pH Meters

Hydrogen ion concentration or pH measurement and control is an important part of any water treatment process. While it is common to use pH strips to check the acidity or alkalinity, digital pH meter for water is now being widely used across industries. This is because these are easy-to-use handy devices that may have the ability to measure multiple parameters such as ORP, TDS, chlorine concentration, and so on.

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At Cannon Water Technology, we offer a variety of pH digital testers for water treatment processes in various configurations. We stock good quality digital pH meters from reputed manufacturers such as Myron L, HM Digital, and so on. We also offer all-in-one devices that determine multiple parameters aside from pH, such as hardness, ORP, conductivity, temperature, resistivity, and so on.

Overview of Digital pH Tester for Water

Salt and hydroxide compounds (OH-) are alkaline, while phenolic compounds (H+) are acidic, some of which may be present in the water sample in varied quantities, depending on its source. This decides the hydrogen ion concentration or pH of that water sample. pH values range from 0-14. Values from 0 to 6 indicate acidic water, 8-14 indicate alkalinity, while 7 indicates a neutral pH. Ideally, water which is used for domestic use and drinking must have a neutral to alkaline pH from 7 to 8. This can be determined with the help of a digital pH water tester.

Digital pH Meters and Accessories We Offer

Along with pH meters, we offer multimeters, buffer solutions, kits, and so on. Here are some of our offerings.

  • Digital multi-parameter testers: Most brands of the pH meters can actually test multiple parameters such as electrical conductivity (EC), total dissolved solids (TDS), and temperature among many others. Most of them can test eight to nine parameters. They come with a display screen and a user-friendly menu on simple push buttons.
  • pH meter kits: We offer kits comprising syringe, thermometer, and buffer solutions, while we sell the meter separately. We offer accessories separately as well, such as quinhydrone powder which acts as an electrode in pH measurement. We offer this powder in our kit along with a bottle of pH 4 solution.
  • Sensor storage solutions: It is essential that the sensor electrode remains hydrated at the right pH, usually pH4, when not in use. We offer these bottled solutions in specific quantities such as 59 ml.
  • Replacement sensors: We offer replacement sensors for our digital pH and chlorine testers. This makes it easy to instantly replace the bad sensor with a new one, which is possible in some of the models we offer.

Calibration and Maintenance of pH Digital Testers

Regular calibration and maintenance of pH meters contribute to their long operating life and prevent wrong outputs. Here are some relevant pointers.

  • First, refer to the instruction manual for the calibration procedure.
  • Ensure the pH meter is clean and free of dirt or contaminants. Rinse the electrode with distilled water to ensure this.
  • Switch on the pH meter and look for calibration control buttons.
  • Let the tester stabilize and warm up. Most of our models have automated temperature compensation (ATC) feature.
  • Set the pH tester to 7, which is neutral.
  • The buffer solutions commonly used are of pH values 4, 7, and 10. Some applications may require specific buffer pH values, which need to be customized and procured accordingly.
  • Use the buffer solution that matches the pH value, only after the tester reading stabilizes.
  • Dip the electrode set to neutral in the acidic buffer solution and then in the alkaline buffer solution, after rinsing in distilled water.
  • Most models have 2-point calibration, which is done at pH values of 4 and 10 for acidic and alkaline modes separately.
  • Sometimes, an additional calibration may be required.
  • Once the calibration is completed, finalize it by again rinsing the electrode in distilled water to remove buffer solution traces.
  • An essential maintenance tip here is to clean the electrode in distilled water after each use.
  • If your application demands the use of abrasive chemicals which leaves marks, you can use a mild detergent to clean the pH tester, aside from rinsing it in distilled water.
  • Calibrate the pH meter at least once in a month or as required.
  • Check for any physical signs such as electrode drift, wear, cracks, and so on to be able to repair or replace it on time.

Factors to Consider When Selecting Digital pH and Chlorine Tester

Here are some factors you may want to consider when selecting a digital pH meter for water testing.

  • Analyze your application requirements in terms of the measurement range and accuracy as well as the operating environment. Weigh all these factors against the digital pH and chlorine tester features.
  • Check for the precision and error tolerance in your application, while most water treatment applications have close to zero tolerance for errors. Choose a tester which has a low error margin.
  • Check the calibration type in the pH tester, such as single- or multi-point.
  • Check for the ATC feature in the tester as it helps in auto adjusting the readings based on temperature changes.
  • Check if the tester is handy with a display screen and if it has a user-friendly push button menu.
  • Check for the measurement speed and response time of the tester to display the reading.
  • Prefer a pH tester which has memory to store the previous readings as this comes handy during analysis, especially when onsite.
  • Ensure the device is durable and can withstand harsh industrial environments. Also check for features such as power source and the type and quality of batteries used in the digital pH and chlorine tester.

How to Use Our Digital pH Water Testers?

It’s quite easy to use our digital pH readers. Our pH meters are simple and handy digital devices which measure the hydrogen ion concentration in water sample with the help of a measuring probe connected to a digital meter. The devices come with a display screen. Simply follow these steps to get the right output.

  • Take the water sample in a glass jar and immerse the electrode in it.
  • Ensure the digital pH meter is calibrated to comparative values of known buffer solutions, usually with pH values of 4 and 7. This also depends on your application requirement.
  • Also, ensure you rinse the electrode in distilled water before and after each use.
  • Once you insert the probe in to the water sample or any given liquid, press the appropriate button such as calculate or measure.
  • The pH values will be immediately displayed on the screen, and will gradually stabilize at one value.
  • Once the value stabilizes, remove the probe and rinse it again in distilled water.
  • Clean the electrode using a napkin and store it in an acidic buffer solution when not in use.

Working and Structure of Our Digital pH Meters

Here are some pointers on the working and structure of our pH meter for water treatment processes.

  • pH is the hydrogen ion concentration in a fluid, and its measurement is based on the activity of hydrogen ions rather than the molar concentration.
  • A digital pH meter has a display, responsive and referral electrodes, and a user-friendly menu.
  • The electrode possesses internal and external tubes, wherein the internal tube has calibrated values, while the external tube is made of pH sensitive glass.
  • The measuring probe is usually a glass electrode or an ion-selective transistor. The electrode is sealed at the end with a bulb-like structure.
  • This glass electrode when immersed in the solution develops a charge that relates to the ions’ activity in the sample.
  • The electrodes produce a very minor voltage and the difference in values is noted. Thus, the change in the potential difference is measured and compared with the reference values which are pre-calibrated.

Beneficial Features of Our pH Measurement Probes

It is crucial that water for daily consumption, drinking, swimming, and so on must have a neutral pH. These handy devices offered by Cannon Water offer a number of benefits. Here are some of them.

  • All the models of our digital pH meters are easy to use and accurate. They can be operated with simple push buttons, and the output can be viewed on the display screen.
  • Most models have multiple functionalities, wherein you can measure multiple parameters in water such as pH, temperature, suspended solids, and more with a single device.
  • We also offer regular pH meters with a high power battery and an electrode conductivity cell.
  • You can calibrate them through the keypad. Many models involve one-touch measurement.
  • These power-efficient devices comprise a microprocessor-based surface-mount circuitry and a pH glass sensor which can be easily replaced.
  • Most models have a wide operating temperature range from 0 to around 80 degrees Celsius and beyond.
  • We also offer pH buffer solutions with various values for calibration purposes.

Applications of Digital pH Meters

Our pH water testers are used across industrial segments that require water treatment. Here are some application areas of our digital pH meters.

  • Government level wastewater treatment units: Water treatment is an integral segment of the water supply department at municipal and government level. Here it is used to measure the pH of water bodies
  • Food & beverages: There are many acidity regulators and emulsifiers added to packaged food. Here, it is important to monitor the pH of the final product, especially sauces, gravies, and canned food products.
  • Swimming pools & spas: A neutral to alkaline pH needs to be maintained in swimming pools. Digital pH water testers help monitor and control the pH as required.
  • Industrial wastewater purification: Wastewater from industries needs to be either reused or disposed into the environment. In either cases, pH measurement is important safety factor.
  • Chemicals and Pharmaceutical: pH is important to get the right formulations, and checking it with a pH tester comes handy. It helps control the chemical reactions and ensure safety.
  • Agriculture: pH measurement is an important aspect of soil studies and essential when estimating the types of crops to be grown as well as their nutrient uptake.
  • Environmental: pH measurement and control is essential in various segments of environmental science such as soil studies, pollution level assessment, studying aquatic and marine life and ecosystems, and so on.

If you carry out the water treatment process on a regular basis in your industrial application, you may require good quality digital pH meters as well multi-functional probes. For any such digital meters and probes, we can be your reliable partners and offer you the best possible solutions suited for your application. At Cannon Water Technology, there are no issues about the quality and functionality as our resourceful team is always there to assist you. They will answer all the questions you may have about our digital pH meters, and help you select the right probe. In case of any further information or requirement sharing, you can reach us via phone or email.

Frequently Asked Questions on Digital pH Tester for Water

Here are some FAQs and their answers about digital pH meter for water testing processes.

  • Can I use a single-point calibration instead of a multi-point calibration for my pH meter?

A single-point calibration at pH 7.0 is advisable only if suitable for your applications. Mostly, water treatment applications require pH meters with multi-point calibration using pH 4.0, 7.0, and 10.0 buffers for better accuracy and output.  

  • Can a digital pH meter for water testing measure pH and other parameters, such as chlorine or conductivity?

Yes, it is common to use pH meters with the ability to measure other parameters such as chlorine concentration, conductivity, temperature, TDS, ORP, and more. We offer a variety of such multimeters which come handy in measuring several parameters a water treatment process requires.

  • What is the operating life of a pH electrode?

While we offer good quality pH meters, the operating life of an electrode depends on the application environment, the types of chemicals, acids, and so on it is exposed to, and the overall use. Some well-maintained electrodes can last up to a few years; however, regular maintenance and cleaning is essential.

  • What is automatic temperature compensation (ATC), and why is it important?

ATC is a feature in many of our digital pH meters for water testing. It enables automatic adjustment of pH readings based on the temperature of the sample. This is an important feature because pH values may vary with temperature. Hence, ATC ensures accurate measurements across a range of temperatures.