What Is an Auto Switch?
An auto switch, also known as an auto-detection switch, is a position-detection device designed to identify magnets in machinery such as air and hydraulic cylinders. Unlike infrared sensors, which can degrade over time, auto switches use permanent magnets for reliable, long-term detection. They are typically easy to install on cylinders, making them user-friendly.
Uses of Auto Switches
Auto switches are primarily used with cylinders, incorporating magnets at both ends to monitor their positions. They are essential in systems like PLCs for detecting the extension and retraction of cylinders, aiding in operations like confirming retraction, extension, and free movement detection.
Principle of Auto Switches
There are two main types of auto switches: contact and non-contact. contact auto switches use mechanical reed switches that bend near magnets to create an electrical connection and signal output. Although they have a shorter lifespan due to moving parts, they are straightforward in terms of electrical handling.
Non-contact auto switches use a magnetic detection element and electronic circuitry for signal generation and amplification, offering a longer lifespan as they lack mechanical contacts.
Auto switches operate on magnetic forces, allowing them to detect and signal at any position along a cylinder with multiple adjustment stages. The sensor gradually detects the magnet as it approaches and outputs a signal when a specific threshold is surpassed. For multi-stage adjustments, careful tuning of the installation position is necessary while verifying the operation.