湖北杭榮電氣有限公司是一家主要從事生產接近開關、光電開關、Hall IC霍爾開關、霍爾元件、兩級跑偏開關、雙向拉繩開關、速度監測器、皮帶打滑開關、阻旋料位檢測器、皮帶縱向撕裂開關、礦用磁性井筒開關、傾斜開關，溜槽堵塞檢測器、聲光器、限位開關、行程開關、電梯開關、電梯稱重傳感器，電磁閥線圈、齒輪傳感器、耐高溫無源反饋傳感器、冷熱金屬檢測器傳感器、速度旋轉監測傳感器,速度傳感器、接近傳感器、光電傳感器、無觸點磁性開關、磁性接近開關、皮帶輸送裝置控制柜，等工控電器、試制；
磁性開關AL-20R，AL-21R圖磁性開關AL-20R，AL-21R接近開關
磁性開關
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;
磁性開關AL-20R，AL-21R
