Door Jam Ajar Switch

Description

A door jam ajar switch, also known as a door ajar switch, is a type of switch that is used to detect when a door is open or closed. It is typically located in the door jamb, near the hinges. When the door is closed, the switch makes contact and completes an electrical circuit. When the door is opened, the switch breaks the circuit.

Door jam ajar switches are used in a variety of applications, including:

• Vehicles: In vehicles, door jam ajar switches are used to turn on the interior lights when a door is opened, and to alert the driver if a door is open when the vehicle is moving.
• Security systems: Door jam ajar switches can be used in security systems to detect when a door is opened, which can trigger an alarm.
• Home automation systems: Door jam ajar switches can be used in home automation systems to control lights, thermostats, and other devices.

Door jam ajar switches are typically simple devices, consisting of two metal contacts that are held together by a spring. When the door is closed, the contacts make contact and complete the circuit. When the door is opened, the contacts break apart and the circuit is interrupted.

Door jam ajar switches can be either mechanical or electronic. Mechanical door jam ajar switches are the simplest type, and they work by using a spring to hold the contacts together. Electronic door jam ajar switches are more complex, and they use a sensor to detect when the door is open or closed.

Door jam ajar switches are an important safety feature in many applications. By detecting when a door is open, they can help to prevent accidents and injuries.