Power Window Sensor

Introduction

Power windows have been improving their performance over the years and they now use reed sensors to control the motors as they reach their end limits.  Also, if an object impedes the window's progress, slowing the windows progress, this slowdown must be detected, particularly when going in the closing position.  This is particularly important if one's arm or hand is between the top of the window and door.  Reed Sensors have been an excellent choice capable of accomplishing all three requirements in a reliable manner...

Full application write-up: Reed Sensor Monitors Vehicle Power Windows

Features

• Contacts dynamically tested
• Cylindrical hole and screw fastening mounting
• Magnet and reed sensor are isolated and have no physical contact by typically having the magnet mounted on the window motor and the reed sensors mounted and positioned to accurately detect the motor rotation
• The reed switch used in the reed sensor is hermetically sealed and is therefore not sensitive to rough, wet environments
• The permanent magnet is not affected by its environment
• Tens of millions of reliable operations
• Surface mount and through hole packages available