Isokinetic stack sampling

Isokinetic sampling is a technique used to collect particles in a moving stream which moves at the same velocity in the sampling nozzle as elsewhere in the stream. This can increase the accuracy and reliability of results. It is used for activities like monitoring pollution in factory stacks, taking general air samples in an area of interest, and checking equipment for dust and other concerns.

In an isokinetic sampling procedure, the sampling nozzle is set up to allow the sample stream to enter without changing speed. This reduces the risk of concentrating larger or smaller particles.

Due to the risks involved in especially stack samples, isokinetic sampling is a costly and painstaking process.