A chlorine dioxide test strip is used to test ClO2 concentration in liquid without the use of field kits or reagents. GardnClean GC Liquid Chlorine Dioxide Test Strips High, 0-500 ppm [Vial of 50 Strips] Chlorine dioxide test strip is used to test ClO2 concentration in liquid without the use of field kits or reagents 0 to 500 ppm range Vial include 50 test strips Desiccant vial with flip-top lid preserves freshness of strips New and improved packaging each bottle now has the lot number and expiry date printed on it to ensure compliance with the most stringent requirements
