CAL Check™ standards for Free & Total Chlorine (liquid), 0.0 and 1.00 ppm
The HI-96724-11 Free and Total Chlorine CAL Check standards provides a simple solution to calibrating and validating the HI-96724 Free and Total Chlorine Portable Photometer that has a 0.00 to 5.00 mg/L (ppm) range.