1. Product Introduction The KNF-1500 is a portable handheld multi-parameter water quality detector designed for field measurement of dissolved oxygen, pH, ORP, conductivity, salinity, TDS, turbidity, temperature and more. The handheld meter supports up to 4 sensor inputs that can be freely combined, and each sensor is automatically recognized by the meter once connected, so operators can switch measurement parameters on site without reconfiguration. A backlit LCD, short-cut