Providing accurate and reliable valve position monitoring,the APL-series limit switch boxes are designed for quarterturn valve applications (0 to 909) used in many industries: Chemical & petrochemical,Municipal wastewater,Power plant,Oil refinery,Marine, General industry, A wide range of product with many switch and other accessory options cover various customer needs: cost-effec-tive, corrosive/ hostile environments, enclosure standards(IP67, IP68, NEMA 4, 4X, 6, flame-proof, intrinsic safety),higher/ lower operating temperature, multiple cable entries,3-way or 5-way valve applications, current position signal-ling, solenoid valve, and many more.The housings of standard APL-series are die cast aluminium.To provide high corrosion resistance, they are chromate coated and polyester powder coating is further applied. Thehousing of APL-5 is available in either aluminium die cast,316 stainless steel, or 316L stainless steel.Limit switches can be widely used in the three-coordinate control and limit of lifting and transmission machinery in construction, port, mining and other industries.