The HI96727 Color of Water Portable Photometer combines accuracy and ease of use in an ergonomic, portable design. The meter can accurately determine the color of water within a 0 to 500 PCU (Platinum Cobalt Units) range by simply by taking a reading with a filtered sample. The HI96727 offers many advanced features including the exclusive CAL Check™ function used for performance verification and calibration of the meter.