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pH/ORP Solutions

pH and ORP solutions delivered by South Fork Instruments are tailored to your process needs and conditions. We put together comprehensive systems to make sure you have a reliable, low maintenance solution to ensure maximum measurement uptime.

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Throughout industry, process analytics are becoming more and more important to production quality and cost.

pH and ORP can be applied to many applications.

Industrial pH measurement plays a crucial role in a wide range of industrial processes, from water treatment and food and beverage production to pharmaceutical manufacturing and chemical processing. The ability to accurately monitor and control the acidity or basicity of a solution is essential for optimizing process conditions, improving product quality, reducing costs, and enhancing process safety.

We know that pH/ORP measurement is not just a probe, it’s the right type of probe, coupled with proper installation hardware and a reliable electronic unit. From our range of probes, electronics,­ installation hardware and automated cleaning systems, we supply equipment designed to meet your measurement needs.

APPLICATIONS

    Water and Wastewater Treatment

    pH measurement is used to monitor and control the pH of water and wastewater in order to maintain optimal conditions for treatment processes such as:

    Coagulation/Flocculation:

    When using coagulation to remove suspended solids, the pH of the water plays a crucial role in the process as it affects the charge on the suspended solids/particles, a factor key to the effectiveness of the chemical treatment.

    An optimal pH range for coagulation is typically between 6 and 9. At pH values outside of this range, the effectiveness of coagulants can be greatly reduced. For example, at low pH, the particles in the water may not have enough charge to be effectively removed by the coagulant, while at high pH, the coagulant may become less effective due to the formation of insoluble precipitates.

    Automatic pH control through the addition of pH adjustment chemicals is necessary to maintain optimal conditions for effective coagulation. Furthermore, by keeping pH at the optimal point for coagulation, corrosion of metal and other materials in the system is also avoided, extending plant life and reducing downtime.

    Disinfection:

    Disinfection kills and/or inactivates harmful microorganisms, such as bacteria and viruses, in water and is an important process used in preparing drinking water for human consumption and treating wastewater to ensure it is safe to discharge into the environment

    Establishing the optimal level of pH is very important to the disinfection process. Different disinfectants have different optimal pH ranges for effectiveness, for example chlorine is more effective in a pH range of 6.5 to 8.5, while chlorine dioxide has a wider pH range of 6.0 to 10.0.

    Automatically measuring pH in water/wastewater systems allows the addition of acid or base to maintain pH in the optimal range for the disinfectant being used. It is important to note that employing pH control also avoids the formation of harmful by-products such as trihalomethanes (THMs) and haloacetic acids (HAAs) which form when chlorine or chlorine-based disinfectants are deployed at low pH values.

    The Importance of pH and ORP Measurement in Potable Water
    Table of Contents

    Food and Beverage Production

    Monitoring and controlling pH in food and beverage production processes is very important as it can affect both the quality and the safety of the end product. In order to meet product and regulatory standards, pH control is often deployed in:

    Fermentation: during fermentation processes, such as beer brewing and in cheese making, pH affects the growth and activity of the microorganisms used and can also affect the final product's taste, texture and shelf-life.

    Juice and Beverage Production: pH control is important in the production of juices and beverages as it affects the taste and stability of the final product. For example, acidic beverages such as lemonade should have a pH of around 3.0 - 4.0, while most soft drinks should have a pH of around 2.5 - 4.0.

    Dairy Processing: in the production of dairy products such as yogurt, cheese, and milk, monitoring and controlling pH ensures the quality of the final product. Not only does pH affect the texture and flavor of that final product, and can also affect the growth of microorganisms.

    Preservation: when preserving food products, the goal is to prevent the growth of microorganisms within it. Low pH levels inhibit the growth of microorganisms and therefore extend the shelf-life of the food product.

    In all of these applications, pH measurement and control can be achieved with inline pH sensors and controllers monitoring and adjusting pH as needed to ensure it stays within a desired range.

    Table of Contents

    Bioprocessing

    pH measurement is widely deployed in bioprocessing to monitor and control the pH of fermentation broths and other solutions used in research and development and the production of, drugs, vaccines, and other biopharmaceuticals. pH control is vital as it affects the safety, quality and efficacy of many products made in this industry. Typical pH measurement and control applications in the pharmaceutical and biotechnology industries include:

    Fermentation: when producing products such as vaccines, enzymes, and hormones, pH is an important parameter as it has an impact on the growth and activity of the microorganisms or cells used in the process. The incorrect maintenance of pH levels can affect the final product's purity and potency.

    Cell culture: the growth, metabolism, and survival of cells in a cell culture is dependent upon pH as one of its primary conditions. The pH of the cell culture medium must be carefully controlled to ensure that the cells remain healthy and viable during all stages of the culture.

    Protein purification: pH affects the solubility, stability, and activity of proteins, so to ensure they are not denatured or inactivated during purification, the pH level of buffer solutions used should be carefully controlled.

    Sterilization and Disinfection: the effectiveness of sterilization and disinfection wash processes is, in part, dependent upon pH. pH should be maintained at the optimum level to ensure the maximum effectiveness of the sterilization and disinfection solutions used as this will in turn, ensure the non-viability of unwanted and invasive microorganisms.

    In bioprocessing applications, pH measurements are made with pH sensors and their associated analyzers/controllers in order to monitor and adjust the pH as needed. The bioprocessing industry has particular requirements regarding cleanliness and material compatibility, so probe selection is an important factor to ensure compliance.

    Table of Contents

    Chemicals and Petrochemicals

    pH measurement is used in many process streams in the production of chemicals and petrochemicals. Measurements are used to ensure product quality, improve manufacturing efficiency, and monitor any safety and environmental impacts that may arise. Common pH control applications in the chemical and petrochemical industries are:

    Acid-base neutralization: in acid-base neutralization reactions where acids and bases are mixed to neutralize each other, pH of the mixture must be carefully monitored to ensure that the right amount of dosing chemical is used to achieve the desired pH level.

    Oxidation and reduction reactions: pH measurement is a critical component is oxidation and reduction reactions because pH often affects the activity of catalysts and therefore, the rate of reaction. pH of the reaction mixture should be carefully controlled to ensure that the reactions proceed efficiently and safely.

    Wastewater treatment: pH control is important in the treatment of wastewater from refineries and chemical plants. Before either recycling as plant water or discharge, wastewater must be “cleaned-up” to ensure it is safe and suitable to use in plant equipment and out in the environment respectively. Water treatment varies from plant to plant and a veritable “soup” of [expensive] chemicals are used. Accurate and reliable pH measurement is a must if clean-up costs are to be kept as low as possible.

    Refining and Petrochemical processing: pH control is important in refining and petrochemical processing, where the pH affects the efficiency and safety of the processes. The pH of the process streams should be carefully controlled to ensure that these processes can run with optimum efficiency and safety.

    Refex Probes Resist Oil Contamination
    Play Video

    In all these applications, pH measurement and control is often done with specialized pH sensors designed to tolerate what are often challenging process conditions. Signal from these pH measurements can be integrated into plant process control systems to provide real time display and automated control of pH.

    Table of Contents

    Pulp and Paper

    The production of pulp and paper relies heavily on pH measurements throughout the production process to ensure high quality product. Typical pH control applications in the pulp and paper industry includes:

    Pulping: the pH of pulp must be carefully controlled to ensure that fibers are separated efficiently and the pulp quality is maintained.

    Bleaching: pH affects the efficiency of the bleaching agents, so ensuring the correct pH in bleaching towers is maintained contributes greatly to product quality and process throughput.

    Recycling: The pH of the recycled pulp should be carefully controlled to ensure that addition to the virgin pulp stream does not degrade pulp quality.

    Effluent treatment: effluent from settling and treatment ponds must be constantly monitored to ensure that the pollutants are removed or neutralized before being released into the environment.

    Coating: coating solutions are designed to perform effectively in controlled application conditions. pH is one of the parameters that should be carefully controlled to ensure coating quality and efficiency.

    Deinking: deinking agents, like coating solutions, work best when added to solutions in a controlled environment; pH is one parameter that should be tightly controlled for optimal deinking in paper recycling plants.

    Pulp and paper plants are a challenging environment for instrumentation and require robust sensing elements that will provide accurate and reliable measurement over a long period of time. pH/ORP sensors used in pulp and paper applications must be suitable for these [often] harsh conditions.

    Table of Contents

    Power Generation

    Measuring the pH of boiler feedwater and other water systems in power plants is done to prevent corrosion and optimize system efficiency.

    Boiler water treatment: the pH of boiler feedwater should be carefully controlled to ensure that impurities are removed and a high standard of water quality is maintained.

    Cooling water treatment: cooling water is dosed with chemicals to prevent, in part, growth of organics and maintain overall cleanliness. pH control is a key part of cooling water treatment as it maintains the cooling water at the right level for dosing chemical efficiency

    Flue gas desulfurization(FGD): typically, a weak alkaline solution such as sodium hydroxide (NaOH) is used in FGD. It reacts with SO2 in the flue gas to form a sulfite salt that can then be removed. pH control is important in this process to ensure that the reaction between SO2 and the scrubbing solution is efficient and effective.

    Boiler water is ultra-pure water and as such, poses specific challenges to pH measurements because of low conductivity. Using the right type of pH probe is essential for reliable measurement.

    Table of Contents

    Oil and Gas Production

    In oil and gas production, accurate pH measurement and control is used to prevent problems such as scaling, corrosion, and fouling, all of which can lead to downtime and reduced production efficiency. pH systems are deployed through O&G production facilities:

    Produced water treatment: produced water is water that is brought to the surface along with oil and gas and is considered hazardous waste as it contains heavy metals, volatile organic compounds, and radioactive materials, as well as high levels of salts and dissolved solids. After separation, it may need to be treated or disposed of in an underground injection well, an evaporation pond, or a treatment plant that removes these hazardous contaminants. However it is handled, pH measurement is a baseline parameter needed during the process.

    Injection and frac water treatment: water injected into oil and gas reservoirs to improve production must be cleaned and conditioned to ensure it does not damage the reservoir geology or any associated production equipment. pH measurement and control during the cleanup and conditioning process ensures the proper pH level for chemicals added to enhance recovery from the well.

    Scale and corrosion control: production equipment and piping can be adversely affected by scaling and corrosion if flowing fluids are too acidic or too basic. Maintaining pH at a more neutral level reduces consumption of corrosion and scaling inhibitor chemicals to keep operating costs lower.

    Emulsion breaking: for maximum oil recovery, the pH of the oil/water emulsions should be carefully controlled to ensure that the emulsion is broken and therefore, oil can be efficiently separated from the water.

    Refex Probes Resist Oil Contamination

    Play Video

    pH measurement and control systems must be able to withstand the harsh conditions often encountered in oil and gas production, including high temperatures, corrosive substances, and fluctuations in pressure. Measurements are often made in fluids with entrained oil, so pH and ORP probes must be carefully selected for suitability to each application if they are to perform satisfactorily.

    Table of Contents

    Metal Processing

    The metal processing industry uses pH control in many stages of their production processes. Some typical pH control applications in the metal production and processing industry include:

    Metal plating: in order to ensure that plating thickness and quality is consistent, the pH of the plating bath must be kept stable and at the right level. Any probes used must be resilient to the metal ions present in the process.

    Metal cleaning: where dirt, oil and other contaminants are removed from the surface of the metal by chemical means. the pH of the cleaning solution should be carefully controlled to ensure that the cleaning process is effective and that the metal being cleaned is not damaged.

    Metal pickling: in pickling, a strong acid such as hydrochloric or sulfuric is used to remove oxides and scale from the surface of the metal in preparation of further processing such as electroplating, welding, or painting. The pH of the pickling solution should be carefully controlled to ensure that the pickling process is effective.

    Metal passivation: acids are used to make the surface of metals such as iron and steel more resistant to corrosion through the process of passivation. The concentration of the acid in the passivation bath should be carefully controlled to ensure that the right level of passivation occurs.

    Effluent treatment: many metal treatment processes use strong acids. Once spent, the solutions must be neutralized before discharge into public sewer systems to ensure they can be dealt with at treatment plants. pH measurement and control is a highly necessary in ensuring compliance to discharge requirements are met.

    The solutions used in metal processing require tight control to ensure quality of the end result. However, they often contain metal ions and solids that can quickly poison the pH probes used to control their makeup, resulting in off-spec solutions and poor quality. Probes used must be resilient to attack from these solutions if they are to be effective in their task.

    pH Neutralization Solutions for Industrial Wastewater
    Table of Contents

    Aquaculture

    In industrial aquaculture, pH control is crucial for maintaining optimal water conditions for fish and other aquatic organisms. The pH level in the water can affect the health and growth of the organisms, as well as the efficiency of water treatment processes.

    Fish hatcheries: to ensure the survival and growth of fish eggs and subsequent fry from them, the pH level in the water needs to be carefully controlled. A pH level that is too high or too low can result in poor survival rates and slow growth.

    Recirculating aquaculture systems (RAS): pH measurement and control is used to maintain water quality and prevent the buildup of harmful bacteria. In RAS, pH control is typically achieved by adjusting the water flow rate and using chemical treatments.

    Aquaponic systems: aquaponic systems are where fish and plants are grown together in a symbiotic relationship. The pH level needs to be maintained at a level that is optimal for both the fish and the plants and can vary from system to system depending on the type of fish and plants used.

    Overall, pH control is a critical aspect of industrial aquaculture, as it directly impacts the health and growth of the aquatic organisms and the overall efficiency of the aquaculture systems.

    Table of Contents

    Have an application we can help you with? Take a quick moment to get in touch with our expert sales engineers and technologists and we'll guide you to a solution.

    Frequently Asked Questions

    What are the advantages of Memosens technology in pH probes? Expand

    There are several advantages to using Memosens technology in pH (and other parameter) probes and sensors:

    Improved measurement performance: Memosens technology uses digital communication to transmit data from the pH probe to the measurement instrument, eliminating the need for analog signal conditioning and therefore reducing measurement errors caused by electrical noise or interference.

    Reduced maintenance requirements: Memosens technology uses a digital sensor platform that enables the pH probe to store sensor-specific data, such as calibration data, in a non-volatile memory. This means that calibration of sensors can be carried out remotely in clean and controlled conditions. The calibrated probe is taken to the field and once connected to an analyzer, uploads this stored data to the analyzer electronics.

    Reduced downtime: Because of the ability to calibrate sensors remotely, the pH measurement system need only be offline for as long as it takes to extract, replace and reinsert a sensor in the process. Using a retractable probe housing means that in many cases, the process can be running while this substitution is carried out

    Traceability: Apart from calibration data, sensors with Memosens technology also store serial number, model number and date of manufacture. For some applications, they can also store the number of calibrations, number of sterilizations, date of commissioning and hours in operation. In a cGMP environment, this traceability provides additional certainty to calibration routines and records.

    Is a Memosens measuring point more expensive than an analog measuring point? Expand

    No. The costs are actually about the same. The slightly higher price of the Memosens sensors is offset by the omission of specialized analog input circuitry in the transmitter.

    What are the advantages of the different types of reference cell interfaces in pH probes? Expand

    There are three basically different types of reference interface available for industrial pH and ORP probes:

    • PTFE Diaphragm
    • Ceramic Diaphragm (sometimes ground glass)
    • REFEX Polymeric Interface

    Diaphragms are porous pathways between the reference electrode in its electrolyte and the process. They serve to complete the electrical connection between the outside of the pH sensitive glass sensor and the connected analyzer electronics. The Refex polymeric interface does the same thing but without a porous junction.

    Porous PTFE diaphragms are highly resistant to chemical attack and can withstand high pressures and temperatures. In applications where coating and fouling are common, their large size makes them more tolerant to build up. However, as they have quite large pores, the reference electrolyte is diluted at a faster rate (relative to other diaphragm types) so salt reserves in the reference chamber (internal salt rings) are recommended to provide better stability when in operation. Poisoning is also a problem, so double junction arrangements and ion traps are highly recommended to reduce the effect of material getting into the electrode chamber.

    Ceramic diaphragms are typically much smaller than PTFE diaphragms so electrolyte dilution rate, and therefore measurement drift, is much lower. Being smaller, ceramic diaphragms are however susceptible to occlusion and blockage from coatings, so are better suited to cleaner applications.

    Refex reference interfaces are non-porous, making them highly suitable for aggressive and extreme applications as it is not possible to dilute or poison the reference electrolyte. Oily and other coatings do not impede measurement. They do have a higher reference impedance when compared to porous junction electrodes (<100kΩ vs. ~1kΩ), making them incompatible with some pH analyzers with built in diagnostic capabilities. Dual high impedance input analyzers are also highly recommended for the best performance.

    For best performance, reliability and longevity, the pH/ORP sensor chosen should always use a reference technology that best suits the process conditions.

    Should I use a flowing reference junction electrode for ultra-pure water (UPW) pH measurement? Expand

    The use of flowing junction electrodes is quite common in UPW applications to prevent measurement drift due to electrolyte dilution. Electrodes with porous junctions allows the interchange of UPW with the electrolyte in the reference cell of a probe. As the electrolyte becomes diluted, the measurement will drift. Using a flowing junction electrode will ensure that the electrolyte salt concentration remains constant, ensuring a stable measurement. However, flowing junction electrodes require a lot of maintenance as the electrolyte in the probe reservoir must be replenished often. Alternatives are to use a differential pH probe, a probe with reserve salt rings or a refex non-porous probe. All provide a lower maintenance option for UPW pH measurement.

    What are salt rings in a pH sensor for? Expand

    Salt rings act as a salt reserve to replenish the reference electrolyte as it is diluted by the process stream over time. This extends the working life of the sensor and provides a visible indication of when the electrode is exhausted and should be replaced. Salt rings should be included in sensors used in applications with low ionic conductivity such as boiler feed water pH measurement and WFI.

    Do I need to store a Memosens pH sensor in the same way as an analog one? Expand

    Yes. The only difference between Memosens sensors and analog sensors is that the Memosens has a small electronic chip built in to the sensor head. Memosens and analog sensors are alike in that the pH electrode bulb and reference junction need to be kept hydrated. When storing, place the sensor in a small amount of storage solution or fit a hydration cap with storage solution in it over the end of the sensor. Refex sensors should also be kept hydrated in the same way.

    NEVER STORE A pH ELECTRODE IN PURIFIED WATER as this will shorten the life of the sensor. The reference cell is filled with a salt solution. Placing the probe in purified water will cause the salt solution to become diluted through diffusion. Storage solution is formulated to maintain the reference cell salt concentration and also has chemicals to keep bacteria and fungus from growing in the solution. If storage solution is not available then use pH 4 buffer.

    What distinguishes Refex electrodes from other brands? Expand

    Like most pH sensors, Refex electrodes have a standard cell with pH sensitive glass. They differ from other sensors in that they have a non-porous reference junction.

    Basically, most pH/ORP sensors have a porous junction—ceramic or Teflon frit/diaphragm, wood stack, ‘solid’/immobilized gel, even paper—that creates an intimate connection between process fluid and the actual reference electrode. Because of this intimate connection, process fluids and the reference cell electrolyte can intermingle, causing undesirable effects such as drift and poisoning.

    Refex pH/ORP combination sensors have an impermeable barrier between the process liquid that you’re measuring and the electrode’s reference half-cell and electrolyte—essentially, no liquid-liquid contact. The reference cell is sealed for life. The barrier surrounding the Ag/AgCl reference half-cell is a solid polymeric casing that has a large immobilized KCl loading, making it electrically conductive.

    What is the best way to clean a pH probe? Expand

    Glass electrodes are extremely sensitive to external damage and need careful handling or you could damage them permanently.

    1. Do not "wipe" or rub the electrode.
      The glass used in electrodes is fragile and can easily be scratched. Rubbing an electrode can also create an electrostatic charge which may make the signal unstable and pH readings inaccurate.
    2. Swirl the electrode gently in the cleaning solution.
      It's important not to knock it into the sides of your cleaning solution container while cleaning it, as this can break or damage it. The electrode does not need the cleaning solution to be pressure-washed against it to be effective. Let the solution soak into the impurities/contaminants and chemically remove them.
    3. Gently rinse with deionized water.
      In between gentle swirls in the cleaning solution and after you've finished cleaning, lightly rinse the electrode with deionized water. It's important not to leave any cleaning solution on the electrode after cleaning, as this could affect the pH sensor performance. Always use deionized or distilled water. Using tap water can create an electrostatic charge that might make your readings inaccurate.

    Once clean, store your electrode in storage solution, or if that isn’t available, a 4 pH buffer. NEVER STORE YOUR ELECTRODE IN WATER.

    What are the practical and financial benefits of using Refex electrodes? Expand

    One of the most significant benefits is probe lifetime. Refex electrodes last much longer in areas where porous junction pH/ORP sensors are quickly destroyed.

    For example, in the oil and gas industry, the fluids that you’re dealing with are often reactive, volatile, and corrosive (and definitely not something you want to get on yourself). Refex electrodes have been reported to last five times as long (or longer) in these extreme applications, compared to porous junction electrodes. In some cases where porous junction reference electrodes last only days—such as chemical production or bioreactors where it’s necessary to measure pH under pressure—Refex electrodes deliver excellent performance.

    Although Refex sensors are more expensive up front, they are worth every penny. In the long term, you'll spend much less money on replacement probes and spend much less time maintaining them. Plus, with faster response to pH change and more accurate readings, you can count on faster corrections to chemical imbalances, helping improve process efficiency by preventing correction chemical overdosing (reducing costs further).

    Refex sensors can dramatically reduce plant downtime, and for any company focused on manufacturing, reducing downtime is absolutely essential to running an economically efficient operation.

    What is the lifespan of an electrode? Expand

    This depends very much upon the application/process the probe is used in. Probes in clean, benign applications like swimming pools can last for years, while those in aggressive applications, like chlor-alkali processes might be spent within a matter of days!

    To get the maximum lifespan out of a pH probe in any application, the first step is to choose one that is suited to that process. The main point of failure in a pH probe is the reference junction. For clean applications – those without solids or adherent material in the stream, a probe with a ceramic diaphragm as it is cost effective solution as it has a small contact area with the process. For “dirty” applications, a probe with a PTFE diaphragm is a good idea. Material does not readily stick to PTFE and it has a large surface area. For processes with chemicals and substances likely to poison the electrode, a non-porous electrode is a good choice.

    But no matter the quality of the electrode, at some point cleaning will be necessary. But glass electrodes can be very sensitive, and must be handled with care during cleaning. Bear in mind, pH electrodes are not made to last forever, nor should they be expected to. No matter what your dedication is to regular cleaning and maintenance, eventually they will need to be replaced.

    Selection and implementation of a probe suited to the process is a key decision up front. Thereafter, proper care and maintenance are essential to get the most out of your pH/ORP sensors and keeping your readings accurate. Frequent manual cleaning or the use of an automated cleaning system will enable you to get the longest possible life out of each electrode.

    What makes Refex electrodes resistant to fouling and coating? Expand

    Fouling and coating are one of the major reasons pH/ORP probes require frequent maintenance and recalibration. The problem is with the porous liquid junction of the reference electrode. This porous junction, whether ceramic, PTFE, paper, or even wood, can over time become clogged by process medium, increasing impedance and affecting performance.

    Clogging can become so significant that the electrode stops responding at all. Lime scale, manganese, precipitation between hydrogen sulfides and AgCl, and protein/fat build up in sewage and industrial effluents are all examples of material that can affect electrode performance in this way. Fine particle clogging—pigments and dye stuffs, etc.—are particularly bad and have been known to shorten electrode life considerably.

    One solution to this problem has been to use a flowing junction electrode where liquid electrolyte is pressurized to create a positive KCl outflow through the junction, keeping it clear of contaminants. While this helps, it is maintenance and consumable intensive. Another solution is to use an automated cleaning system like the EXmatic 470. These systems periodically withdraw the probe from the process, rinse it off and reinsert it. These work well, but will not necessarily remove material already lodged in the probes’ connective diaphragm.

    Refex electrodes are very resistant to fouling and buildup. Being non-porous, there is nothing to block, and provided any coating on the electrode is conductive, will continue to operate as if clean. Note that eventually, it will be necessary to clean off heavy buildup from the electrode; it is difficult to accurately measure the process with the electrode buried in its own ‘micro-environment’ of buildup.

    Is it possible to automate electrode cleaning? Expand

    Cleaning electrodes is a labor-intensive process, particularly with pH electrodes in process applications that are used continuously and access to them for service becomes a challenge.

    For manual cleaning of probes in process installations, devices such as the Exner EXtract-M are available to allow probes to be withdrawn from the process while the process line is live. Safety interlocks in these retractable housings ensure that the process is properly isolated while the probe is removed for cleaning and servicing. For additional safety, these devices are fitted with cleaning ports to allow process fluids to be rinsed from electrodes before they are removed and handled.

    A further step is to use an automated retraction system with a cleaning controller, such as the Exner EXtract and EXmatic products. These systems will retract a pH (or other parameter) probe from a process and execute a pre-programmed cleaning cycle on the electrode without the need for anyone to be present. Maintenance on such a system is just to ensure a local supply of the required cleaning solution(s) remains stocked. Automated systems allow pH probes to be cleaned far more frequently than manual cleaning alone and this translates into much longer electrode life.

    Have more questions? Take a quick moment to get in touch with our expert sales engineers and technologists and we'll guide you to a solution.

    SOUTH FORK INSTRUMENTS IS COMMITTED TO SOLVING YOUR FACTORY AND PROCESS AUTOMATION CHALLENGES

    Using effective communication and an in-depth understanding of your industry to develop practical solutions for your measurement needs.

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    SOUTH FORK INSTRUMENTS
    3845 Buffalo Road
    Auburn, CA 95602
    Tel: (+1) 925-461-5059
    Fax: (+1) 925 553 3531

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