Federal, state, and local health regulations require the use of test kits to verify the strength of sanitizer solutions. Hydrion test strips are a quick, reliable, and economical solution for this. Test strips are available to test quaternary ammonium, chlorine, and iodine-based sanitizers. Strips provide a visual color-change indication of solution strength. Each 15-ft (4.6-m) roll comes with a color match chart and is clearly labeled. Each roll provides enough paper for about 100 tests.