ASTM F2865-13

5.1 Ingression protection classifications are widely used by manufacturers for specifying the level of protection offered by enclosures.

5.2 An example of such a classification scheme is IEC 60529. Membrane switch manufacturers are often asked to meet these standards, however the test methods specified within these standards do not address considerations specific to membrane switches.

5.3 The MSIP classification system considers the membrane switch separately from the testing and IP codes used for classifying the enclosure when subject to similar test conditions.

5.4 Ingression testing can be useful to identify design deficiencies.