All of the equipment that is used to indicate and govern the state of the industrial computerization machinery is known as Human Machine Interface (HMI). There is a wide variety of such interfaces and can be anything ranging from a simple LED status signal generator to a complex 20-inch touch interface panel. HMI uses demand sturdiness of the mechanical devices including resistance against variable temperature and environmental conditions and a protected communication environment in some cases. All HMIs are supposed to come with Ingress Protection (IP) grades of up to IP65, IP67, and IP68. The latest technology and exclusive microprocessors and devices let the designers fulfill all such demands coupled with improved BOM.