The Elspec G4500 BlackBox takes portable power quality analysers & power monitoring to a whole new level by using the revolutionary PQZIP patent algorithm. The unique algorithm Enables you to measure, store & analyse (continuously) waveform signals regardless their size.  Elspec’s pioneering measurement method utilizes a dual-range gain of 2 x 16 Bit to yield, a superior accuracy far surpassing IEC 61000-4-30 Class A requirements, thereby capturing the finest details & deviations in Power Quality parameters.