Editing Miniature snap-action switch (section)

== Applications ==

Microswitches have two main areas of application:

* Firstly, they are used when a low operating force with a clearly defined action is needed.
* Secondly, they are used when long-term reliability is needed. This is a result of the internal mechanism and the independence of the closing force on the switch contacts from the operating force. Switch reliability is largely a question of the contact force: a force that is reliably adequate, but never excessive, encourages long life.

Common applications of micro switches include the door [[Interlock (engineering)|interlock]] on a [[microwave oven]], leveling and safety switches in [[elevator]]s, [[vending machine]]s, [[Arcade game|arcade]] buttons, and to detect paper jams or other faults in photocopiers. Microswitches are commonly used in tamper switches on [[gate valve]]s on [[fire sprinkler system]]s and other [[Plumbing|water pipe]] systems, where it is necessary to know if a valve has been opened or shut.

Micro switches are very widely used; among their applications are [[Home appliance|appliances]], [[machine]]ry, industrial controls, [[vehicle]]s, [[convertible]] tops, and many other places for control of electrical circuits. They are usually rated to carry current in control circuits only, although some switches can be directly used to control small motors, [[solenoid]]s, lamps, or other devices. Special low-force versions can sense coins in vending machines, or with a vane attached, airflow. Microswitches may be directly operated by a mechanism, or maybe packaged as part of a [[pressure]], flow, or [[temperature]] switch, operated by a sensing mechanism such as a [[Bourdon tube]]. In these latter applications, the repeatability of the actuator position when switching happens is essential for long-term accuracy. A motor-driven cam (usually relatively slow-speed) and one or more micro switches form a timer mechanism. The snap-switch mechanism can be enclosed in a metal housing including actuating levers, plungers, or rollers, forming a [[limit switch]] useful for control of machine tools or electrically-driven machinery.