Analog and digital sensors are accurate and reliable over the long term. Here we explain how to choose them for industrial automation and motioncontrol applications. We define and describe the benefits of digital and analog sensors and give industrial examples. Then we apply design principles and best practices to detail a custom magnetic-sensing solution for an industrial application
Industrial automation and motion designs, such as conveyors, elevators and pick-and-place machinery, must function within factories subject to dust and dirt. These designs often exhibit high vibration and spikes in shock force as well. Such conditions can threaten the stability of sensor circuits. Fortunately, some custom magnetic sensors sport features to ensure long-term accuracy and reliability. Consider an application that must verify when an object such as an elevator door is closed. Here, digital versions of reed and Hall-effect sensors deliver outstanding reliability.
Basics of digital reed switches This electrical switch requires no power to operate. A glass tube with precious metal hermetically seals its contacts.
  
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October 2015
DESIGN WORLD
 
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