Digital Water Tester with Probe Sensor Versatile tester designed for aquaculture, swimming pools, saltwater and seawater systems, and aquariums. It combines a probe sensor with digital measurements for reliable readings. Multiparameter measurement: monitors salt level (salinity), pH, and water temperature. Delivers accurate test results to support stable water quality. Easy to use: simple operation and clear digital display make it suitable for both professional and use. Ready for quick checks and routine monitoring. Durable and practical: built with sturdy materials, resistant to impact and deformation, and designed for regular use in marine and pool environments. Use scenarios Marine aquarium maintenance: routinely check salinity and pH to maintain healthy conditions for fish and corals. Saltwater pool management: verify salt balance and pH to ensure safe, comfortable swimming. Seawater systems and aquaculture: monitor temperature and salinity in outdoor ponds or other seawater setups for consistent stock health.