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Difference between sampling device and filter of water quality instrument The filter just removes some granular objects.Water purifiers are harmful substances such as some heavy metal ions in the water through certain chemical or adsorption.Filter is an indispensable device on the pipeline of conveying media,It is usually installed in the inlet end of the pressure reducing valve, pressure relief valve, fixed water level valve, and other equipment of the square filter.After the filter has a filter cartridge of a certain size filter,Its impurities are blocked,When cleaning is needed,Just remove the removable cartridge,After processing, you can reload it,Therefore,It is extremely convenient to use and maintain.Water purifier is also called water purifier, water filter,The core of its technology is the filter film in the filter device,The main technology of water purifier comes from two kinds of UF membrane and RO reverse osmosis membrane,It is a small water treatment equipment for deep purification of water