What is meant by weatherproof construction and what are ingress protection standards?
Instruments meant for outdoor installations have to face the harsh outdoor environment. They need to have a weatherproof construction. Certain standards have been defined for weather proofness. They are termed as IP followed by a number. Egs. IP20, IP40, IP55, IP65, IP67. IP means ingress protection. The standards define the smallest particle size that should not enter the enclosure under specified conditions. The details of test conditions and severity are mentioned in ISI specification literature. Independent laboratories authorized for environmental testing issue certificates signifying up to what level of material ingression the enclosure can withstand.
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