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Updated: Jun 28, 2026

High-precision Electromagnetic Flowmeter with Empty Pipe Detection via Complex Programmable Logic Device-based Waveform Recognition
Published on: June 27, 2025
Operator-free flow injection analyser
1Instituto de Quimica - Universidade Estadual de Campinas C.P. 6154 Campinas SP CEP 13081 Brazil.
Abstract:
A flow injection analyser has been constructed to allow an operator-free determination of up to 40 samples. Besides the usual FIA apparatus, the analyser includes a home-made sample introduction device made with three electromechanical three-way valves and an auto-sampler from Technicon which has been adapted to be commanded by an external digital signal. The analyser is controlled by a single board SDK-8085 microcomputer. The necessary interface to couple the analyser components to the microcomputer is also described. The analyser was evaluated for a Cr(VI)-FIA determination showing a very good performance with a relative standard deviation for 15 signals from the injection of 100 mul of a 1.0 mg.ml(-1) standard Cr(VI) solution being equal to 0.5%.
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