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Whether you are looking for an accurate digital meter in the lab or in the field, we have the right instrument to meet your specific requirements. Our solutions include measurements for:
Complete your electrochemistry system with our sensors, calibration solutions, software and accessories.
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Benchtop pH Meter | Portable pH Meter | Analytical Sensors |
User-friendly and intuitive single and multi-channel instruments for the highest precision and solid compliance. | Single and dual channel portable pH meters that are robust and ergonomic. Perfectly suited for mobile pH applications in the laboratory, at-line and in the field. | High quality sensors covering a range of applications and measurement parameters including pH, ORP, conductivity, ion concentration and dissolved oxygen. |
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pH Standard Solutions | pH Automation & Software | pH Accessories |
Calibration, verification and maintenance solutions to ensure high measurement precision and uptime. | Software and Automation solutions for higher productivity, more reliable results and solid compliance. | Peripherals to support your workflow - ergonomic electrode holder, magnetic stirrer, parameter expansion modules, printer, barcode reader and more. |
User-friendly and intuitive single and multi-channel instruments for the highest precision and solid compliance.
Single and dual channel portable pH meters that are robust and ergonomic. Perfectly suited for mobile pH applications in the laboratory, at-line and in the field.
High quality sensors covering a range of applications and measurement parameters including pH, ORP, conductivity, ion concentration and dissolved oxygen.
Calibration, verification and maintenance solutions to ensure high measurement precision and uptime.
Software and Automation solutions for higher productivity, more reliable results and solid compliance.
Peripherals to support your workflow - ergonomic electrode holder, magnetic stirrer, parameter expansion modules, printer, barcode reader and more.
The METTLER TOLEDO pH Competence and Support Center (pH CSC) comprises a team of experts in direct electrochemical analysis. Due to the team's close contact with customers, technical support, product management and product development, quick advice and effective solutions can be provided, making this service rather unique in the world of pH analysis.
The offered technical and applicative support encompasses the following measuring parameters and the related METTLER TOLEDO pH Lab equipment:
We support and service your measurement equipment through its entire life-cycle, from installation to preventive maintenance and calibration to equipment repair.
Select your question:
A pH meter is an scientific device used to measure the activity of hydrogen ions in a solution, which is then expressed as pH. Measuring pH is a widely applied technique in various fields and ranges from laboratory measurements to process applications. With our pH measuring devices, one can also measure other important parameters like Conductivity, Ion Concentration, ORP, and Dissolved Oxygen. This page showcases the types of laboratory pH meters and their applications.
There are mainly two systems to measure pH: pH indicators and pH meters. However, not all of them provide the same accuracy and quality level. A comparison between two widely used methods is shown below:
pH indicators
pH meters
A pH meter measures the potential differences between a reference electrode (like Calomel or Ag/AgCl) and a pH electrode (glass electrode). This difference between the two electrodes is related to the concentration of H+ ions in the solution. Therefore, the difference in potential corresponds to the acidity / pH of the solution.
The tools necessary for pH measurements are relatively uncomplicated and provide reliable measurements when used correctly. A typical pH meter requires two main tools:
1. Digital pH meter
2. Sensors: A reference and a pH electrode for completing the circuit. Nowadays for convenience, the above two electrodes are combined into one electrode and are called combined pH electrodes
Other tools required are:
3. Calibration solutions: Before measuring the pH of a sample, two or more reference solutions of known pH values must be used for the calibration of the pH electrode
4. Sample: The solution for which pH is to be measured
They are used for a variety of applications across many sectors such as:
Agriculture: Measuring the pH of soil, fertilizers, pH of fruits and vegetables, grains, etc.
Food and Beverages: Quality control laboratories of various food and beverages like sauce, jams jellies, juices, milk, yogurt, cheese and other dairy products, fish, meat, soft-drinks, alcoholic beverages.
Water Analysis: Testing the quality of pure water, potable water from municipal water supplies, swimming pools, effluents, environmental remediation, etc.
Healthcare and Pharmaceutical: Testing of drugs, liquid syrups, and other clinical applications such as blood chemistry, etc.
Paints and Dyestuff Industry
pH becomes an important parameter in the case of paints to impart the desired properties to them. Eg: the pH of emulsion paints is maintained between 8.5-9.0 to avoid corrosion.
If the pH of acrylic paints drops below 7.5, the paint gains a cheesy consistency and is ruined.
Cosmetics, Flavors and Fragrances: During manufacturing, pH is measured to monitor a product's consistency and quality.
Electroplating Industry: pH is an important criteria and decides the quality and consistency of the plating. In addition, the pH measurement of pure water is important to ensure the right pH of the electrolytic bath.
It largely depends upon the type of application (field or laboratory). Based on the application and its needs, the meters are classified as:
1. Benchtop meters: They are pH meters designed specifically for laboratory use and meant for pH measurements in stationary applications for QC lab.
2. Portable meters: These are small hand held, light weight pH meters, which can be carried to different locations like at-line measurements during manufacturing processes or outdoor / field applications.
Yes, we have pH meters that are specially designed to meet the most stringent compliance needs. Our LabX® PC software offers all that is needed for perfect compliance support.
Yes, we offer professional installation, qualification and calibration services. These services will guarantee accurate and precise measurements making the user worry-free when it comes to possible compliance issues during quality audits.
Yes, calibration helps in determining that the instrument is functioning correctly. Calibration is necessary to adjust the slope and offset of an electrode to their true values for the measuring system in question. With routine calibration of the instrument, one can confidently do the measurements.
pH meters are calibrated with appropriate laboratory calibration solutions of known pH. The frequency of calibration depends upon the frequency of the usage of the meter and applications. For details please refer to the following calibration video.
This depends on the application. Dedicated single channel meters are used to measure one parameter at a given instance like:
a. pH
b. ORP
c. Ion concentration
d. Conductivity
e. Dissolved oxygen
Whereas, multi-parameter instruments allow the measurement of more than one parameter at the same time. In addition, the instruments are available in different combinations. With these meters, it is possible to simultaneously measure for more than one parameter in the same sample.
A conductivity meter measures the conductivity or amount of electrical conductance of a solution. Conductivity is an important parameter and has several applications in water analysis, food and beverage, electronics and pharmaceutical industries.
Yes, we have instruments that support 13 local languages. Selecting the right settings from the menu is intuitive because the instrument speaks your language. Currently, our instrument supports the English, German, French, Spanish, Portuguese, Italian, Russian, Chinese, Japanese, Korean, Polish, Thai and Turkish languages.
Our benchtop meters are built to last by withstanding spills on the housing and connections. This provides protection while allowing for easy cleaning with a damp cloth. Similarly, our portable meters are completely waterproof and made to withstand harsh and demanding field applications.
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Indeed, we have meters, which support the printing of results and other information to compact printers such as the RS-P25 or USB-P25.
Yes, and this is a good option for increasing the productivity and efficiency in your lab. For further details, please click here.
The METTLER TOLEDO pH Competence and Support Center (pH CSC) comprises of a team of experts in direct electrochemical analysis. Due to the team's close contact with customers, technical support, product management and product development, quick advice and effective solutions can be provided, making this service rather unique in the world of pH analysis.
The offered technical and applicative support encompasses the following measuring parameters and the related METTLER TOLEDO pH Lab equipment:
The Following accessories can be used along with the pH meter to improve its function:
