Components of a process analyser

As stated above, there is a large variety of process analysers adapted to particular needs however, most of them have the following elements in common (a) a sampling system (b) the analyser proper (c) the result delivery system and (d) the analyser protection. 

Experience has shown that the sampling system of a process analyser is as important as or even more so than the analyser itself. On the other hand, the analyser must be duly protected to ensure smooth functioning and a reasonably long lifetime with consequent reliability and profitability. Hence, both elements are commented on here in greater detail. 

Process analysers, like computers, can only provide accurate results if they are fed with appropriate starting materials —samples and information. Sophisticated electronics cannot compensate for erroneous designs. As stated above, each process unit requires a specially designed sampling system. However, most sampling systems have a series of common features and specifications, namely  

Every sampling system has two distinct parts the sample conditioning system and the system for sample collection, transport and removal. 

The sample conditioning system functions to change the nature of the sample extracted from the process line to adapt it to the analyser requirements. This is equivalent to the sample pretreatment carried out in the laboratory and involves the following steps  

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