EAO’s Series 18 tactile, compact, actuators and indicators have been designed for use in the latest generation of laboratory & measuring equipment, medical equipment, audio & video applications, lighting and stage control systems. These are said to deliver tactile feedback and outstanding illumination; and, depending on the model, they  occupy just 9 x 9mm or 14 x 14mm of the panel face. series 18 pic 2 medium
 
Available in flush or raised variants, the devices are suitable for 12 or 24VDC low current applications. The connection terminals of the devices can be mechanically connected or soldered. The switches are built with gold-plated nickel contacts and are available with normally open or normally closed snap-action contacts. The operational state of the switch is apparent at all times from the position of the lens. 
 
The non-reflecting flat lenses can be supplied transparent and in a wide variety of colours and sizes, and in round, square and rectangular formats.