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Home  >  pH Meters and Water Quality Products > Multiparameter Meters

Multiparameter Meters

Multiparameter Meters

Multiparameter water quality meters are key tools for electrochemistry measurements. Many environmental, laboratory, and research scientists rely on these water quality meters to take accurate and efficient measurements of many different substances simultaneously. The parameters most commonly measured include: pH, conductivity, dissolved oxygen, temperature, turbidity, depth, barometric pressure, and salinity. These advanced water quality meters are often available with features not found on other equipment. Features that make them easy to use and highly functional include: large buttons, hands straps, long cables, probe storage, and rechargeable batteries. You may want to consider these features when selecting an instrument. Cole-Parmer has a large variety of water quality meters from top manufacturers such as Oakton, Orion, WTW, Hach, Horiba, YSI. Please call our Technical Experts for free assistance selecting water quality meters for your application.
What is pH?
pH is a measure of a liquid’s acidity or alkalinity as given by the relative quantity of hydrogen ions (H+) it contains. The greater the concentration of H+ ions, the more acidic the solution and the lower the pH. Conversely, the lower the H+ concentration, the more basic (or alkaline) the solution and the higher the pH. pH is formally defined as the negative log of H+ activity. This means that every pH unit expresses a tenfold change in acidic strength.

Why is pH important?
pH measurement is critical to a wide variety of industries that affect our everyday lives. Industries such as water and wastewater treatment, chemical production, agriculture, environmental monitoring, life science research, pharmaceutical production, and electronics manufacturing all rely heavily on accurate pH measurement for their processes. Consequently, pH is now the most widely tested chemical parameter in the world.

How do I measure pH?
Quick and dirty pH measurement can be achieved through litmus paper or pH indicators. These are convenient because of their low cost and ease of use, but they can only provide a rough indication of pH, which is insufficient for most applications. The more accurate method involves the use of a measurement system consisting of a pH meter, an electrode that is sensitive to H+ ions, and calibration buffer solutions. The effect that H+ ions have on the electrode can be measured and converted to a pH value by the meter.

Meter Selection
Cole-Parmer has pH meters that are suitable for almost any purpose. Select your meter based on the requirements of your application. Pocket-sized testers are great for their low cost and small size. Handheld, portable meters typically offer more features than testers and are good for laboratory and field use. Benchtop meters are ideal for stationary lab applications typically offering larger displays and more robust data management than other types of meters. ISFET (ionspecific field effect transistor) meters are a unique subset of pH meter that utilize a silicon chip sensor in lieu of a traditional pH-sensitive glass bulb electrodes. This makes them perfect for applications where the presence of glass presents an issue such as with food production.

Electrodes
Most pH measurement systems feature standard pH electrodes with glass bulbs made from pH-sensitive glass, yet there is a wide variety of configurations to handle specialized applications.

Buffers
All pH meters require calibration standards to ensure that the readings are traceable to a standard. Always choose a pH 7 buffer plus at least one other pH value close to your expected measurement range. Using solutions of known pH value allow you to adjust the system to read accurate measurements. Calibration should be performed before each reading or each set of readings.
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Representative photo only Oakton Waterproof PCD 650 Multiparameter Meter and Probes

Oakton Waterproof PCD 650 Multiparameter Meter and Probes

Product Type Multiparameter Meter,Meter style Portable,Dimensions " W 3-1/4
EW-35434-00
Call 1-888-358-4705 for availability.
$1,950.00 USD/EACH

Qty:

EW-58825-78 THERMO SCIENTIFIC ORION STAR A329PH/ISE/COND/DO PORTABLE METER

Thermo Scientific Orion Star A329pH/ISE/Cond/DO Portable Meter Kit

Product Type Multiparameter Meter,Meter style Portable,Dimensions " W 4.25
EW-58825-78
Usually ships in 6 days.
$2,749.00 USD/EACH

Qty:

Representative photo only YSI ProPlus Multiparameter Meter

YSI ProPlus Multiparameter Meter

Product Type Multiparameter Meter,Meter style Portable,Dimensions " W 3-1/4
EW-59352-00
In stock.
$1,125.00 USD/EACH

Qty:

Representative photo only Oakton Waterproof CD650 Meter Kit

Oakton Waterproof CD650 Meter Kit

Product Type Multiparameter Meter,Meter style Portable,Dimensions " W 3-1/4
EW-35433-70
Call 1-888-358-4705 for availability.
$1,599.00 USD/EACH

Qty:

EW-59331-68 Accumet XL meter

Accumet XL600 Multiparameter Benchtop Meter Only

Product Type Multiparameter Meter,Resolution pH 0.1, 0.01, 0.001,Accuracy pH +/-0.002
EW-59331-68
In stock.
$2,790.00 USD/EACH

Qty:
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Representative photo only Horiba U 53G Multiparameter Meter 33 ft 10 m cable

Horiba U-53G Multiparameter Meter, 33-ft (10-m) cable

Product Type Multiparameter Meter,Meter style Portable,Dimensions " W 4-1/2
EW-99600-32
Usually ships in 4 days.
$6,190.00 USD/EACH

Qty:

EW-59545-20 Image may vary from actual product

Hach ISFET Benchtop pH/Conductivity Meter with Probes

Product Type Multiparameter Meter,Meter style Benchtop,Dimensions " W 5
EW-59545-20
In stock.
$1,680.00 USD/EACH

Qty:

Representative photo only MYRON L EP11 PH Analog pH Conductivity Meter

MYRON L EP11/PH Analog pH/Conductivity Meter

Product Type Multiparameter Meter,Meter style Portable,Dimensions " W 4
EW-01489-62
In stock.
$629.00 USD/EACH

Qty:

Representative photo only Oakton Waterproof pH Con 10 Meter only

Oakton Waterproof pH/Con 10 Meter only

Product Type Multiparameter Meter,Meter style Portable,Resolution pH 0.1/0.01
EW-35630-03
In stock.
$545.00 USD/EACH

Qty:

EW-59331-64 Accumet XL meter

Accumet XL250 pH/ISE Benchtop Meter Only

Product Type pH/ISE Meters,Resolution pH 0.1, 0.01, 0.001,Accuracy pH +/-0.002
EW-59331-64
Call 1-888-358-4705 for availability.
$1,790.00 USD/EACH

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Representative photo only Hach ISFET Benchtop Multiparameter Meter with Probes

Hach ISFET Benchtop Multiparameter Meter with Probes

Product Type Multiparameter Meter,Meter style Benchtop,Dimensions " W 5
EW-59545-36
Usually ships in 7 days.
$2,383.00 USD/EACH

Qty:

EW-58825-94 THERMO SCIENTIFIC ORION VERSA STAR WITHPH/LOGR MODULES KIT

Thermo Scientific Orion Versa Star withpH/LogR Modules Kit

Meter style Benchtop,Temperature compensation Automatic,CE Compliance Yes
EW-58825-94
Usually ships in 6 days.
$1,943.00 USD/EACH

Qty:

EW-58825-88 THERMO SCIENTIFIC ORION VERSA STAR WITH PH/ISE MODULE KIT

Thermo Scientific Orion Versa Star with pH/ISE Module Kit

Product Type Multiparameter Meter,Meter style Benchtop,Dimensions " W 7
EW-58825-88
Usually ships in 6 days.
$2,081.00 USD/EACH

Qty:

EW-59331-66 Accumet XL meter

Accumet XL500 pH/ISE/Conductivity Benchtop Meter Only

Product Type Multiparameter Meter,Resolution pH 0.1, 0.01, 0.001,Accuracy pH +/-0.002
EW-59331-66
Call 1-888-358-4705 for availability.
$2,350.00 USD/EACH

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Representative photo only Horiba U 52 Multiparameter Meter 33 ft 10 m cable

Horiba U-52 Multiparameter Meter, 33-ft (10-m) cable

Product Type Multiparameter Meter,Meter style Portable,Dimensions " W 4-1/2
EW-99600-23
Usually ships in 4 days.
$3,870.00 USD/EACH

Qty:

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