Dissolved Oxygen Monitor Lutron DO 5509 is a reliable and high-precision dissolved oxygen meter designed to measure dissolved oxygen levels, a key indicator of water quality in aquatic environments. This portable dissolved oxygen meter comes with a high-quality probe and works as an accurate digital DO meter and water quality tester. It is ideal for biology, chemistry, ecology, and environmental science applications, making it a dependable dissolved oxygen meter for labs and field use. Temperature compensation ensures accurate readings, while the clear LCD and user-friendly interface support easy operation and reliable performance Applications: Aquarium, Medical research, Agriculture, Fish hatcheries, Laboratory, Water conditioning, Mining industry, Schools & Colleges, Quality control etc.