EN12-HN22AF18 is a 12 mm rotary encoder from the EN12 Series featuring 2-bit gray code output and incremental/contacting operation with a metal bushing and shaft. The encoder supports 12 or 24 pulses per revolution with a maximum operating speed of 100 RPM, closed circuit resistance of 3 Ohms maximum, and contact rating of 1 mA at 5 Vdc. It offers excellent electrical performance with dielectric strength of 300 Vac at 1 mA for 1 minute, insulation resistance of 100 MO at 250 Vdc, and minimal contact bounce of 5.0 ms maximum at 15 RPM. The encoder features a flatted shaft with 18 mm length (17.5 mm actual) and 5 mm bushing length, continuous mechanical travel with selectable detents (0, 12, or 24 per revolution), and a rotational torque of 1.4 oz-in maximum. This RoHS 2 compliant encoder is ideal for industrial control panels, audio equipment, and precision instrumentation requiring reliable rotational position feedback.