Socket and See SOK60/16HD Industrial 3 Phase 4pin Socket Tester 16amp 400v 415v with Phase Rotation\n\nThe Socket & See SOK60/16HD Industrial Socket Tester is a robust 4-pin tester designed for high-voltage 3-phase circuits. With a durable rubber holster, it is built to withstand tough industrial environments. This tester instantly identifies the phase sequence and clearly labels phases as L1, L2, or L3. When used alongside the ADP60 adapter, it can test 32A industrial sockets.\n\nThe SOK60 features an intuitive rotating LED system that delivers easy-to-interpret results. Each phase is indicated with an LED, and if all three phases are connected, the LEDs will rotate in a clockwise direction, accompanied by a continuous tone. If the phases are incorrectly wired, the LEDs will rotate counterclockwise, and a warbling tone will sound. The absence of any phase is also detectable, with the corresponding LED failing to light, and the other two LEDs flashing to indicate the presence of ;