LEF 430-00-12-26-00-31-LC4 is an ATEX-certified explosion-proof limit switch box by LEF Industries (France), with Vestamid® housing, IP65 protection, 2 intrinsic safety NAMUR inductive sensors, Ex ia IIC T6 for Zone 1/2 gas & Zone 21/22 dust hazardous areas. It adopts ISO F05 mounting, VDI/VDE 3845 stainless steel NAMUR shaft & bracket, visual position indicator, M20×1.5 cable entry, operating at -20℃ to +60℃, designed for reliable position feedback of quarter-turn pneumatic/electric valves in petrochemical, oil & gas and other explosive environments.