Intended for applications such as audio, aircraft, medical and test equipment, a panel mount optical encoder from CUI has a 2-bit quadrature resolution. The C14 series has a 16 or 32 angle of throw position along with three shaft options that include 3.175 mm with slotted end, 6 mm diameter round, and 6.35 mm with D-cut. Detent options include 16, 32, or non-detent. A push switch is available and there are four termination options including solder holes, 130 mm cable with connector, pcb mount, and panel mount. From $23.