Potentiometers, trimmers, controls, and rheostats are variations of voltage dividers, and can be used to control electrical devices. In doing so, control circuits remain protected. An electrical-control device of this kind might be used to compare electro motive force of a cell, or to handle the significant amount of power on a pump or a respirator. Use this medical supplier directory to source potentiometers, trimmers, controls, rheostats, and other electronic components.