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Cite this document
Industry, having recognized water as an essential engineering material, is frequently called upon to evaluate its properties, both from the standpoint of its use and its disposal. In checking the quality of an industrial water or an industrial waste water, proper sampling is a most important factor. The application of automatic features to sampling provides the same sort of benefits that the application of automatic processes has introduced into so many other fields. It has been stated that sampling is the operation of removing a part, convenient in size for testing, from a whole of greater bulk in such a way that the distribution of the constituent or quality to be tested is the same in both the whole and the part removed or sampled (1). This definition of sampling will naturally hold for automatic as well as for manual procedures. In order to obtain a meaningful sample, the accuracy and character of the analysis to be made and the interpretation to be put on the results must, of course, be considered. Whether the sample for analysis may be required intermittently or continuously will naturally affect the design of the sampling apparatus. The amount of the sample to be taken is also important. Sometimes a balance will have to be struck between having enough sample and withdrawing an uneconomically large portion of the stream.
Madarasz, M. F.
Ford Motor Co., Dearborn, Mich.