就像電感式傳感器一樣，電容式傳感器檢測目標(biāo)物也是非接觸式的。電容式傳感器既能檢測導(dǎo)電性材料同時(shí)又能檢測非導(dǎo)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(dǎo)性材料物體。

在實(shí)際應(yīng)用中，電容式接近開關(guān)的靈敏度取決于被檢目標(biāo)物的材料特性。比如金屬，塑料或者液體等目標(biāo)物的材料特性會(huì)影響電容式傳感器的感應(yīng)距離，因而被檢測到的動(dòng)作點(diǎn)也會(huì)各不相同。考慮到這些材料不同引起的差異，倍加福提供很多產(chǎn)品都是可調(diào)靈敏度的，從而使這些傳感器在實(shí)際應(yīng)用中變得更加靈活。

在某些電感式傳感器不適用的應(yīng)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(guān),德國P+F電容式接近開關(guān)

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）