Measuring probes / electrodes
The Neomeris Chlorine Dioxide Sensors are specifically designed for disinfection applications in water treatment and swimming pools. There is a choice of three different ppm chlorine dioxide measurement ranges for your measurement. The basis here ist the amperometric measurement.Typical further applications are: Industrial waste waterCooling waterBottle rinsingIrrigation water in agricultureand many others.Signal outputThe measured value is easily and reliably transferred to your control or display system by means of a 4-20mA signal with a scaling of 0-2, 0-5 or 0-10ppm.MaintenanceThe membrane cap mounted on the sensor, as well as the included electrolyte solution, are easily replaceable by the user. This regular maintenance on the sensor helps to extend the service life in the application and to always obtain an optimal measurement result. MountingThe sensor is mounted in the separately available flow cell and, in addition to this, we offer you the flow meter required for this to ensure stable measurement.Scope of delivery: 1 pcs. Chlorine Dioxide 4-20mA Sensor 2 pcs. replacement cap & brand 2 pcs. 30mL refill solution 3 pcs. cathode polishing squares
Our Neomeris Free Chlorine Sensors are specifically designed for disinfection applications in water treatment and swimming pools. There is a choice of four different ppm free chlorine measurement ranges. (Determination of free chlorine by amperometric method)Typical further applications are: Industrial waste waterCooling waterBottle rinsingIrrigation water in agricultureand many others.Signal outputThe measured value is easily and reliably transferred to your control or display system by means of a 4-20mA signal with a scaling of 0-2, 0-5, 0-10 or 0-20ppm.MaintenanceThe membrane cap mounted on the sensor, as well as the included electrolyte solution, are easily replaceable by the user. This regular maintenance on the sensor helps to extend the service life in the application and to always obtain an optimal measurement result. MountingThe sensor is mounted in the separately available flow cell and, in addition to this, we offer you the flow meter required for this to ensure stable measurement.Scope of delivery: 1 pcs. Free Chlorine 4-20mA Sensor 2 pcs. replacement cap & brand 2 pcs. 30mL refill solution 3 pcs. cathode polishing squares
The JUMO "Heavy Duty" pH electrode records the pH value of water and aqueous media. The rugged industrial electrode is designed for the most demanding applications with increased dirt and toxic loads as well as oily media.Advantages:stable and reliable measured values low maintenance and robustextended service lifeSelected version:without temperature sensorS8 N-srew head Pg13,5, PPS materialPTFE ring diaphragmInsertion length 120mm (standard)Type code (can also be found on your electrode): 201021/10-12-04-18-120/841Features: for industrial applications; also in heavy-duty and hygienic version for demanding processes; integrated temperature sensorApplication range: process measurement; high temperature applications; suspensions; electroplating; lacquers; waste water; ultrapure water; water; always contaminated media; hygienic and sterile applications; boiler feed water If you require other versions of this electrode, please use our configurator and configure the suitable electrode for you. You can download the JUMO data sheet just below our text. You will find our configurator on page 6 of the data sheet. Please note that the delivery time for freely configured electrodes is 5 to 6 weeks.
The JUMO "Heavy Duty" pH electrode records the pH value of water and aqueous media. The rugged industrial electrode is designed for the most demanding applications with increased dirt and toxic loads as well as oily media.Advantages:stable and reliable measured values low maintenance and robustextended service lifeSelected version:PT1000 temperature sensorVarioPin electrode head (always required for versions with temperature sensor)Hole diaphragmInsertion length 120mm (standard)Type code (can also be found on your electrode): 201021/10-12-11-18-120/841Features: for industrial applications; also in heavy-duty and hygienic version for demanding processes; integrated temperature sensorApplication range: process measurement; high temperature applications; suspensions; electroplating; lacquers; waste water; ultrapure water; water; always contaminated media; hygienic and sterile applications; boiler feed water If you require other versions of this electrode, please use our configurator and configure the suitable electrode for you. You can download the JUMO data sheet just below our text. You will find our configurator on page 6 of the data sheet. Please note that the delivery time for freely configured electrodes is 5 to 6 weeks.
The JUMO "Heavy Duty" pH electrode records the pH value of water and aqueous media. The rugged industrial electrode is designed for the most demanding applications with increased dirt and toxic loads as well as oily media.Advantages:stable and reliable measured values low maintenance and robustextended service lifeSelected version:PT100 temperature sensorVarioPin electrode head (always required for versions with temperature sensor)PTFE ring diaphragmInsertion length 120mm (standard)Type code (can also be found on your electrode): 201021/10-12-04-18-120/840Features: for industrial applications; also in heavy-duty and hygienic version for demanding processes; integrated temperature sensorApplication range: process measurement; high temperature applications; suspensions; electroplating; lacquers; waste water; ultrapure water; water; always contaminated media; hygienic and sterile applications; boiler feed water If you require other versions of this electrode, please use our configurator and configure the suitable electrode for you. You can download the JUMO data sheet just below our text. You will find our configurator on page 6 of the data sheet. Please note that the delivery time for freely configured electrodes is 5 to 6 weeks.
The JUMO "Heavy Duty" pH electrode records the pH value of water and aqueous media. The rugged industrial electrode is designed for the most demanding applications with increased dirt and toxic loads as well as oily media.Advantages:stable and reliable measured values low maintenance and robustextended service lifeSelected version:PT1000 temperature sensorVarioPin electrode head (always required for versions with temperature sensor)PTFE ring diaphragmInsertion length 120mm (standard)Type code (can also be found on your electrode): 201021/10-12-04-18-120/841Features: for industrial applications; also in heavy-duty and hygienic version for demanding processes; integrated temperature sensorApplication range: process measurement; high temperature applications; suspensions; electroplating; lacquers; waste water; ultrapure water; water; always contaminated media; hygienic and sterile applications; boiler feed water If you require other versions of this electrode, please use our configurator and configure the suitable electrode for you. You can download the JUMO data sheet just below our text. You will find our configurator on page 6 of the data sheet. Please note that the delivery time for freely configured electrodes is 5 to 6 weeks.
The Neomeris Chlorine Dioxide Sensors are specifically designed for disinfection applications in water treatment and swimming pools. There is a choice of three different ppm chlorine dioxide measurement ranges for your measurement. The basis here ist the amperometric measurement.Typical further applications are: Industrial waste waterCooling waterBottle rinsingIrrigation water in agricultureand many others.Signal outputThe measured value is easily and reliably transferred to your control or display system by means of a 4-20mA signal with a scaling of 0-2, 0-5 or 0-10ppm.MaintenanceThe membrane cap mounted on the sensor, as well as the included electrolyte solution, are easily replaceable by the user. This regular maintenance on the sensor helps to extend the service life in the application and to always obtain an optimal measurement result. MountingThe sensor is mounted in the separately available flow cell and, in addition to this, we offer you the flow meter required for this to ensure stable measurement.Scope of delivery: 1 pcs. Chlorine Dioxide 4-20mA Sensor 2 pcs. replacement cap & brand 2 pcs. 30mL refill solution 3 pcs. cathode polishing squares
Our Neomeris Free Chlorine Sensors are specifically designed for disinfection applications in water treatment and swimming pools. There is a choice of four different ppm free chlorine measurement ranges. (Determination of free chlorine by amperometric method)Typical further applications are: Industrial waste waterCooling waterBottle rinsingIrrigation water in agricultureand many others.Signal outputThe measured value is easily and reliably transferred to your control or display system by means of a 4-20mA signal with a scaling of 0-2, 0-5, 0-10 or 0-20ppm.MaintenanceThe membrane cap mounted on the sensor, as well as the included electrolyte solution, are easily replaceable by the user. This regular maintenance on the sensor helps to extend the service life in the application and to always obtain an optimal measurement result. MountingThe sensor is mounted in the separately available flow cell and, in addition to this, we offer you the flow meter required for this to ensure stable measurement.Scope of delivery: 1 pcs. Free Chlorine 4-20mA Sensor 2 pcs. replacement cap & brand 2 pcs. 30mL refill solution 3 pcs. cathode polishing squares
Our Neomeris Free Chlorine Sensors are specifically designed for disinfection applications in water treatment and swimming pools. There is a choice of four different ppm free chlorine measurement ranges. (Determination of free chlorine by amperometric method)Typical further applications are: Industrial waste waterCooling waterBottle rinsingIrrigation water in agricultureand many others.Signal outputThe measured value is easily and reliably transferred to your control or display system by means of a 4-20mA signal with a scaling of 0-2, 0-5, 0-10 or 0-20ppm.MaintenanceThe membrane cap mounted on the sensor, as well as the included electrolyte solution, are easily replaceable by the user. This regular maintenance on the sensor helps to extend the service life in the application and to always obtain an optimal measurement result. MountingThe sensor is mounted in the separately available flow cell and, in addition to this, we offer you the flow meter required for this to ensure stable measurement.Scope of delivery: 1 pcs. Free Chlorine 4-20mA Sensor 2 pcs. replacement cap & brand 2 pcs. 30mL refill solution 3 pcs. cathode polishing squares
The Neomeris Chlorine Dioxide Sensors are specifically designed for disinfection applications in water treatment and swimming pools. There is a choice of three different ppm chlorine dioxide measurement ranges for your measurement. The basis here ist the amperometric measurement.Typical further applications are: Industrial waste waterCooling waterBottle rinsingIrrigation water in agricultureand many others.Signal outputThe measured value is easily and reliably transferred to your control or display system by means of a 4-20mA signal with a scaling of 0-2, 0-5 or 0-10ppm.MaintenanceThe membrane cap mounted on the sensor, as well as the included electrolyte solution, are easily replaceable by the user. This regular maintenance on the sensor helps to extend the service life in the application and to always obtain an optimal measurement result. MountingThe sensor is mounted in the separately available flow cell and, in addition to this, we offer you the flow meter required for this to ensure stable measurement.Scope of delivery: 1 pcs. Chlorine Dioxide 4-20mA Sensor 2 pcs. replacement cap & brand 2 pcs. 30mL refill solution 3 pcs. cathode polishing squares
Our Neomeris Free Chlorine Sensors are specifically designed for disinfection applications in water treatment and swimming pools. There is a choice of four different ppm free chlorine measurement ranges. (Determination of free chlorine by amperometric method)Typical further applications are: Industrial waste waterCooling waterBottle rinsingIrrigation water in agricultureand many others.Signal outputThe measured value is easily and reliably transferred to your control or display system by means of a 4-20mA signal with a scaling of 0-2, 0-5, 0-10 or 0-20ppm.MaintenanceThe membrane cap mounted on the sensor, as well as the included electrolyte solution, are easily replaceable by the user. This regular maintenance on the sensor helps to extend the service life in the application and to always obtain an optimal measurement result. MountingThe sensor is mounted in the separately available flow cell and, in addition to this, we offer you the flow meter required for this to ensure stable measurement.Scope of delivery: 1 pcs. Free Chlorine 4-20mA Sensor 2 pcs. replacement cap & brand 2 pcs. 30mL refill solution 3 pcs. cathode polishing squares
- 1 side connected to solenoid valve connector without seal ("Plug and Play", as plug only has to be plugged onto measuring cell)- 1 side labelled cable with wire end ferruleswhite: PT100brown: PT100yellow: Measuring cell SL green: Measuring cellblue: shielding
- 1 side connected to solenoid valve connector without seal ("Plug and Play", as plug only has to be plugged onto measuring cell)- 1 side labelled cable with wire end ferruleswhite: PT100brown: PT100yellow: Measuring cell SL green: Measuring cellblue: shielding
Our flow cell kit is a simple and economical means of mounting pH and ORP electrodes for inline applications. Compatible with all 12 mm electrodes.
Our flow cell kit is a simple and economical means of mounting pH and ORP electrodes for inline applications. Compatible with all 12 mm electrodes.
Frequently Asked Questions What equipment can I use it with? Ideal for sensors, measuring instruments or control units with a 4-wire connection. Is the cable shielded? Yes, the cable has a shield that reduces interference. Is the cable easy to install? Yes, the cable is flexible enough for use in conduits, cable ducts or for open-lay installation. Is the cable robust enough for workshop or industrial use? Yes, it withstands normal wear and tear in protected environments. Is the cable available in other lengths? We currently offer 25-metre and 50-metre versions. How can I correctly identify the individual wires when connecting them? Each of the four wires is colour-coded; the instructions will help you with the connection.
Frequently Asked Questions What equipment can I use it with? Ideal for sensors, measuring instruments or control units with a 4-wire connection. Is the cable shielded? Yes, the cable has a shield that reduces interference. Is the cable easy to install? Yes, the cable is flexible enough for use in conduits, cable ducts or for open-lay installation. Is the cable robust enough for workshop or industrial use? Yes, it withstands normal wear and tear in protected environments. Is the cable available in other lengths? We currently offer 25-metre and 50-metre versions. How can I correctly identify the individual wires when connecting them? Each of the four wires is colour-coded; the instructions will help you with the connection.
It is particularly suitable wherever a fixed installation with Pg13.5 thread, a direct BNC connection, and a robust, service-life-optimized redox measurement are required. JUMO BlackLine Redox plastic shaft electrode with salt bridge, 2 meter fixed cable with BNC connector and fixed protective cage, Pg13.5 (Type code: 201010/65-22-65-2000-76-120/837; Part No.: 00424950) This JUMO BlackLine Redox electrode is the right choice when a robust, permanently installable, and ready-to-connect solution for redox measurements in aqueous media is required. The Pg13.5 screw head allows secure installation in suitable fittings or measurement points, while the pre-attached 2 meter fixed cable with BNC connector enables direct connection to compatible measuring instruments. This makes this version especially convenient for users who want a reliable redox electrode without additional wiring effort. Advantages For redox measurement, the electrode is equipped with a robust platinum tip, which provides reliable measurement values and is easy to clean. This is a clear advantage in applications where redox values must be monitored regularly. The fixed protective cage additionally protects the sensitive sensor area and improves suitability for everyday use, especially at measurement points where the sensor may be exposed to higher mechanical stress. Another advantage is the integrated salt bridge. It is particularly useful when measuring in low-ion media or at higher flow rates. In such cases, it can help extend the electrode’s service life. This makes it a strong choice for users who are looking for more than a standard redox electrode and need a version suitable for more demanding operating conditions. Technical data The reference system with polymerized KCl gel electrolyte is suitable for many general water applications. The proven cartridge reference system helps keep the electrolyte free of silver ions throughout its service life, making it less susceptible to certain electrode poisons. An integrated temperature sensor is not available in this series. The 120 mm insertion length makes the electrode suitable for many common installation situations. Typical applications Drinking water monitoring Water treatment, swimming pools, aquatics Greenhouse technology as well as lightly contaminated utility, process, and wastewater Also suitable for rainwater, pond, and surface water Not recommended for: Electroplating water treatment Industrial process and wastewater Ultrapure water Therapeutic baths Biotech and sterilization processes
It is particularly useful wherever a robust, ready-to-connect, and service-life-optimized redox measurement is required, for example in drinking water monitoring or aquatics. JUMO BlackLine Redox plastic shaft electrode with salt bridge, 2 meter fixed cable without thread with BNC connector and fixed protective cage (Type code: 201010/65-22-45-2000-76-120/837; Part No.: 00417301) This version of the JUMO BlackLine Redox electrode is a good choice when a robust and ready-to-connect solution for redox measurement in aqueous media is required. Thanks to its permanently attached 2 meter cable with BNC connector, the sensor can be quickly integrated into suitable measurement systems without additional connection cables. This version offers clear advantages, especially in applications where simple installation, a protected sensor design, and easy day-to-day handling are important. Advantages of the JUMO BlackLine electrode For redox measurement, a robust platinum tip is used, which provides reliable measurement values and is easy to clean. This makes the electrode particularly interesting for users who require a sensor for regular measurement tasks while valuing a low-maintenance design. The integrated protective cage additionally protects the sensitive sensor area and is especially useful when the electrode is frequently used, moved, or exposed to more demanding environments. Another advantage of this version is the integrated salt bridge. It is particularly recommended for low-ion media or higher flow rates, as it can help extend the electrode’s service life. This makes it a strong choice for users who are not only looking for a standard redox electrode but for a version suitable for more challenging operating conditions. Technical data The reference system with polymerized KCl gel electrolyte is suitable for many general water applications and supports reliable measurement in aqueous media. An integrated temperature sensor is not available in this series. With a standard insertion length of 120 mm and a head design without thread, this version is particularly suitable for applications where direct cable connection via BNC connector is preferred. Typical applications Drinking water monitoring and water treatment Swimming pools, aquatics, greenhouse technology Lightly contaminated utility, process, and wastewater Also suitable for rainwater, pond, and surface water Not recommended for: Electroplating water treatment Industrial process and wastewater Ultrapure water Therapeutic baths Biotech and sterilization processes
This electrode is particularly suitable wherever a fixed installation with Pg13.5 thread, a direct cable connection, and a protected sensor design are required. JUMO BlackLine pH plastic shaft electrode with salt bridge, 2 meter fixed cable with BNC connector and fixed protective cage, Pg13.5 (Type code: 201005/65-18-65-2000-76-120/837; Part No.: 00424828) This version of the JUMO BlackLine pH electrode is ideal when a robust, ready-to-connect, and permanently installable solution for pH measurement in aqueous media is required. The Pg13.5 screw head makes the sensor particularly suitable for installation situations where a secure and fixed mounting is needed. The pre-mounted 2 meter fixed cable with BNC connector enables direct connection to compatible measurement systems and eliminates the need for additional accessories. Advantages of the JUMO BlackLine electrode A major advantage of this version is the combination of a fixed protective cage, fixed cable, and salt bridge. The protective cage helps protect the sensitive sensor area from mechanical stress during daily operation. This is especially beneficial in applications where the electrode is permanently installed but may be exposed to more demanding conditions in use. The fixed cable with BNC connector also makes this version particularly convenient for users who prefer a ready-to-use solution. Technical data The integrated salt bridge is particularly useful when measuring in low-ion media or in applications with higher flow rates. In such cases, it can help extend the service life of the electrode. This makes this version especially suitable for users who are not only looking for a standard sensor, but for a pH electrode that performs reliably even under more demanding conditions. For pH measurement, the electrode is equipped with proven JUMO UW glass and is designed for a measuring range of pH 0 to 12, with short-term operation up to pH 14. The reference system with polymerized KCl gel electrolyte supports stable measurements in general aqueous media. An integrated temperature sensor is not available in this series. Typical applications Drinking water monitoring Water treatment Swimming pools, aquatics Greenhouse technology Lightly contaminated utility, process, and wastewater Also suitable for rainwater, pond, and surface water Not recommended for: Electroplating water treatment Industrial process and wastewater Ultrapure water Therapeutic baths Biotech and sterilization processes Why buy this electrode? If you are looking for a robust and ready-to-use pH electrode for aqueous media, this BlackLine version is a strong choice. The fixed cable with BNC connection reduces the need for additional accessories, the protective cage safeguards the sensor during operation, and the salt bridge provides a clear advantage in low-ion media or applications with higher flow rates.
The JUMO BlackLine is particularly well suited for applications where direct cable connection, a protected sensor design, and longer service life under more demanding measurement conditions are required. JUMO BlackLine pH plastic shaft electrode with salt bridge, 2 meter fixed cable, BNC connector and fixed protective cage (Type 201005/65-18-45-2000-76-120/837; Part No. 00417300) This version of the JUMO BlackLine pH electrode is especially suitable when a ready-to-connect and robust solution for pH measurement in aqueous media is required. Thanks to its permanently attached 2-meter cable with BNC connector, the sensor can be directly integrated into compatible measurement systems without the need for an additional separate connection cable. This reduces installation effort and is particularly convenient when a simple, ready-to-use connection is required. Advantages of the BlackLine electrode Another advantage is the permanently integrated protective cage. It protects the sensitive sensor area during daily operation and makes this electrode especially suitable for applications where the sensor is handled frequently or used in more demanding environments. This makes it a good choice for users who require not only accurate measurement but also a more robust design. For pH measurement, the electrode is equipped with proven JUMO UW glass and covers a range from pH 0 to 12, with short-term operation up to pH 14. The reference system with polymerized KCl gel electrolyte is suitable for many general water applications. In addition, this version includes a salt bridge. This is particularly advantageous in low-ion media or at higher flow rates, as it can extend the electrode’s service life. In such applications, this version offers clear benefits compared to standard models without a salt bridge. The fixed cable also provides clear advantages in daily use: it is integrated, includes kink protection, and is especially practical for use in humid environments. Anyone looking for a pH electrode that is quick to connect, robust in design, and reliable even under more demanding conditions will find this BlackLine version a strong choice. Typical applications Drinking water monitoring and water treatment Swimming pools, aquatics, greenhouse technology Lightly contaminated utility, process, and wastewater Also suitable for rainwater, pond, and surface water Not recommended for: Electroplating water treatment Industrial process and wastewater Ultrapure water Therapeutic baths Biotech and sterilization processes Why to buy The electrode is delivered ready to connect, including the 2 m fixed cable and BNC connector. The integrated protective cage improves sensor protection in everyday use. The salt bridge helps extend service life in low-ion media or at higher flow rates. This makes it a practical and immediately usable solution.
With an S8 Pg13.5 screw head and a 120 mm insertion length, the electrode can be integrated into many common measurement tasks. It is used across a wide range of applications such as drinking water monitoring or swimming pools. JUMO ecoLine Redox plastic shaft electrode with S8 Pg13.5 screw head and attachable protective cage (201010/53-22-22-0000-00-120/000; Part No. 00357020) The JUMO ecoLine Redox plastic shaft electrode is designed for reliable redox measurements in general aqueous media and offers a cost-effective solution for many standard applications. Thanks to its PEI plastic shaft and attachable protective cage, this version is particularly suitable for practical use with portable measuring devices or wherever additional sensor protection is required in everyday operation. For redox measurement, a robust platinum tip is used, which ensures stable measurement values and is easy to clean. The electrode is complemented by a proven reference system with a polymerized KCl gel electrolyte, which is well suited for general water applications. The JUMO cartridge reference system helps keep the electrolyte free of silver ions throughout its service life, making it less susceptible to certain electrode poisons. Typical applications Drinking water monitoring and water treatment Swimming pools, aquatics, greenhouse technology Lightly contaminated utility, process, and wastewater Also suitable for rainwater, pond, and surface water Environmental applications Beverage and food industry Not recommended for: Electroplating water treatment Industrial process and wastewater Ultrapure water Therapeutic baths Biotech and sterilization processes
2-electrode principleproven versions for industrial use measuring ranges 0 ... 1 mS/cm (K = 0.1) or 0.01 ... 15 mS/cm (K = 1.0) temperature range up to 55 °C, maximum pressure up to 6 bar at 25 °C JUMO ecoLine CR-PVC conductive 2-electrode conductivity sensorBrief description: Conductivity sensors of the 202923 series are used, for example, in general water technology, cooling and air-conditioning systems, drinking and bathing water, or in industrial rinsing and process water circuits. The body material PVC limits the application to medium temperatures up to 55 °C. Two versions with cell constants K = 0.1 or 1.0 are available. Versions with the common thread sizes G 3/4" or G 1" or a plug-in version are available for installation. The plug-in version is used, for example, with the matching PVC tees in nominal sizes DN 25, 32 and 40 and allows the sensor to be quickly dismantled for cleaning or maintenance. The electrical connection is made either via a detachable device plug or via a fixed cable connection. The overall construction and the parts in contact with the medium are physiologically harmless. The electrode material is stainless steel (K = 0.1) or special graphite (K = 1.0). The optionally integrable temperature sensor allows simultaneous recording of the medium temperature for temperature compensation in downstream measuring amplifiers.Stainless steel variant K = 0.1 The sensor has 3 metallic pin electrodes. The two outer pins are electrically connected and form one pole of the 2-electrode conductivity sensor. The counter electrode is the middle stainless steel pin. This design achieves very high measurement precision with low stray fields. A temperature sensor can be integrated in the middle pin. Graphite variant K = 1.0 For physical reasons, special graphite is used as the electrode material for higher conductance values. The two graphite electrodes are completely integrated in the electrode shaft. The optional temperature sensor is located in a stainless steel sleeve that is immersed in the measured medium. Operating principleThe sensors of the 202923 series are 2-electrode conductivity sensors. An AC voltage is applied to them by the transmitter. The current flowing across the liquid and the electrodes is determined by the conductivity of the liquid
2-electrode principleproven versions for industrial use measuring ranges 0 ... 1 mS/cm (K = 0.1) or 0.01 ... 15 mS/cm (K = 1.0) temperature range up to 55 °C, maximum pressure up to 6 bar at 25 °C JUMO ecoLine CR-PVC conductive 2-electrode conductivity sensorBrief description: Conductivity sensors of the 202923 series are used, for example, in general water technology, cooling and air-conditioning systems, drinking and bathing water, or in industrial rinsing and process water circuits. The body material PVC limits the application to medium temperatures up to 55 °C. Two versions with cell constants K = 0.1 or 1.0 are available. Versions with the common thread sizes G 3/4" or G 1" or a plug-in version are available for installation. The plug-in version is used, for example, with the matching PVC tees in nominal sizes DN 25, 32 and 40 and allows the sensor to be quickly dismantled for cleaning or maintenance. The electrical connection is made either via a detachable device plug or via a fixed cable connection. The overall construction and the parts in contact with the medium are physiologically harmless. The electrode material is stainless steel (K = 0.1) or special graphite (K = 1.0). The optionally integrable temperature sensor allows simultaneous recording of the medium temperature for temperature compensation in downstream measuring amplifiers.Stainless steel variant K = 0.1 The sensor has 3 metallic pin electrodes. The two outer pins are electrically connected and form one pole of the 2-electrode conductivity sensor. The counter electrode is the middle stainless steel pin. This design achieves very high measurement precision with low stray fields. A temperature sensor can be integrated in the middle pin. Graphite variant K = 1.0 For physical reasons, special graphite is used as the electrode material for higher conductance values. The two graphite electrodes are completely integrated in the electrode shaft. The optional temperature sensor is located in a stainless steel sleeve that is immersed in the measured medium. Operating principleThe sensors of the 202923 series are 2-electrode conductivity sensors. An AC voltage is applied to them by the transmitter. The current flowing across the liquid and the electrodes is determined by the conductivity of the liquid