No purge or plant air is needed for the 2720KB nonincendive hazardous area HMI. This unit has FM approval for Class I, II and III, Div. 2. The series has a NEMA 4X stainless steel enclosure that features beveled edges and a slope top for easy cleaning. It includes a standard integrated membrane keyboard with sealed optical trackball. Full-color high-definition industrial displays are available up to 24 in. Users can custom-build the right HMI for an application. Options include touchscreens, KVM extenders, thin client, cooling systems, keyboards, pointing devices, keyed latches, pedestals, swing arm and wall-mount brackets.