磁性开关、AL-18R气缸磁性开关可替代台湾磁性开关CS1-A磁性开关用于检测气缸行程的位置，不需再行程两端设置机控阀（或行程开关）及其安装架，不需要在活塞杆端部设置撞块，所以使用方便、结构紧凑。可靠性高，寿命长、成本低、开关反应时间快，故得到广泛应用。
气缸磁性开关工作原理
气缸磁性开关是将磁性开关装在气缸的缸筒外侧。气缸可以使各种型号的气缸，但缸筒必须是导磁性弱、隔磁性强的材料，如硬铝、不锈钢、黄铜等。在非磁性体的活塞上安装一个永磁铁（橡胶磁铁）的磁环，随活塞移动的磁环靠近开关时，舌簧开关的两根磁片被磁化而相互吸引，触点闭合；当磁环移开开关后，磁片失磁，触点断开。出点闭合或断开时发出电信号（或使电信号消失），控制相应电磁阀完成切换动作。如下图所示。磁性开关内部一般还带有开关动作的指示灯和过电压保护电路，用树脂塑封在一个壳体内。
磁性开关、AL-18R｜气缸专用磁性开关｜磁感应开关
AL-01R,AL-01RD,AL-01N,AL-01P，
AL-02R, AL-02RD, AL-02N,AL-02P,
AL-03R,AL-03RD, AL-03N,AL-03P
AL-04R,AL-04RD, AL-04N,AL-04P
AL-05R,AL-05RD, AL-05N,AL-05P,
AL-06R,AL-06RD,AL-06N,AL-06P，
AL-07R,AL-07RD,AL-07N,AL-07P
AL-08R,AL-08RD,AL-08N,AL-08P,
AL-09R,AL-09RD,AL-09N,AL-09P
AL-10R,AL-10RD,AL-10N,AL-10P
AL-11R,AL-11RD,AL-11N,AL-11P
AL-12R,AL-12RD,AL-12N,AL-12P
AL-13R,AL-13RD,AL-13N,AL-13P
AL-14R,AL-04RD,AL-14N,AL-14P
AL-15R,AL-15RD,AL-15N,AL-15P
AL-16R,AL-16RD,AL-16N,AL-16P
AL-17R,AL-17RD,AL-17N,AL-17P
AL-18R,AL-18RD,AL-18N,AL-18P
AL-19R,AL-19RD,AL-19N,AL-19P
AL-20R,AL-20RD,AL-20N,AL-20P
AL-21R,AL-21RD,AL-21N,AL-21P
AL-22R,AL-22RD,AL-22N,AL-22P
AL-23R,AL-23RD,AL-23N,AL-23P
AL-24R,AL-24RD,AL-24N,AL-24P
AL-25R,AL-25RD,AL-25N,AL-25P
AL-26R,AL-26RD,AL-26N,AL-26P
AL-27R,AL-27RD,AL-27N,AL-27P
AL-28R,AL-28RD,AL-28N,AL-28P
AL-29R,AL-29RD,AL-29N,AL-29P
AL-30R,AL-30RD,AL-30N,AL-30P