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I'm looking at trying to measure TDS on two boilers, one water, one steam. It looks like what's commonly sold as a TDS meter is really just measuring conductivity and calibrating that somehow to show TDS. Would one of those meters give me a reasonable number out of the box, would I need to calibrate the adjustment factor myself, or ???
Any suggestions for a good TDS meter? www.tequipment.net has a selection, starting at about $45. There's a cheap(?) combo unit that measures TDS, salinity, & pH at the same time. Good idea?