In the event of you gaining information about impedance analyzer, you should rest assured that it would be best described as a type of electronic test equipment. It would be used for measuring various kinds of complex electrical impedance as a function of test frequency.
It would be pertinent to mention here that impedance has been an essential parameter specifically used to characterize electrical circuits, electronic components, along with the materials used for making the components. However, when it comes to buying the best products, you should look for the best company as well. Among the several companies that you could come across, your best bet would be Hioki.