Digital pH Meter Lutron PH-201 is a compact, waterproof, and portable device designed for precise pH measurement in liquids. It features a durable mini electrode with a 25mm immersion depth, providing superior performance and easy installation. With a wide 0–14 pH range, clear LCD display, and simple calibration, it delivers fast, accurate results for laboratories, water treatment, and environmental testing.  Applications: aquariums, swimming pools, and fish hatcheries. Widely used in laboratories, schools, and colleges for research and testing. Also used in the planting industry, beverage production, food processing, paper manufacturing, photography, and quality control.