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Dissolved CO2 instruments are analytical devices that measure the amount of carbon dioxide (CO2) dissolved in a liquid sample such as water. They typically include a submerged probe that is covered by a thin organic membrane. When the probe is submerged in the liquid sample, carbon dioxide diffuses through the membrane at a rate proportional to the partial pressure. Increasing the partial pressure increases the diffusion amount. The liquid sample is considered to be saturated when the molecular activity of the carbon dioxide equals that of the liquid. Air contains only 0.035 % carbon dioxide by volume; however, CO2 is nearly 30 times as soluble in water as oxygen. Carbon dioxide moves across the air-water interface according to the same physical process that affect the dissolving of oxygen. Both temperature and pressure affect the diffusion rate measured by dissolved CO2 instruments. Accuracy and diffusion range are typically measured in parts per thousand or parts per million.

Dissolved CO2 instruments vary in terms of user interface, features, and output options. Some devices provide analog or digital displays. Others include devices such as cathode-ray tubes (CRTs), liquid crystal displays (LCDs), or flat panel displays. User controls may consist of knobs or potentiometers mounted on a simple front panel. Digital front panels are programmable and work with a keypad. Some devices are battery-powered, self-calibrating, or equipped with self-test diagnostics. Others are triggered by events or include signal processing or filtering. Output options include analog voltage, analog current, analog frequency, and switch or alarm relays. Analog voltage outputs are a simple (usually linear) function of the measurement. Analog currents use feedback to provide an appropriate current regardless of variables such as noise and impedance. Analog frequencies use continuous physical variables such as voltage amplitude or frequency variations to transmit information.


Products & Services Related to Dissolved CO2 Instruments
Conductivity Meters, Dissolved Solids Meters and Resistivity Meters
Conductivity meters, dissolved solids meters, and resistivity meters are analytical instruments that measure the conductivity, dissolved solids, and/or resistivity of a liquid sample.
Dissolved Oxygen Meters
Dissolved oxygen meters are analytical instruments that are used to measure the amount of oxygen dissolved in a liquid sample.
Ion Specific Electrode Meters
Ion specific electrode meters are millivolt meters that interface with ion selective electrodes (ISEs). These meters take the potential generated by the electrode and convert it into units of concentration.
Oil In Water Monitors
Oil in water monitors are used to detect the presence of hydrocarbons in water.
pH and Oxidation Reduction Potential (ORP) Instruments
pH and oxidation reduction potential (ORP) instruments measure or monitor pH (relative concentration of hydrogen ions [H+] in a solution) as well as ORP.
Turbidity Instruments
Turbidity instruments measure the average volume of light scattering over a defined angular range. Both particle size and concentration of suspended solids as well as dissolved solids can affect the reading.
Water Quality Testing Instruments
Water quality testing instruments are used to test water for chemical and biological agents, and to measure variables such as clarity and rate of movement.

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Engineering Web: Dissolved CO2 Instruments
Pages: 1 - 5 of 10520
2004 Ocean Research Conference Abstract Book Co-sponsored by the American ...
In order to test the hypothesis of a "continental shelf pump" of CO2 in the North Sea,. dissolved inorganic Carbon (DIC), partial pressure of CO2 (pCO2) and related parameters,. The spectral ...
THE VOLUNTARY OBSERVING SHIPS SCHEME
CO2 instruments will be deployed worldwide by the non-profit International SeaKeepers Society to analyze. CO2 absorption by the oceans as a contribution to the research on the role of CO2 in global ...
IndustrialElectronicsRepair.com | Industrial Electronics Repair | H2 Analyzer | ...
CO2 Test Meters. Carbon Dioxide (CO2) measurement in buildings w/mobile PCs. View demo.. www.wolfsense.com/. Vaisala CO2 indicators. Wide range of CO2 instruments for HVAC professionals.. www.vaisala.com ...
ISA 2008 Prod Codes
Flow Indicators And Gauges. 153. Dissolved CO2 Instruments. 508. Flow Meters. 59. Dissolved Oxygen Meters. 1969. Flow Orifices and Flow Restrictors. 293. Dissolved Oxygen Sensors. 999101. Flow Sensors ...
See ISA Information
ORNL/CDIAC-135 NDP-079 CARBON DIOXIDE, HYDROGRAPHIC, AND CHEMICAL DATA OBTAINED ...
A brief look at the. references will confirm the collective contributions of the measurement group to the accurate. determination of dissolved CO2 in seawater before and during the WOCE CO2 Survey. 10 ...
See Oak Ridge National Laboratory Information

Part Numbers for Dissolved CO2 Instruments

Part # Distributor Manufacturer Product Category Description
TES-1370   TES Electrical Electronic Corp. Dissolved CO2 Instruments 3 LCD display for CO2/%RH/temperature, wavelength NDIR infrared CO2 sensor
LAN 9000 Beverage Monitor   O. I. Analytical Dissolved CO2 Instruments Accurate, stable, continuous monitoring of sweetened and diet beverages
1119000   Thermo Scientific - Water Analysis/Orion Products Dissolved CO2 Instruments 21 CFR Part 11 Compliant
See more product announcements for Dissolved CO2 Instruments
TES-1370 CO2 Analyzer

TES-1370 CO2 Analyzer
TES Electrical Electronic Corp.


Filter Photometers

Filter Photometers
Guided Wave Incorporated


- RedEyeTM Oxygen Sensor Patch

- RedEyeTM Oxygen Sensor Patch
Ocean Optics, Inc.


11 See more product announcements for Dissolved CO2 Instruments

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