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 and an Enhanced Brightness switch
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