Manual soap dispensers
The design of a manual soap dispenser usually depends on whether the soap is in liquid, powder or foam form.
Automatic soap dispensers
Automatic soap dispensers are especially hands-free soaps (liquid soaps and foam soaps), but are often used for other liquids, such as hand soap, shampoo or hand soap. Automatic dispensers are usually battery-powered. The non-contact design dispenses liquid when the sensor detects motion below the nozzle. The electronic parts of the automatic soap dispenser allow a timing device or signal (sound, light, etc.) that can indicate to the user whether they have washed their hands correctly.