A humidity switch is a type of light switch that is designed to be safe to use in damp or wet environments, such as a wet room or a swimming pool area. These switches are specially designed to prevent water from meeting the electrical components of the switch, reducing the risk of electric shock or other hazards.

Humidity switches can be either mechanical or touch-sensitive, and they are typically made from materials such as stainless steel or polycarbonate which are resistant to corrosion and moisture damage. They may also have a higher level of protection against water ingress, such as an IP67 rating, to ensure that they can withstand the moisture and humidity of wet environments.