+3 Chlorine Dioxide CLO2 Test Strip BE4EVX3 $20.18 In stock Quantity: 1 Add to Bag Product Details Chlorine Dioxide CLO2 Insta-TEST® is a convenient way to test for Chlorine Dioxide levels in sanitized water. Range and sensitivity is 0, 10, 25, 50, 100, 250, 500 ppm. Save this product for later Favorite