The common eBay, Chinese, postage stamp size scales for £10-14 that claim to weigh 0.01g are really cr&p. Not just the outrageous accuracy claims, but many will disintegrate when they've been in contact with water treatment salts (the stainless steel ones go rusty!). I've got through a few of these.
0.01g is about the weight of a piece of paper the size of a printed full stop (as it was described to me). Analytical scales will weigh to four decimal places! Analytical scales are in a big box to protest them from slight draughts. Obviously you don't want four decimal places, and probably not two either. But I did stumble into the need to weigh (reliably) to 0.01g, and it was brewing related! I got these
Digital Scales. Sold out but that (dodgy?) site has plenty of alternatives and some good "buying" information.
My use (apart from weighing hops and water salts) is:
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Pyknometers! Well I have issues with hydrometers and refractometers (visual issues). It was getting this sorted that convinced me the "postage stamp" sized Chinese/eBay ones are cr&p.