High-Precision Measurement: The Digital Dissolved Oxygen Meter DO9100 provides accurate readings for dissolved oxygen levels, making it an essential tool for both seawater freshwater environments. Versatile Application: Ideal for use in fish tanks aquaculture settings, the DO9100 Dissolved Oxygen Analyzer ensures optimal conditions for aquatic life by monitoring oxygen levels effectively. User-Friendly Design: With its intuitive interface, the Digital Dissolved Oxygen Meter DO9100 allows for easy operation, enabling users to obtain quick reliable measurements without any hassle. Durable Reliable: Built to withst the dems of aquaculture, this Dissolved Oxygen Analyzer is designed for longevity, ensuring consistent performance whether used in freshwater or seawater applications. Essential for Healthy Ecosystems: Regular use of the Digital Dissolved Oxygen Meter DO9100 helps maintain healthy fish populations aquatic ecosystems by providing real-time data on oxygen saturation levels. Colour:black Material:Plastic and Metal note:Not including 3LR44 batteries Package Contents: 1 dissolved oxygen meter 1 electrode 6 replaceable electrode tips Only the above package content, other products are not included. Note: Light reflection different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is and\/- 1-3cm.