Compare Quick view Extech 1000A 3-Phase Power Analyzer / Datalogger (50Hz) Extech 382091 £821.40 The versatile Extech 382091 1000A 3-Phase Power Analyzer / Datalogger (50Hz) is an excellent instrument for clamp-on True RMS power measurements with software for Harmonics analysis and offers additional function of current measurements up... £821.40 Compare Quick view