Density and Specific Gravity Instruments (85 companies)
Density and specific gravity instruments are meters used to determine density and specific gravity.
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Dissolved CO2 Instruments (19 companies)
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.
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Dissolved Oxygen Meters (163 companies)
Dissolved oxygen meters are analytical instruments that are used to measure the amount of oxygen dissolved in a liquid sample.
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Dissolved Solids Meters (214 companies)
Conductivity meters, dissolved solids meters, and resistivity meters are analytical instruments that measure the conductivity, dissolved solids, and/or resistivity of a liquid sample.
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Instrument Calibration Services (577 companies)
Instrument calibration services test equipment and calibrate them to various standards.  
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Ion Selective Electrodes (60 companies)
Ion selective electrodes measure the potential of a specific ion in solution. This potential is measured against a stable reference electrode of constant potential.
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Ion Specific Electrode Meters (81 companies)
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.
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Oil In Water Monitors (46 companies)
Oil in water monitors are used to detect the presence of hydrocarbons in water.
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pH and Oxidation Reduction Potential (ORP) Instruments (293 companies)
pH and oxidation reduction potential (ORP) instruments measure or monitor pH (relative concentration of hydrogen ions [H+] in a solution) as well as ORP.
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pH electrodes and ORP Electrodes (161 companies)
pH electrodes and oxygen reduction potential (ORP) electrodes measure the voltage across a circuit formed by the measuring metal half-cell and the reference half-cell.
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Photometers and Colorimeters, Water Quality (106 companies)
Water quality photometers and colorimeters are ion-specific computer-interfaced probes designed to determine the concentration of a solution from its color intensity.
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Refractometers (109 companies)
Refractometers measure the critical angle of refraction through a sample. The critical angle of refraction will change with concentration.
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Total Organic Carbon (TOC) Analyzers (45 companies)
Total organic carbon (TOC) analyzers measure the amount of total organic carbon present in a liquid sample.
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Turbidity Instruments (141 companies)
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.
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Water Quality Testing Instruments (219 companies)
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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