Contains 100 mL. Hydrotech is a premium quality 1000 ppm (mg/L) and 1382 ppm TDS Calibration Solution that are produced with high-quality Sodium Chloride and high quality Purified/Pure Water (ISO 9001:2008 ; ISO 13485:2012). Equipment used in preparation of the solutions include certified weight-checked balances, Class A glassware, and certified thermometers. Be sure your meters are accurate by calibrating with Hydrotech TDS Calibration Solution.
Directions for Use: 1. Place TDS meter probe in the calibration solution. 2. After the reading on TDS meter is steady, adjust meter to give correct reading. 3. Rinse probe with water.