The HI96738 Chlorine Dioxide Portable Photometer combines accuracy and ease of use in an ergonomic, portable design. Using the HI93738-0 ready-made reagents a user can accurately determine the concentration of chlorine dioxide within a 0.00 to 2.00 mg/L (ppm) range. The HI96738 offers many advanced features including the exclusive CAL Check™ function used for performance verification and calibration of the meter.