pH test strips are widely used to measure the acidity or alkalinity of a solution in various fields. In laboratories, they are essential for quick pH checks during experiments, ensuring the correct conditions for chemical reactions. In the food and beverage industry, these strips help monitor the pH levels to maintain product quality and safety, such as in brewing, dairy processing, and canning. In agriculture, they are used to test soil pH, aiding in determining the suitability of soil for specific crops and guiding the application of fertilizers or lime. In healthcare, pH test strips are employed to monitor bodily fluids, such as urine or saliva, for diagnostic purposes or to assess overall health. They are also used in aquariums and swimming pools to maintain optimal water conditions for aquatic life or safe swimming. Their simplicity, affordability, and portability make them a convenient tool for pH measurement in diverse applications.