Level of magnetic flap depending on the different working environment, to produce a variety of materials to adapt to various environments and level gauges, including: hydraulic level gauge, UHZ-F anti-corrosion magnetic level gauge, insulation jacket flap level gauge, high temperature and pressure Magnetic Level, UHZ top-mounted magnetic float level gauge, HG5-1 glass level gauge, HG5-2 frost level gauge, HG5 glass tube type level meter, UNS (UGS) color quartz tube level gauge, UHZ-59 Series Magnetic turned column (board) level gauge and more types of products.