Standard inductive proximity sensors have already for several decades been used to detect metal, be it in a plant or on a machine. They are far from perfect, since the sensing distance varies with the kind of metal that needs to be detected.

The standard inductive proximity switches are designed for wear-free and non-contact detection of metal objects. Basically the sensing distance is related to the size, diameter and length of the sensor. When sensing different metals, ferrous and non-ferrous, the sensing distance changes. With non-ferrous metals, it is being reduced. Which causes an adjustment of the position of the sensor, in oder to be able to detect the non-ferrous metal. In other words, you have to put the sensor closer to the metal.

Factor 1 inductive proximity sensors on the other hand can detect all metals at the same distance without adjustment of their position. Fewer types can cover different applications, reducing inventory. There is also a reduction in maintenance, since you have more mounting flexibility, causing less failure.

Factor 1 sensors are inherently weld field immune. They are ideal for industries that need to sense multiple different metals in unique sensing environments, like car manufacturing plants. And last but not least factor 1 sensors are able to increase your bottom line.

Frank Heymans has been working with sensors for the last 18 years, starting in 1988. Since 1998 he has been advising sensor users on applications. Starting this 2006, he is willing to share his knowledge via his website http://askthesensorspecialist.hegatrading.com/e107/page.php?9