Mxmoonfree Optical DO Meter Easy and Fast Readings Optical sensors are a convenient solution because they do not require incoming water flow or membrane replacement on a regular basis. They can be reused numerous times. Minimal maintenance required. No need for solution refill or frequent membrane change. Manual salinity compensation available, suitable for both fresh and saltwater. Air pressure compensation available. Supports [Automatic Mode] and [Manual Mode] for direct in-air calibration. 5M Extension Probe A longer cord for testing oxygen and temp deeper in the water. Longer lines can measure DO at greater depths, shallow lakes (typically mean depths less than 8 feet) can remain well-mixed and oxygenated from surface to bottom over long periods of time. In contrast, deep-ocean lakes are generally devoid of oxygen, and the oxygen content of the water column is typically much lower than that of surface waters. Large Backlit Screen Clear even at night. LCD screen with adjustable backlight time, adapt to the night and the field of water quality monitoring work. 2 Months Plus Battery Life Accompany you from autumn to winter. Built-in a rechargeable high-quality lithium battery, a charge can be used for 2-3 months, say goodbye to range anxiety. Model SHC-1 D.O. Range 0~20mg/L or 0~200% D.O. Accuracy 1% Dissolved Oxygen Sensor Drift <1% per year Sensor Material POM and Stainless Steel Temp. Range 0~40℃ Temp. Accuracy ± 0.2℃ Measuring Distance 5M (16 Ft) Sensor Cleaning Cycle According to water condition and measuring frequency Working Temperature -20℃ ~50℃ Weight 3.5 lb Data Storage No Salinity Range 0 to 100 ppt Power Source 5V Testing Parameter Dissolved oxygen, temperature Why we need to measure dissolved oxygen? Any healthy aquatic system that can support aerobic life must have a specific level of oxygen; normally, healthy bodies of water have at least 5 mg/L of dissolved oxygen. DO levels of less than 5 mg/L ca What is the principle of optical dissolved oxygen probe？ The sensor has two parts: one that creates light and the other that detects it. The detected light will be weaker or stronger depending on whether there is more or less oxygen in the water. Will this work for measuring DO in wine? Yes, works great for measuring DO in wine.