Learn about limit switches and which one is right for your application.
Switches for object detection are incredibly versatile. You can get them with all kinds of doo-dads, rollers, springs, wands, arms, plungers, etc - and most industrial switches can be reconfigured. On this guy for example, you can change the length of the arm, the starting position of the arm and even rotate the head to 4 different positions. Be careful the head is usually spring loaded Mechanical switches are available in all kinds of shapes and sizes, low medium and heavy duty grades, and in materials from plastic to stainless steel for full wash down applications. Just pick the one that fits your needs, wire it up to the PLC and you're good to go. The biggest drawback with mechanical switches is they have moving parts so they can wear out over time. So you really want to use mechanical switches in applications where they won't be activated often. Cabinet door openings, gate lifting, machine over travel limits, things like that. That should be enough to get you started with simple switches. Check out the live demo How To videos to learn how to connect these to a PLC and then program the PLC to use them. If you have any questions about industrial switches, please don't hesitate to call Automation Directs free award winning tech support during regular business hours. They will be happy to help. And don't forget the forums there are lots of folks there that love to share their years of experience. Just don't post any support questions there. Automation Directs tech support doesn't monitor the forums on a regular basis.