What is the difference between the PowerSpy2 and a classical low cost powermeter ?
First, the PowerSpy2 allows to get precise measurements of low powers, down to 10mW, whereas classical power meters have a far lower sensititivy. This is key to measure standby currents of electronic equipments.
Then, the PowerSpy2 not only measure an RMS power, but is a real oscilloscope and allows to analyse current and voltage waveforms. So it provides far more advanced features than usual powermeters : harmonic distorsion measurement, optimisation of AC/DC switching power supplies, etc. The Bluetooth interface allows also automatic and configurable report generation.
Finally, PowerSpy2 can operate in autonomous data logging mode with performance and features unmatched on the market: voltage, current and power can be recorded by example every 20 milliseconds and for over a month!