Free Chlorine 0.05 - 6 mg/L, EPA Approved, Bottle of 50

These Free Chlorine test strips combine a wide range of detection with our patented Free Chlorine indicator. Designed to resist interference from monochloramines. EPA approved for waterworks use. Sold in bottles of 50 and packets of 30 test strips, all of the reagents are impregnated on the test strip pad, and no external chemicals are needed to perform the test.