signal handling and robust communication are essential. The board mounts internally inside the analyzer housing and, as the replacement reference, aligns with K1143-0003-A, working with the associated K1543AH to manage measurement output, data communication, and control logic to maintain stable conductivity readings. Common replacements include Yokogawa K1143DB-0002-B, Yokogawa K1543DB, and IC402 complete electronics assemblies.