Socket & See 400V Industrial Socket Tester SOK65/32HD
Features:
Tough rubber holster for heavy duty use
Phases clearly identified as L1, L2, L3
Instant Phase sequence is given by 3 green LED's 'rotating' clockwise with a continuous tone or 3 red LED's 'rotating' counter clockwise with a warbling tone
Protective conductor (earth) present is indicated by green LED