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Instrumentation Reference Book, 4th Edition by Walt Boyes

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Chapter 39. Sampling
J.G. Giles

39.1. Introduction

39.1.1. Importance of Sampling

Any form of analysis instrument can only be as effective as its sampling system. Analysis instruments are out of commission more frequently due to trouble in the sampling system than to any other cause. Therefore time and care expended in designing and installing an efficient sampling system is well repaid in the saving of servicing time and dependability of instrument readings. The object of a sampling system is to obtain a truly representative sample of the solid, liquid, or gas which is to be analyzed, at an adequate and steady rate, and transport it without change to the analysis instrument, and all precautions necessary should be taken to ensure that this happens. ...

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