This book talks about sensors: inductive, capacitive, magnetic, optical, vision systems, encoders, and others. Sensors to detect strength, position, level, shape, or color.The operating principles and construction characteristics are explained.Practical examples are given, and typical applications are shown with a guide to choose.It is suggested how to draw sensors in electrical patterns and how to electrically connect them.What's in this book that I couldn't find on the Internet? Nothing. But there isn't a website on the Internet that treats all these devices in a single document that's easy and quick to consult and full of images.