Some switch applications reside in uncontrolled environments where temperature, humidity level, and airborne debris fluctuate at any given time. In these types of environments, it is recommended to utilize a sealed switch, which is specifically designed and manufactured to protect against foreign bodies and moisture. Electro-mechanical switches can be sealed to different levels of effectiveness against intrusion from moisture and foreign bodies, like tools, fingers, dirt, and debris. The seal effectiveness level is ranked according to the international classification system specified by the IEC60529, known as the IP Rate. IP stands for “International Protection” Rating or “Ingress Protection” Rating.