Hydrion CM-240 Chlorine Test Strips 10-200ppm – 100 Count Vial

Noble Chemical CM-240 chlorine test strips are the simple, reliable, and economical way to measure the concentration of free available chlorine in sanitizing solutions. Each strip measures concentrations between 10-200ppm (parts per million), with color matches at 10, 50, 100 and 200ppm.