I've been having some real trouble understanding which hydrometers are necessary for operations. Does anyone know of a guide for the hydrometers needed for operation? I know we need to have NIST-certified equipment for proofing and gauging, but don't understand the ranges of SG for which we need. Can anyone share a list of ranges, use, quantity and whether NIST certified of your hydrometers?
We're ready to spend on these, but want to make sure we're spending correctly. I've seen a few posts on this, but there seems to be some variance on how many hydrometers most folks purchase and the numbe