Martindale-PSI4000-Non-Contact-Phase-Sequence-Indicator-Martindale-MARPSI4000-P-The-Martindale-PSI4000-is-a-unique-phase-rotation-indicator-that-carries-out-the-measurement-via-inductive-crocodile-clips-This-method-increases-the-safety-of-the-user-whilst-the-bright-LEDs-give-a-clear-indication-of-either-clockwise-or-anti-clockwise-phase-rotation-P-P-The-design-of-this-phase-rotation-tester-allows-for-use-on-either-insulated-or-uninsulated-conductors-&-an-Enhanced-Brightness-switch