This guide covers the full IP rating chart, explains what every digit and letter means, compares IP65 vs IP66 vs IP67 vs IP68, shows NEMA equivalents, and gives specific recommendations for actuator applications. Available in both plastic and aluminum material options, Polycase's IP68-rated enclosures come in a variety of sizes and styles, including. Industrial enclosures exposed to dust, rainwater, or submerged environments risk critical failures – from dust-clogged heat sinks to catastrophic short circuits. " Whether you're selecting a linear actuator for an outdoor installation, choosing electronics for a marine environment, or specifying equipment for a. IP stands for Ingress Protection (also sometimes called Ingress Rating or Ingress Level), defined under the IEC 60529 standard. The “IP” is followed by two digits (sometimes extended with letters), denoting protection levels against solid ingress (dust, particulates) and liquid ingress (water. The IEC has developed the ingress protection (IP) ratings, which grade the resistance of an enclosure against the intrusion of dust or liquids Electric and electronic equipment deteriorate or malfunction when water or dust enters the device. IP67: Dust-tight and protected against temporary immersion (1 meter for 30 minutes).