TDS Meters - Which one are you using?

[BillyJoeJimBob]

I'm looking to buy a TDS meter. Just wondering which brands people are using and your experiences with them. Is there anything to watch out for? Are some more accurate than others?

[BillyJoeJimBob]

bump

[AZDesertRat]

HM Digital COM-100, its the most accurate meter on the market. It can be calibrated in three different modes to get extreme low end accuracy.

[bnmir]

What the difference (if any) between TDS and EC meters?

[AZDesertRat]

TDS is a mathematical way of expressing conductivity. It does not gow down as low as microseimens or megaohms though on the low or Deionized water end. The COM-100 can actually measure about 10x lower than 0 TDS for true semiconductor grade water.