### Features 1. Oxygen and temperature measurement: This dissolved oxygen meter can be used to measure dissolved oxygen and temperature. The built-in microcomputer processor will calculate and compensate all measurement data related to dissolved oxygen and temperature. 2. Detachable probe: This dissolved oxygen sensor uses a detachable probe, which is easy to replace, and is equipped with 6 probe protection sleeves. 3. Digital screen display: This dissolved oxygen tester uses a digital screen display, making data reading clearer and more convenient. If it is not used for 8 minutes, it supports automatic shutdown. 4. Temperature compensation: The solubility of oxygen is affected by temperature, atmospheric pressure, and salinity. Our instrument with temperature compensation function can meet daily use requirements. 5. Wide application: This dissolved oxygen meter is widely used in aquariums, swimming pools, ponds, freshwater aquaculture, marine aquaculture, school teaching experiments, laboratory sterile environments, aquaculture, scientific research, and other fields. ### Package contents 1. 1 dissolved oxygen meter (without battery) 2. 1 dissolved oxygen electrode 3. 6 sets of oxygen membranes 4. 1 user manual 5. 1 bottle of dissolved oxygen filling solution