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Dissolved Oxygen – PME | Providing sensors and systems for monitoring water parameters. ✕Anti-Fouling Kit Maintenance Kit Maintenance Plan Wiper Maintenance Kit WIPER Bracket Wiper Replaceable Brushes USB Communication Cable Try now (760) 727-0300[email protected]1483 Poinsettia Ave. Suite 101 Vista, California, USA 92081Monday - Thursday 7:00am to 5:30pmProductsProductsminiDOT® Logger miniDOT® Clear Logger miniPAR Logger C-FLUOR Logger Cyclops-7 Logger T-Chain WIPER microDOT® Plus By ParameterDissolved Oxygen Temperature PAR Chlorophyll Fluorescein Dye Rhodamine WT Dye Turbidity CDOM/FDOM Blue-Green Algae Refined Fuels/Crude Oil Tryptophan Pressure Optical Brighteners Phycoerythrin miniDOT® Logger miniDOT® Clear Logger miniPAR Logger C-FLUOR Logger Cyclops-7 Logger T-Chain WIPER microDOT® Plus ParametersParametersDissolved Oxygen Temperature PAR Chlorophyll Fluorescein Dye Rhodamine WT Dye Turbidity CDOM/FDOM Blue-Green Algae Refined Fuels/Crude Oil Tryptophan Pressure Optical Brighteners Phycoerythrin Dissolved Oxygen Temperature PAR Chlorophyll Rhodamine WT Dye Fluorescein Dye Turbidity CDOM/FDOM Blue-Green Algae Refined Fuels/Crude Oil Tryptophan Pressure ApplicationsApplicationsCoastal/Ocean Surface Water Source/Raw Water  Wastewater Aquaculture Wetlands Harmful Algal Blooms  Aquaculture Coastal/Ocean Harmful Algal Blooms  Source and Raw Water  Surface Water Wetlands Wastewater Accessories Anti-Fouling Kit Maintenance Kit Maintenance Plan WIPER Maintenance Kit WIPER Bracket Wiper Replaceable Brushes USB Communication Cable OEM Integrator microDOT® Plus Resources Blog Case Studies Software Media/Press Published Works Field Calibration Adjustment Find a Distributor Referral Program Careers Events FAQ Support Company Contact Request a Quote ✕ ✕Products miniDOT® Logger miniDOT® Clear Logger miniPAR Logger C-FLUOR Logger Cyclops-7 Logger T-Chain WIPER microDOT® Plus Parameters Dissolved Oxygen Temperature PAR Chlorophyll Rhodamine WT Dye Fluorescein Dye Turbidity CDOM/FDOM Blue-Green Algae Refined Fuels/Crude Oil Tryptophan Pressure Applications Aquaculture Coastal/Ocean Harmful Algal Blooms  Source and Raw Water  Surface Water Wetlands Wastewater Accessories Anti-Fouling Kit Maintenance Kit Maintenance Plan WIPER Maintenance Kit WIPER Bracket Wiper Replaceable Brushes USB Communication Cable OEM Integrator microDOT® Plus Resources Blog Case Studies Software Media/Press Published Works Field Calibration Adjustment Find a Distributor Referral Program Careers Events FAQ Support Company Contact Request a Quote Water Quality ParametersDissolved Oxygen What is Dissolved Oxygen?Not quite like the oxygen we breathe, dissolved oxygen (DO) refers to the amount of oxygen present in a body of water. DO levels are one of the primary conditions that determine an aquatic environment’s ability to host flora and fauna, making it an essential indicator of water quality. The surrounding atmosphere and photosynthetic process of aquatic plants introduce DO into water systems, but living organisms like fish aren’t the only force depleting or consuming this DO. Bacteria also require DO to thrive, and in water with an overabundance of nutrients in the water, algal blooms can signal an upset in the ecological balance. With DO playing such a crucial role in the world’s water systems, accurately measuring DO levels is imperative for scientists who study aquatic ecosystems.

What is Dissolved Oxygen?Not quite like the oxygen we breathe, dissolved oxygen (DO) refers to the amount of oxygen present in a body of water. DO levels are one of the primary conditions that determine an aquatic environment’s ability to host flora and fauna, making it an essential indicator of water quality. The surrounding atmosphere and photosynthetic process of aquatic plants introduce DO into water systems, but living organisms like fish aren’t the only force depleting or consuming this DO. Bacteria also require DO to thrive, and in water with an overabundance of nutrients in the water, algal blooms can signal an upset in the ecological balance. With DO playing such a crucial role in the world’s water systems, accurately measuring DO levels is imperative for scientists who study aquatic ecosystems.

How Does Fluorescence Measure Dissolved Oxygen?

There are several common methods for measuring DO such as chemical or electrochemical analysis, but the fluorescence approach is by far the least labor-intensive. Fluorescence utilizes light interaction with oxygen molecules in the water, specifically the quenching property of oxygen, to calculate the DO saturation of the water. While physical interferences such as obstructing debris can interfere with sampling, several distinct advantages continue to attract researchers to fluorescence loggers.

Fluorescence measurements offer accuracy and precision in waters ranging from hypoxic to anoxic and are considered particularly sensitive to low DO. Furthermore, they require minimal water volumes to obtain accurate measurements and they require less maintenance and monitoring than other methods. These characteristics offer researchers the ability to take measurements over extended periods without attending to their logging devices continuously.

What Causes Variations in Dissolved Oxygen Levels?

While many factors can impact DO levels, temperature is closely linked to DO because cold water can hold oxygen with greater effectiveness than warm water. Some fluctuations in DO levels are common, such as those occurring in short-term increments over the course of a day or over long spells like seasonal shifting. A single water body can host a range of DO levels due to the dynamics of the water and organisms within or characteristics like depth. The levels of water, or its stratifications are frequently categorized by DO levels. Hypoxic areas host low levels of DO whereas anoxic conditions are completely devoid of it. Whether a study takes place just below the surface or at the bottom of the murky depths, DO’s presence or lack thereof acts as a touchstone measurement parameter for understanding the health of and trophic possibilities within our waters.

Products Measuring Dissolved Oxygen miniDOT® LoggerLearn More miniDOT® ClearLearn More T-ChainLearn More MicroDOT® PlusLearn More ProductsminiDOT® Logger miniDOT® Clear Logger miniPAR Logger C-FLUOR Logger Cyclops-7 Logger T-Chain WIPER microDOT® Plus AccessoriesAnti-Fouling Kit Maintenance Kit Maintenance Plan Wiper Maintenance Kit WIPER Bracket Wiper Replaceable Brushes USB Communication Cable ParametersDissolved Oxygen Temperature PAR Chlorophyll Fluorescein Dye Rhodamine WT Dye Turbidity CDOM/FDOM Blue-Green Algae Refined Fuels/Crude Oil Tryptophan Pressure Optical Brighteners Phycoerythrin ResourcesCareers Company Events FAQ Find a Distributor Partners In Research Privacy Policy Repairs Software Terms and Conditions Warranty

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Aquasend, Inc. helps aquafarmers worldwide more efficiently and affordably manage production by providing innovative technology that integrates water sensors, 24/7 real-time monitors and alerts. Our devices, the Aquasend Beacon® and miniDOT® Clear Logger, have proven to be valuable assets to several segments in the aquatic industry.

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(760) 727-0300[email protected]1483 Poinsettia Ave. Suite 101
Vista, California, USA 92081Follow UsSign UpGet notified of product updates and new releases:

ProductsminiDOT® Logger miniDOT® Clear Logger miniPAR Logger C-FLUOR Logger Cyclops-7 Logger T-Chain WIPER microDOT® Plus AccessoriesAnti-Fouling Kit Maintenance Kit Maintenance Plan Wiper Maintenance Kit WIPER Bracket Wiper Replaceable Brushes USB Communication Cable ParametersDissolved Oxygen Temperature PAR Chlorophyll Fluorescein Dye Rhodamine WT Dye Turbidity CDOM/FDOM Blue-Green Algae Refined Fuels/Crude Oil Tryptophan Pressure Optical Brighteners Phycoerythrin ApplicationsCoastal/Ocean Surface Water Source/Raw Water  Wastewater Aquaculture Wetlands Harmful Algal Blooms  ResourcesCareers Company Events FAQ Find a Distributor Partners In Research Privacy Policy Repairs Software Terms and Conditions Warranty

Aquasend, Inc. helps aquafarmers worldwide more efficiently and affordably manage production by providing innovative technology that integrates water sensors, 24/7 real-time monitors and alerts. Our devices, the Aquasend Beacon® and miniDOT® Clear Logger, have proven to be valuable assets to several segments in the aquatic industry.

© 2025 PME 

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