WLCA2-2NTS

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Snap action limit switches detect the position of a moving part, or an object’s physical parameters such as pressure, temperature and flow rate, and convert them into electrical signals to provide the required output for a control system. The WLCA2-2NTS series snap action limit switch is such a device, and it works in multiple applications.

Applications

The WLCA2-2NTS is a single-pole, double-throw type, snap action limit switch capable of being used in both commercial and industrial settings. It can be installed in a wide range of applications, including:

• Door / window position sensing
• Indicating a malfunction in mechanical components
• Controlling electric systems
• Automating machine functions

In a residential environment, the WLCA2-2NTS can be used to alert a homeowner when doors or windows are opened or closed. In commercial and industrial settings, the WLCA2-2NTS can be used to indicate when mechanical components have malfunctioned or when mechanical functions need to be automated.

Working Principle

The WLCA2-2NTS utilizes a snap-action switch element which is operated by a cam-operated lever. The lever is attached to the moving part or object being sensed, and is connected to the switch element assembly. When the object moves, its speed and distance travel actuates the lever causing it to rotate, pushing the snap-action switch element against a spring-loaded contact arm.

The contact arm is automatically positioned in the closed state. When the lever actuates the switch element, the contact arm is compressed and displaced away from its normal position, opening the electrical contacts. When the lever rotates back, the spring-loaded contact arm resumes its normal position, closing the electrical contacts again.

The WLCA2-2NTS uses an adjustable paddle arm which is located near the point of actuation on the lever, allowing the user to adjust the amount of displacement required before the electrical contacts open or close. This means that the limit switch can be set to detect objects at different distances and speeds.

In addition to being adjustable, the WLCA2-2NTS is also UL and CSA approved and can be used in high ambient temperature applications. The device is also available with a rating of IP67 and can be used in wet or dusty environments.

Conclusion

The WLCA2-2NTS is a reliable snap action limit switch which can be used in a variety of applications. The adjustable paddle arm allows for adjustment of the device’s sensitivity, making it well-suited for a variety of sensing needs. In addition, the device is UL and CSA approved and rated for use in high ambient temperatures and wet or dusty environments.

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