ST-15 Endless Rotation 15mm Potentiometers Amphenol Piher ST-15 Endless Rotation 15mm Potentiometers are engineered to serve as a cost-effective control potentiometer for home appliances and automotive applications. These devices offer 360° mechanical rotation angle, up to 340° electrical rotation angle, and up to 51 mechanical detents. The ST-15 series is designed to last up to 200,000 life cycles. Amphenol Piher ST-15 Endless Rotation 15mm Potentiometers include IP54 protection and a selection of shafts and knobs. Applications include appliance program selection, thermostat adjustment, HVAC control / sensor, consumer electronics, power tool controls, and automotive control.