Infinite Switch Controls

These are rotary switches used on electric ranges, hot plates, warming drawers, and many other applications to control the amount of power dissipated by a heating element.

An infinite switch, also known as simmerstat, energy regulator, or infinite controller, allows the power output of a heating element to be variable. The switches are named "infinite" because, instead of only allowing a few or specific switched power  levels, its average power output is infinitely variable.