All Categories
History
This section provides an overview for digital ph meters as well as their applications and principles. Also, please take a look at the list of 23 digital ph meter manufacturers and their company rankings. Here are the top-ranked digital ph meter companies as of January, 2025: 1.Devar Inc., 2.Mettler-Toledo, 3.Apera Instruments, LLC.
Table of Contents
Categories Related to Digital pH Meters
A digital pH meter is an instrument used to measure the pH of a solution.
It is expressed as a number between 0 and 14, with a value of 7 indicating neutrality, a value less than 7 indicating acidity, and a value greater than 7 indicating alkalinity.
A digital pH meter can be used to read the hydrogen ion concentration index of a solution as a digital value. pH is called "pH" or "pH (pHH)," but JIS Z8802:2011 states that it should be read as "pH or pHH.
Digital pH meters are used for environmental measurement and chemical analysis. In environmental measurements, digital pH meters are used for water quality control of drinking water and wastewater, and in chemical analysis, digital pH meters are used for quality control in laboratories and on industrial production lines.
In chemical analysis, pH is one of the indicators that affect sample pretreatment and analysis conditions. pH also affects the progress of chemical reactions, making it an important control item at manufacturing sites.
The measurement method most commonly used in digital pH meters is the glass electrode method. The glass electrode method uses two electrodes (a glass electrode and a reference electrode). When a liquid with a different pH is present in the two areas separated by the glass films of the electrodes, an electromotive force corresponding to the difference is generated, and the pH is calculated by measuring the potentials of the glass and reference electrodes in the main unit.
Note that the pH meter must be calibrated before use. pH standard solutions are generally calibrated with pH 7 as the zero point and pH 4 and pH 9 as the three-point calibration, but the pH standard solution used for calibration may be changed depending on the pH of the sample. It should also be noted that the slope of the calibration curve is affected by temperature.
To measure pH accurately, the temperature of the pH standard solution and the sample must be matched as much as possible, the electrode must be properly maintained, and the electrode's drop must be immersed in the sample. pH measurement itself is a simple task, but it is important to keep in mind the key points during measurement and to establish a maintenance method. It is important to follow the procedure for the measurement and maintenance of the electrode.
Other pH measurement methods besides the glass electrode method include the use of indicator such as litmus paper, hydrogen electrode, quinhydrone electrode, and antimony electrode methods.
Calibrating a pH meter means correctly adjusting the zero and span points (sensitivity) of the pH meter using a pH standard solution. Since there are specific operations depending on the digital pH meter used, the instructions provided with the meter should be given priority when performing the actual calibration.
There are three types of calibration: one-point calibration using one type of pH standard solution, two-point calibration using two types, and three-point calibration using three types, but two-point calibration is often used to calibrate pH meters. One-point calibration is a simplified calibration. For more rigorous calibration, three-point calibration is used.
The actual value of "electromotive force per pH" at a glass electrode is affected by contamination of the glass film and "alkaline error" and "acid error" (errors in strong alkaline and strong acid conditions, respectively). Therefore, the actual value is generally lower than the theoretical value (59.16mV at 25°C). The "pH7 EMF" also deviates from the theoretical value (0mV).
By performing calibration prior to measurement and periodically, highly accurate pH measurement can be achieved.
The types, quality, and composition of pH standard solutions are as follows.
Oxalate pH Standard Solution
0.05mol/kg potassium trihydrogen dioxalate solution, pH 1.68 at 25°C
Phthalate pH Standard Solution
0.05mol/kg potassium hydrogen phthalate in aqueous solution, pH 4.01 at 25°C
Borate pH Standard Solution
0.01mol/kg sodium tetraborate aqueous solution, pH 9.18 at 25°C
Carbonate pH sStandard Solution
0.025mol/kg sodium bicarbonate and 0.025mol/kg sodium carbonate solution at pH 10.02
Neutral Phosphate Standard Solution
0.025mol/kg potassium hydrogen phosphate, 0.025mol/kg disodium hydrogen phosphate solution, pH 6.86 at 25°C
*Including some distributors, etc.
Sort by Features
Sort by Area
Sper Scientific Ltd. was founded in 1982 and is based in Scottsdale, Arizona, USA, as a manufacturer of environmental measurement instruments. The product portfolio of the company comprises Bluetooth anemometers, weather ball barometers, multi IAQ monitors, Bluetooth hygrometers, and portable handheld vibration meters. The products provide real-time weather data, monitor indoor air quality, regulate humidity in HVAC systems, and diagnose vibration-related issues in machinery. The company serves various industries, such as food and beverage, building inspection, industrial hygiene, oil and gas, and laboratories.
Apera Instruments, LLC, founded in 1991 and headquartered in Columbus, Ohio, USA, is a manufacturer of electrochemical sensors and instruments. The company specializes in making meters and sensors for a wide range of parameters such as pH, conductivity, TDS (Total Dissolved Solids), salinity, ORP (Oxidation-Reduction potential), DO (Dissolved Oxygen), turbidity, and ISE (Ion-Selective electrodes). It boasts ISO 9001 and CE certifications for optimal quality and precision in its products. Its offerings provide accurate measurements, making them indispensable tools for professionals in various industries, including water quality analysis, environmental monitoring, laboratory research, and food and beverage production.
Milwaukee Instruments, Inc. is a manufacturer of precision instrumentation and equipment for water analysis that was founded in 1989 and is headquartered in Rocky Mount, North Carolina, USA. The company's products encompass a range of analytical instruments including pH meters, EC meters, and refractometers. These instruments find applications in various sectors like agriculture, environmental monitoring, and aquaculture. Milwaukee Instruments also offers calibration, maintenance, and technical support services to ensure accurate measurements for its customers.
Jenco Instruments, founded in 1973 in San Diego, California, USA is a manufacturer of water quality meters and digital portable pH meters. Its product range includes stationary meters designed for measuring one or multiple parameters, which can be paired with specific electrodes tailored for various functions, including ion-selective electrodes (ISE) for ion measurement. These instruments find applications in environmental research for monitoring water quality as well as in fields such as life sciences, medical research, pharmaceuticals, and laboratory work. The company offers the EC 115B Bluetooth device, designed for measuring visibility and temperature, which conveniently displays calibration data and history.
Devar Inc, established in 1961 and headquartered in Bridgeport, Connecticut, USA, is a manufacturer of instruments for monitoring, control, and data acquisition. The company specializes in producing a comprehensive range of products, including temperature sensors, pressure transmitters, flow meters, and level sensors. It holds ISO 9001 certification for optimal quality standards in its manufacturing processes, and the products offer precise and stable measurements, resulting in improved process efficiency and safety. It primarily serves the water and wastewater industries, providing essential instrumentation solutions for monitoring and controlling various parameters critical to water treatment and management.
Omegasonics, established in 1996 and based in Simi Valley, California, USA, is a manufacturer of industrial and commercial ultrasonic cleaners. The company offers various ultrasonic cleaning equipment, including tabletop ultrasonic cleaners, benchtop ultrasonic cleaners, and industrial ultrasonic cleaning tanks. It holds ISO 9001:2015 certification for producing advanced cleaning solutions, and its ultrasonic cleaners provide numerous benefits, such as efficient and thorough cleaning, reduced labor costs, sustainable cleaning solutions, and the ability to clean complex and delicate parts effectively. It serves numerous industries, including automotive, aerospace, electronics, medical, and firearms manufacturing, where precision cleaning and contamination control are essential.
Hanna Instruments, Inc., established in 1978 and based in Woonsocket, RI, USA, is a manufacturer and supplier of scientific products. The company products are utilized in the examination of several sectors, including waste water, hydroponics, food and beverage, and laboratories. With the release of the pHep (pH Electronic Paper) pH tester, Hanna completely changed the field of pH testing. The company production facilities have ISO 9001:2000 certification, and all products adhere to international standards.
Triplett Test Equipment & Tools was established in 1901 and is headquartered in Bluffton, Ohio. The company is a manufacturer and distributor of electrical test equipment and tools. Triplett's product range includes digital multimeters, oscilloscopes, power quality analyzers, and a multiple other test equipment. The company's products are used by a wide range of customers, including electricians, engineers, and technicians. The company's products are also backed by a world-class warranty and are supported by a team of experienced engineers and technicians.
Line Seiki, a manufacturer of counters and test measuring instruments based in Tokyo, Japan, was founded in 1949. The company offers products such as limit switches, rotary encoders, tachometers, electronic counters, and measuring devices. The firm runs a solutions division where it provides length, counting, control, and IOT measures. The goods are included in pumps, billiard tables, roller shutters, copy machines, and vending machines. The business runs a design, development, and manufacturing-integrated production process for the products.
Atago Co., Ltd., established in 1940 and headquartered in Tokyo, Japan, is a manufacturer that specializes in the development and manufacturing of refractometers. The company’s product line includes pocket refractometer, digital hand held pocket refractometer, and Starr X Series. It also offers PAL-2, PEN Urine S, PAL-UREA, and PAL-1 BLT. Its refractometers are designed to be easy to use, even for individuals who are not familiar with refractometers. The company has achieved has achieved the Hazard Analysis and Critical Control Point certification. Its refractometers can be used in various industries, including food and beverage, medical, cosmetics, and chemicals.
Shinwa Rules Co. was founded in Niigata, Japan, in 1971. Shinwa Rules Co. develops a variety of measuring products including calipers, thermometers, hygrometers, laser optical apparatuses, and sheet heating elements. Above these, Shinwa develops metallic rulers and squares. Additionally, Shinwa operates as an OEM supplier for special calibrations and machine tools, special surface fabrication, and etching on metallic parts.
HORIBA RADIO LABORATORY was established in Japan in 1945 and has spent the last three-quarters of a century growing as an R&D company and engaged in international operations. HORIBA Scientific offers 200 years of experience developing high-performance scientific instruments and analytical solutions. The HORIBA Group of worldwide companies provides an extensive array of instruments and systems for applications ranging from automotive R&D, process and environmental monitoring, in-vitro medical diagnostics, semiconductor manufacturing, and metrology to a broad range of scientific R&D and QC measurements. Operating in Asia, Europe, and North and South America, HORIBA scientific develops solutions that go beyond just products.
Turtle Tough Pty Ltd., founded in 1994 and headquartered in Victoria, Queensland, Australia, is a manufacturer of industrial liquid sensors. The company specializes in producing a broad range of liquid measurement sensors, including pH sensors, ORP (Oxidation-Reduction Potential) sensors, conductivity sensors, and turbidity sensors, used for robust quality and precision. It maintains ISO 9001 certification for producing advanced-quality, stable sensors that offer numerous benefits, such as extended lifespan, resistance to harsh environments, and minimal maintenance requirements, ensuring cost-effective and efficient operations. Its sensors find applications across various industries, including mining, water treatment, chemical processing, and environmental monitoring.
Mettler Toledo was incorporated in 1945 in Toledo, Ohio, and is today headquartered in Greifensee, Switzerland. Mettler Toledo is a manufacturer of various analytical instruments for use in laboratories, industrial and manufacturing, and food retailing applications to customers globally. Mettler Toledo offers many products across product lines for uses such as product inspection, process analytics, jewelry scales, moisture analyzers, and software for laboratory weighing. Mettler Toledo also offers numerous accessories such as density kits, hands-free accessories, weighing tables, and weight accessories.
TOP Cloud-agri, founded in 2008 and based in Hangzhou, Zhejiang Province of China, is a manufacturer and designer of agriculture testing instruments. The company produces products such as weather monitor instruments, food safety instruments, flour and oil testing instruments, and general lab equipment. All the testing instruments made by the company are used in seed breeding, cleaning, storage, and water quality detection. The company holds 14 national invention patents, 20 appearance patents, 57 utility model patents, and 70 software copyrights with ISO 9 0 0 1, ISO 1 4 0 0 1, and ISO 4 5 0 0 1 certificates.
Royal Brinkman, established in 1885 and based in Brinkman, Canada, is a manufacturer of the products used in horticultural practices. The company supplies products, including monopotassium phosphate RB, Rosa Flor liqs, Georgia spraying trolleys, and Brinkman grafting clips. The products are used in crop protection, disinfection, crop care, crop rotation, and technical projects. The company has partners like Moleaer in Mexico who deliver and support Moleaer's nanobubble generators and products to high-tech greenhouse growers in Mexico.
Panomex Inc., an established manufacturing company based in India with more than 15 years of experience, specializes in a wide range of industrial and scientific instruments. Their product portfolio includes digital moisture meters, gas detectors, ultrasonic thickness gauges, and more. The company also continues to deliver advanced solutions to a wide range industries, and owns manufacturing unit equipping with research and development lab, with an engineering team with sound experience in meteorology. They offer products to both Indian market and export to overseas mainly in Asia, Africa and Middle East countries.
Machine Control System., founded in India, is a supplier of electronic digital meters for control panels. The company's product portfolio includes a variety of digital meters such as voltage meters, current meters, frequency meters, and more, designed for easy integration into control panels and energy meters for accurate measurement of power consumption, helping industries monitor and optimize energy usage. It also provides technical support and assistance to ensure the successful integration and operation of our electronic digital meters.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Devar Inc. |
11.3%
|
| 2 | Apera Instruments, LLC |
8.2%
|
| 3 | Mettler-Toledo |
8.2%
|
| 4 | Turtle Tough Pty Ltd. |
7.2%
|
| 5 | Omegasonics |
6.2%
|
| 6 | Panomex Inc. |
6.2%
|
| 7 | Triplett Test Equipment & Tools. |
6.2%
|
| 8 | Milwaukee Instruments, Inc. |
5.2%
|
| 9 | Hanna Instruments, Inc. |
5.2%
|
| 10 | Jenco Instruments |
5.2%
|
Derivation Method
The ranking is calculated based on the click share within the digital ph meter page as of January 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
8 | 38.1% |
|
Japan
|
4 | 19.0% |
|
India
|
3 | 14.3% |
China
|
3 | 14.3% |
|
Australia
|
1 | 4.8% |
|
Germany
|
1 | 4.8% |
Republic of Korea
|
1 | 4.8% |
156 products found - Page 4
156 products - Page 4
Metrohm
30+ people viewing
Last viewed: 3 hours ago
■Features Two-channel pH/conductivity measuring device for measuring pH/mV/conductivity/TDS/salinity and temperature. This battery-powered measurin...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 1 day ago
Features ■4-point calibration possible with measurement accuracy of ±0.05pH This is a highly reliable small pH tester. ■ Easy data storage and tra...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 1 day ago
■pH tester for cheese, dairy products, and semi-solid foods Introducing a small tester suitable for checking pH during the cheese manufacturing pro...
Hanna Instruments JAPAN
30+ people viewing
■Measure pH and EC at the same time HI 991300D and HI 991301D are convenient waterproof and portable types that can measure pH/EC/TDS/℃ with a sing...
Metrohm
20+ people viewing
■Features In addition to the ability to measure pH, power supply voltage, and temperature, the 780pH Meter offers automatic stirring control, multi...
Hanna Instruments JAPAN
20+ people viewing
Last viewed: 1 day ago
■Beer pH tester capable of up to 4-point calibration Hanna's latest pH tester HALO2 series breaks the conventional wisdom of pH testers. Equipped w...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 1 day ago
■pH tester for wine Introducing a small tester suitable for checking the pH of wine and grape juice. pH electrodes with a movable PTFE sleeve minim...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 1 day ago
■Measure pH and EC simultaneously with simple operations HI 9811-51 and HI 9812-51 are portable types that can measure pH/EC/TDS/℃ with a single el...
Apera Instruments Co., Ltd.
80+ people viewing
■Product structure characteristics ・Since the pH connector is BNC type, APERA/LabSen® glass electrodes for special applications can also be connec...
Metrohm
40+ people viewing
Last viewed: 1 day ago
■Features The combined 781 pH/ion meter can measure pH, ions, voltage, and temperature, as well as automatic stirring control, multi-point calibrat...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 2 hours ago
■Laboratory pH tester comparable to desktop type Hanna's latest pH tester HALO2 series breaks the conventional wisdom of pH testers. Equipped with ...
Hanna Instruments JAPAN
20+ people viewing
Last viewed: 1 day ago
■pH tester for milk Introducing a small tester suitable for checking pH during the milk manufacturing process. The conical pH electrode can be used...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 20 hours ago
■pH and EC meters that are popular in the agricultural field such as hydroponic cultivation HI 9813-51 and HI 9813-61 are portable types that can m...
Apera Instruments Co., Ltd.
140+ people viewing
■Product structure characteristics ・Because it is a BNC connector type, APERA/LabSen® glass electrodes for special applications can also be connec...
Metrohm
30+ people viewing
Last viewed: 12 hours ago
■Features Module for pH/ion measurements as an extension of Titrando or as a "standalone" in combination with the 900 Touch Control. The pH module ...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 1 day ago
■Laboratory pH tester capable of up to 4-point calibration Hanna's latest pH tester HALO2 series breaks the conventional wisdom of pH testers. Equi...
Hanna Instruments JAPAN
20+ people viewing
■Popular model that can measure pH and EC (conductivity) with one device It is a convenient and versatile product as it can measure multiple items ...
Hanna Instruments JAPAN
20+ people viewing
Last viewed: 1 day ago
■pH and EC meter for agriculture GroLine series for agriculture and hydroponic cultivation. Among them, HI 9814D is a pH/EC/TDS/℃ meter for soil su...
Apera Instruments Co., Ltd.
140+ people viewing
Last viewed: 11 hours ago
■Product overview Accurate pH measurements start with the correct pH electrode, so it is difficult to use the same electrode for every pH measureme...
Metrohm
20+ people viewing
■Features The high-end pH/ion meter is based on the 867 pH module, which includes the 900 Touch Control, 854 iConnect and the intelligent pH glass ...
Hanna Instruments JAPAN
20+ people viewing
■Advanced desktop pH/ORP meter The HI 6221 is a state-of-the-art desktop measuring instrument with a large touch screen display that consists of a ...
Hanna Instruments JAPAN
30+ people viewing
■Popular model that can measure pH and EC (conductivity) with one device GroLine series for agriculture and hydroponic cultivation. Among them, HI ...
Apera Instruments Co., Ltd.
90+ people viewing
Last viewed: 1 day ago
■Product structure characteristics ・Because it is a BNC connector type, APERA/LabSen® glass electrodes for special applications can also be connec...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 3 hours ago
■Best class pH & EC meter A pH&EC meter boasting the highest accuracy and reaction speed in Hanna history. Large color LCD screen, simultaneous mea...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 1 day ago
■ORP tester standard model (consumables set) A pocket-sized tester that allows you to easily check ORP (oxidation-reduction potential). The HI 9812...
Apera Instruments Co., Ltd.
170+ people viewing
Last viewed: 21 hours ago
■External design that saves space, maintenance costs, and costs* ・The BNC connector type has flexible connectivity, so electrodes can be used for ...
Hanna Instruments JAPAN
30+ people viewing
Last viewed: 1 day ago
■Best class pH/ORP/ISE meter A pH meter boasting the highest accuracy and reaction speed in Hanna history. Large color LCD screen, simultaneous mea...
Hanna Instruments JAPAN
40+ people viewing
Last viewed: 5 hours ago
■Summary A standard type portable pH meter that can also measure temperature. ORP (oxidation-reduction potential) can also be measured by connectin...
Apera Instruments Co., Ltd.
110+ people viewing
Last viewed: 21 hours ago
■Easy-to-use external design and product packaging ・Adopts TFT color liquid crystal, which is the mainstream liquid crystal panel, for comfortable...
Metrohm
20+ people viewing
■Summary The process online analyzer 202X series is a compact device that can perform measurements such as titration, pH, and absorbance using a si...
