Refill for EV 8508 and EV 8510. Testing water has never been easier. These simple-to-use kits provide fast, accurate results with little preparation. Choose between CHEMets® Self-Filling Ampoules or Titrets® Hand-Held Titration Cells. The most frequently run tests of surface and drinking water quality are listed below contain 30 reagent ampoules, color comparator, titration cell (depending on type of kit), sample cup, accessory solutions (if needed) and instructions. Refill packs of 30 solution ampoules are available (see table below). MSDS sheets are provided in test kits.