This handheld water quality fast measurement recorder is a new type of intelligent handheld testing instrument, which is designed with the latest digital integrated circuit technology and international detection technology. Its large-size full-color liquid crystal display can display the reading in real time. At the same time, it uses the digital chip design of international manufacturers to achieve very high sensitivity and excellent repeatability. Moreover, the recorder integrates measurement, storage, recording and analysis, and can be widely used in water treatment, aquaculture, environmental monitoring and other industries. According to different options, it can be used to measure acid-base, conductivity, ammonia nitrogen concentration, turbidity, dissolved oxygen, COD and other elements in water.