Features: Experience comprehensive water quality analysis with the online conductivity water quality tester, featuring a double probes designs (dm1 and dm2) for simultaneous monitoring of multiple parameters. Equipped with advance sensors technology, this device ensures high precise tds measurements, making it suitable for various water conditions. For home users concerned about drinking water safety, aquarium enthusiasts ensuring pet health, and researcher conducting water quality experiments. Perfect for use in diverses setting such as household tap water testing, aquarium management, and laboratory research, providing realtime data for informes decision making. With durablity abs material and excellent waterproof performances, this tester is designing to withstands humid environment, offering reliable service across different applications. Specifications: Component:ABS Model:DM1/DM2 Size:Approx.45x18x75mm/1.77x0.7x2.95inch Package Includes: 1 Set Water Quality Monitoring Tool note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.