A guard is a device designed or fitted to prevent injury or damage. Guards in commercial foodservice equipment may include fan guards, splash guards, bread guards, lamp/bulb guards,sneeze guards, kinfe/blade guards and many others.
In foodservice equipment, a knob may be as simple as a push button or "palm button". A control knob is a rotary control used to provide input to a device when grasped by an operator and turned, so that the degree of rotation corresponds to the desired input . Such knobs are one of the most common components in restaurant equipment control systems and are used to modulate a wide variety of settings such as temperature, viscosity, speed and more.