湖北杭荣电气有限公司是一家主要从事生产接近开关、光电开关、Hall IC霍尔开关、霍尔元件、两级跑偏开关、双向拉绳开关、速度监测器、皮带打滑开关、阻旋料位检测器、皮带纵向撕裂开关、矿用磁性井筒开关、倾斜开关，溜槽堵塞检测器、声光器、限位开关、行程开关、电梯开关、电梯称重传感器，电磁阀线圈、齿轮传感器、耐高温无源反馈传感器、冷热金属检测器传感器、速度旋转监测传感器,速度传感器、接近传感器、光电传感器、无触点磁性开关、磁性接近开关、皮带输送装置控制柜，等工控电器、试制；
磁性开关AL-20R，AL-21R图磁性开关AL-20R，AL-21R接近开关
磁性开关
AL-01R,AL-01N,AL-01P;
AL-02R, AL-02R, AL-02N,AL-02P;
AL-03R,AL-03R, AL-03N,AL-03P;
AL-04R,AL-04R, AL-04N,AL-04P;
AL-05R,AL-05R, AL-05N,AL-05P;
AL-06R,AL-06R,AL-06N,AL-06P;
AL-07R,AL-07R,AL-07N,AL-07P;
AL-08R,AL-08R,AL-08N,AL-08P;
AL-09R,AL-09R,AL-09N,AL-09P;
AL-10R,AL-10R,AL-10N,AL-10P;
AL-11R,AL-11R,AL-11N,AL-11P;
AL-12R,AL-12R,AL-12N,AL-12P;
AL-13R,AL-13R,AL-13N,AL-13P;
AL-14R,AL-04R,AL-14N,AL-14P;
AL-15R,AL-15R,AL-15N,AL-15P;
AL-16R,AL-16R,AL-16N,AL-16P;
AL-17R,AL-17R,AL-17N,AL-17P;
AL-18R,AL-18R,AL-18N,AL-18P;
AL-19R,AL-19R,AL-19N,AL-19P;
AL-20R,AL-20R,AL-20N,AL-20P;
AL-21R,AL-21R,AL-21N,AL-21P;
磁性开关AL-20R，AL-21R
