End Position Sensor In Hydraulic Systems And Pistons

Introduction

Finally there is a reliable way to precisely detect the end limit positions of pistons and cylinders, particularly when that detection is critical to the operation and/or can result in a disaster if the detection fails.  Mechanical limit switches have been used successfully in the past, but can fail prematurely or may have limited life cycles.  Dirty environments can exacerbate the problem.  Now designers have turned to the Reed Sensor which uses hermetically sealed reed switches, which are ideal for critical requirements where reliability is essential.

Full application writeup: End Position Sensor for Pistons and Hydraulic Cylinders

Features

• Contacts dynamically tested
• Cylindrical panel mount and screw fastening mounting
• Large sensing distances possible
• Magnet and reed sensor are isolated and have no physical contact by typically having the magnet mounted to the piston movement and the reed sensor mounted and positioned to detect the end limit position(s)
• Millions of reliable operations
• The permanent magnet is not affected by its environment
• The reed switch never comes in contact with the actual movement of the piston
• The reed switch used in the reed sensor is hermetically sealed and is therefore not sensitive to dirty environments