The I81-A2Z M20 with Limit Switch; NC x2; 5A; max.240VAC; max.24VDC; M20; IP66; -30÷75°C manufactured by Bernstein is a two-port (NC) limit switch that is designed to detect the actuation of a mechanical device. It has a maximum current rating of 5A, is rated for up to 240VAC and 24VDC, with an M20 thread size, an IP66 protection rating, and can operate in temperatures ranging from -30°C to 75°C. It is typically used for safety monitoring of hoppers, doors, covers, and gates in industrial machinery, and other such applications.