1. Professional water tester Digital pH tester with monitoring, pH and EC meter and measurement capabilities in a single digital water tester. Provides clear readings to assess water quality. 2. Meter digital water tester Built from durable material that is not easy to break or deform, providing reliable performance and longterm use in various environments. 3. Probe sensor tester Lightweight and portable, small in size and easy to carry to any location for on the go monitoring and measurement checks. 4. Seawater tester Plastic material and workmanship designed for durability, offering a practical and reliable probe sensor tester for seawater testing. Use scenarios Home and office water quality checks: evaluate drinking water, pool water, and general household water for pH and conductivity to ensure safety and suitability. Hydroponics and gardening: monitor and adjust nutrient solution pH and conductivity to optimize plant growth and health. Seawater and marine hobby use: perform quick seawater testing for aquariums, reef tanks, or field marine environments with durable, portable testing capability.