This instrument is primarily used to monitor phosphorus compounds, which exist in various forms of phosphates in water, and nitrogen-containing chemicals in various forms in water. The automatic monitoring device is widely used in fields such as wastewater monitoring points, surface water monitoring stations, river sections, and drinking water source monitoring stations.

By altering external conditions such as water pressure and flow rate, a localized low pressure is created when the water passes through the nozzle. This causes the water to vaporize and explode, generating a large number of microbubbles. These unstable microbubbles quickly collapse, releasing high pressure and temperature, while the surrounding water is rapidly compressed inward, forming high-speed "jets." This process can be used for cleaning underwater building biofouling.