The HI96700C Ammonia Low Range Photometer combines accuracy and ease of use in an ergonomic, portable design. A user can accurately determine the concentration of ammonia (as NH3-N) in freshwater samples within a 0.00 to 3.00 mg/L (ppm) range using the HI93700-0 ready made reagents. The HI96700C offers many advanced features including the exclusive CAL Check™ function used for performance verification and calibration of the meter.