Chemical testers are devices or kits used to analyze the composition of substances. They can detect the presence of specific chemicals, measure pH levels, or identify contaminants in liquids, solids, or gases. These testers are commonly used in laboratories, environmental monitoring, and quality control in various industries. There are different types of chemical testers, including pH meters, litmus paper, and spectrophotometers. Each type serves a unique purpose, such as measuring acidity or analyzing light absorption in solutions. Chemical testers play a crucial role in ensuring safety and compliance in fields like pharmaceuticals, food production, and water quality testing.