就像電感式傳感器一樣，電容式傳感器檢測目標物也是非接觸式的。電容式傳感器既能檢測導電性材料同時又能檢測非導電性材料，然而我們通常用于檢測塑料，液體，粉末狀和粒狀物等非電導性材料物體。

在實際應用中，電容式接近開關的靈敏度取決于被檢目標物的材料特性。比如金屬，塑料或者液體等目標物的材料特性會影響電容式傳感器的感應距離，因而被檢測到的動作點也會各不相同�？紤]到這些材料不同引起的差異，倍加福提供很多產品都是可調靈敏度的，從而使這些傳感器在實際應用中變得更加靈活。

在某些電感式傳感器不適用的應用場合，這些電容式的傳感器就是您的另一種可選方案。

P+F電容式接近開關,德國P+F電容式接近開關

Palm buttons offer an ergonomic alternative to mechanical push buttons. Operators using ergonomic safety palm buttons can dramatically reduce the risk of repetitive motion injuries, since the palm buttons need only a light touch to activate.  Some palm button models can even sense the operator's hands through heavy gloves!
 
These capacitive palm buttons are designed for use with standard two-hand machine control, are immune to most radio frequency interference, and offer continual self-checking electronics.  Redundant output relays with one way guided contacts ensure reliable operation The palm buttons are UL listed with U.S. and Canadian standards.
 
Palm button assemblies include:

• Cover plate & gasket
• Hub box & ring guard
• Hub box & u-channel guard
• FS box assembly （optional）