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Ruoshui 4091C ESR Meter: Overview, teardown, demonstration

In this video, I present the Ruoshui 4091C ESR Meter, one of the many brandings of what is apparently another 'brand-less' Chinese electronic product. I choose the RuoShui version over the (perhaps more common) equivalent East Tester ET44xx series and the Victor branded versions because I could only by those from Chinese sellers on eBay, whereas the Ruoshui was available from a seller on Amazon....as it turned out, it still ended up shipping from China. The upside was that I ordered a somewhat less versatile model, and the seller's warehouse accidentally shipped their top-of-the-line model. This meter was entirely new to me when making this video, so viewers will watch along as I do an overview of the internal and external features, and do some experiments verifying its basic operations.