The E18S series incremental rotary encoders feature ultra-compact Ø18 mm size housings and ultra-lightweight (12 g) design. The small size and light weight allows easy installation in tight or limited spaces. The low moment of inertia of the shaft minimizes the effect on the rotation of applied equipment. The miniature encoders are ideal for small machinery including ATMs, bill counters, copy machines, and other compact-sized machinery.