oxygen measurement technology Articles

  • Dissolved oxygen measurements in aquatic environments: The effects of changing temperature and pressure on three sensor technologies

    Dissolved oxygen (DO) is probably the most important parameter related to water quality and biological habitat in aquatic environments. In situ DO sensors are some of the most valuable tools used by scientists and engineers for the evaluation of water quality in aquatic ecosystems. Presently, we cannot accurately measure DO concentrations under variable temperature and pressure conditions. ...

  • In-Situ® Rugged Dissolved Oxygen (RDO®) Sensors Use the Latest Advancements in Optical Measurement Technology

    Dissolved oxygen (DO) is one of the most important parameters monitored when evaluating water quality, aquatic biology, and other environmental and industrial processes. The In-Situ Rugged Dissolved Oxygen (RDO) Sensor measures DO using the latest advancements in optical measurement technology. Water quality professionals will benefit from In-Situ Inc.'s investment in new product development. By ...


    By In-Situ, Inc.

  • Trace Oxygen measuring systems for Reflow and Wave solder machines

    Systech Illinois are the only company that has the option of RACE™ cell technology. What is the RACE™ cell? It is a patented dual cell technology which employs a second fuel cell to protect the first cell from being exposed to high concentrations of O2. What does it do?  ...


    By Systech Instruments Ltd

  • Monitoring of Hydrogen Sulfide in Industrial Processes

    Hydrogen sulfide, H2S, is a very poisonous, corrosive, and flammable gas. As such, it needs to be carefully monitored and controlled in industrial processes where it is generated or used. At relatively low concentrations, it has an odour of rotten eggs which effectively works as a warning, but at higher concentrations where it becomes acutely toxic and even lethal, it can no longer be smelled ...


    By Opsis AB

  • In-Situ® Optical RDO® Methods for Dissolved Oxygen Measurements Outperform Traditional Methods

    ABSTRACT Three methods are generally used to measure dissolved oxygen (DO) in surface waters: Winkler titration, membrane-covered electrochemical sensors (polarographic or galvanic cell), and luminescent-based sensors. Optical (luminescent) technology for measuring DO levels in water has quickly become a well-accepted method due to many advantages over membrane-based sensors, and its close ...


    By In-Situ, Inc.

  • 3-in-1 Flame-Ox High BTU Thermal Oxidizer - Case Study

    Environmental Issues Controlling the off-gas from a remediation project, where high concentrations of petroleum hydrocarbons are present, can be a difficult if not dangerous process when utilizing internal combustion engines and conventional oxidation technology. In more recent years, the use of high vacuum pumps to accomplish both liquid and gas phase extraction — sometimes ...

  • Operating Principle of an Oxygen Monitor

    The oxygen concentration in the flue gas of a combustion process such as that of a power plant or a waste incinerator gives a good indication of the efficiency of the combustion process. The parameter is therefore of great interest to optimize fuel economy, but also to control and reduce emissions of air pollutants. An ideal combustion process only results in CO2 and water, but ...


    By Opsis AB

  • Boiler Dissolved Oxygen Control

    DISSOLVED OXYGEN CHEMISTRY Dissolved Oxygen (DO) is a measure of the amount of oxygen, usually thought of as a gas, that is dissolved in a liquid such as water. Oxygen is essential to life and is also the most common element found taking part in corrosion reactions. DO can be thought of as the fuel needed for the corrosion process to proceed. It is the corrosion reactions that necessitate ...


    By IC Controls Ltd.

  • Measuring Short-Term BOD

    Measurement of oxygen uptake rates in activated sludge processes is essential to their satisfactory operation. Traditionally, oxygen uptake rates (OUR) have been determined by using a dissolved oxygen probe to measure the change in dissolved oxygen in a BOD bottle. While this method is rapid, it provides only a snapshot, at a single point in time, of the oxygen uptake rate reaction in a treatment ...


    By Challenge Technology

  • What is Chemical Oxygen Demand (COD)?

    Chemical Oxygen Demand (COD) analysis is a measurement of the oxygen-depletion capacity of a water sample contaminated with organic waste matter. Specifically, it measures the equivalent amount of oxygen required to chemically oxidize organic compounds in water. Why Measure COD? COD is used as a general indicator of water quality and is an integral part of all water quality ...


    By MANTECH Inc.

  • Continuous measurement of Process oxygen for Claus sulfur recovery unit (sru) start-ups and shut-downs case study

    During start-up and shut-down, any time a sulfur recovery unit (SRU) transitions from ambient temperature through fuel gas warm up to the introduction of acid gas, measurement of 02 stoichiometry is critical. Historically, operators have manually taken samples using a portable electrochemical type Os analyzer. While giving more or less satisfactory results, the requirement for more stringent ...

  • Oxygen Transfer in a Biological Aerated Filter

    The City of San Diego (City) operates the Point Loma Wastewater Treatment Plant (PLWTP) which can normally treat up to 240 million gallons per day (MGD) of chemically enhanced primary treated (CEPT) effluent for ocean disposal. The City wanted to understand the performance capabilities of Biological Aerated Filters (BAFs) in treating CEPT effluent to secondary standards. To this end, the City ...

  • What are the differences between Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD)?

    Ask the expert: What are the differences between Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD)? Answer: Both COD and BOD test methods aim to give an indication of the amount of pollution in a water sample. COD is the amount of oxygen required to chemically breakdown the pollutants whereas BOD is the amount of oxygen ...


    By Camlab Limited

  • A fully automated system for measurements of photosynthetic oxygen exchange under immersed conditions: an example of its use in Laminaria digitata (Heterokontophyta: Phaeophyceae)

    Abstract A new, fully-automated, closed-chamber system was developed for measuring photosynthetic activity in aquatic plants, algae, or corals during immersion. The performance of this system, which monitors oxygen exchange, was evaluated both in the laboratory and in situ under natural conditions using the seaweed Laminaria dtgitata. Intact, large individuals were placed inside the chamber ...


    By In-Situ, Inc.

  • Water quality measurement extreme

    Background The characteristics of the Rio Tinto in the south-west of Spain, near Sevilla, are his ruby colour and the extremely sour pH-value between 0 and 2 pH-units. The river carries a mixture between poisonous heavy metals like copper, nickel, arsenic, iron and cadmium, dissolved in high-percent sulphuric acid. It’s not proved where these unusual conditions come from. As per current ...


    By OTT HydroMet

  • Performance-Based Measurement Systems

    Many of the Environmental Protection Agency's (EPA's) methods used to monitor air, water and soil for environmental contaminants prescribe step-by-step details on how the chemical analysis must be conducted and prohibit any deviations or variations. The EPA has recognized that monitoring equipment and technology have improved tremendously over the last few years; that environmental media do not ...


    By WSP | Parsons Brinckerhoff

  • Does my laboratory need an oxygen monitor?

    You may be in need of an oxygen monitor if you work in the hospitality industry, especially in breweries and in food packaging. However if you work in a laboratory, oxygen monitoring is essential. Inert Gases and ...


    By Analox Sensor Technology

  • Analox Case Study: Monitoring Oxygen at Cranfield Airfield

    Introduction For personnel safety, monitoring of oxygen levels was required as part of an experimental field campaign based at Cranfield airfield. This experiment was undertaken by researchers in the atmospheric physics group at Imperial College London. ...


    By Analox Sensor Technology

  • Stability measurement of Biosolids Compost by Aerobic Respirometry

    Oxygen uptake of biosolids compost was measured during both laboratory and full-scale studies. Aerobic respirometry of solid samples of compost provided a precise measure of microbial activity. There was a noticeable decreasing trend in oxygen consumption over 25 days of composting, thereby indicating increasing stability. Moisture content also was found to affect the compost stability. During ...


    By Challenge Technology

  • Energy Optimisation by Determination of Critical Oxygen Point in WWTP Operations

    The control of dissolved oxygen levels in Waste Water Treatment plants has been the subject of considerable technological improvement over the past 2 decades. Typically the energy required for aeration purposes in aerobic activated sludge plants is in the region of 35% to 65% of the total energy costs for the facility. On a global basis energy conservation is taking on greater and greater ...

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