At first glance, you may ask why dry film thickness measurement speeds are important, especially if only a small number of readings need to be taken at any one location. Imagine two inspectors measuring the dry film thickness either side of a pipeline. Both tasked to take 3 spot measurements every 5 metres. If Inspector 1 is using a gauge that takes 70 readings per minute, and Inspector 2, a gauge with 40 readings per minute, it will not be too long before Inspector 1 is a long way ahead of Inspector 2.
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