5SE218-3

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Snap action, limit switches are one of the most widely used and versatile sensors. Their primary use is to detect the presence of an object or an obstruction, or to act as a limit switch for equipment to alert and stop the machinery if an object obstructed or moved beyond its intended range. The 5SE218-3 is an example of snap action, limit switch, and in this article it will focus on the application field and working principle of the 5SE218-3, without titling the article.The 5SE218-3 is a progressive type snap-action limit switch. It is designed with single-pole double-throw (SPDT) contacts, actuation speed of 0.1 millisecond, and 20,000 mechanical cycles. It has a standard operating temperature range of -20 – 60 ℃. It is also waterproof and oil-resistant, with an environmental rating of IP67. It can withstand shocks and vibrations of 10-500 Hz, and has an insulation resistance of more than 100 megaohms. It has a terminal arrangement that allows easy installation and wiring.The 5SE218-3 is a versatile device, and can be used in a wide variety of applications. Some of the most common uses are: safety sensors in machines, position sensing in automatic doors and gates, limit and non-contact control in industrial robots, home appliance control, and environment monitoring sensors. The 5SE218-3 works using a principle called snap action. This is a mechanism where a switch or contact shifts from one state to another when a set amount of force is applied. When the force exceeds a threshold, the contact “snaps” from one state to another, abruptly interrupting or completing the electrical circuit. This mechanism was designed to act quickly and accurately, and is widely used in automation where very fast detection is required.The 5SE218-3 consists of a control arm, a contact arm, a contact block, and a cam. When the control arm is triggered by an external force, the contact arm is brought into contact with the contact block. This causes the cam to rotate, which shifts the contact arm to the “open” or “closed” position, depending on the cam’s angle. The contact arm is spring-loaded and can be adjusted to operate at different force thresholds.In summary, the 5SE218-3 is a versatile snap action, limit switch that can be used in a variety of applications. It works through the principle of snap action, shifting its contact when a certain amount of force is applied. It is a durable device, designed with SPDT contacts, shock and vibration resistance, and an operating temperature range of -20 – 60 ℃. Its use can be seen in safety sensors, industrial robots, automatic doors, home appliances, and environment monitoring.

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