The Hoyt 3100 series panel meters consists of a popular industrial styled Polycarbonate case that is available for surface, window or bezel mounting applications in 4 sizes: 1-1/2", 2-1/2", 3-1/2" and 4-1/2".
This series of meters is directly equivalent in mounting and specifications to similar styled meters of other manufactures. Spring loaded pivot and jewel movement that assures maximum torque and readabilty.  Dials are 100 or 90 degree arc, black lettering on white background. Special dial colors and artwork are available as an option.