The requirement for miniature optical sensors to meet the demands of medical and semiconductor automation equipment often exceeds the capabilities of standard self-contained optical sensors.
What is the first thing that comes to mind if someone says “proximity sensor?” My guess is the inductive sensor, and justly so because it is the most used sensor in automation today.
Engineers have developed several ways to detect extension or retraction of a pneumatic cylinder. Anisotropic magnetoresistive and giant magnetoresistive sensors are smaller, faster and reliable alternatives.
