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• Snap Action, Limit Switches:
• Application field:
  • Limit switches are available in a variety of configurations, making them suitable for many different applications. They are used in various devices and machinery, such as vending machines, robotics, refrigerators, medical equipment, consumer electronics and security systems. They are also used in commercial and industrial systems for machine parts, process controllers, variable frequency drives and programmable devices.
  • One of the most common applications for limit switches is to act as a safety device. In this case, the limit switch is used to detect when a certain pressure or force threshold is exceeded and shut down the system before the damage is done.
  • The limit switch can also be used to provide feedback from a process control system. This might be used, for example, to detect when a specific level is reached and switch off the motor. Limit switches can also be used in light control systems, as well as in industrial equipment for tracking movement, position, and speed.
• Working principle:
  • Limit switches are simple electromechanical devices, which detect the presence or absence of an object in their operating range. The operating range is determined by the type of switch and can be anything from millimeters to kilometers.
  • At the heart of the limit switch lies a lever, arm, or roller, which moves when an object passes through its range. This movement activates the switch and sends a signal to an electrical circuit. This signal can then be used to control a motor, light, or other device.
  • Most limit switches are designed to operate only once; they reset themselves after they are deactivated. However, some types of limit switches are designed to operate continuously, sending a signal to the circuit continuously while in range.
  • Limit switches are also an important safety feature in many machines. For example, a door limit switch can be used to detect when a door or other object is opened and then send a signal to the control system, which halts the operation of the machine until the door is closed.

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