Chembio Chlorine Test Strips 0 - 300 PPM (50 pieces) It is a test method used to measure the chlorine content of water or liquids. These test strips are especially used to determine chlorine levels in pool water, drinking water, water treatment systems and industrial plants. ChMBIO Chlorine test strips allow you to get easy and quick results. By dipping the strips into water, you can measure the chlorine level with color changes as a result of chemical reaction. The color scale on the strips is used to determine the chlorine level. The chlorine level measured in the PPM (Million per piece) unit can be precisely determined by the strips used. These chlorine test strips are important to provide safe and healthy water. It is vital to monitor the chlorine levels of pools or drinking water systems and to prevent the growth of microorganisms. In water treatment systems used in industrial facilities, the right chlorine level is also necessary for operations and production.