Bourns PER21 Long-Life Incremental Ring Encoder offers a 21mm package diameter with 10mA at 5VDC contact rating and 2-bit quadrature code output. The PER21 provides haptic detent feedback, a through-hole mounting style, and a high-class rotational feel. Bourns PER21 Long-Life Incremental Ring Encoder operates in a temperature range of -10°C to +60°C. Typical applications include professional audio equipment, low- to medium-risk medical and diagnostic equipment, consumer white goods, and industrial automation controls.