Blue TDS Meter standard purified water every day with

purified water every day with trusted ZeroWater filtration technology

Anyone brewing with Third Wave Water or ZeroWater who wants to verify mineral balance

Automatic Shutoff: Saves battery life when not in use

Certified by IAPMO to NSF standards

Stay refreshed and hydrated wherever life takes you with the ZeroWater On-the-Go Drinking Bottle

Blue TDS Meter standard purified water every day withTDS Meter A TDS meter measures the total number of dissolved solids in drinking water in parts per million (ppm). The meter calculates the TDS content in the water. The higher the value, the more solids are dissolved in the water. The ZeroWater TDS meter is included in every ZeroWater water jug and filter system and can be ordered separately here (in case you want one extra or first want to measure your TDS before buying a jug). Click here to download