Ammonium (NH4+) ion-selective electrode for 300 seriesThe new electrode is suitable for the LAQUA WQ-300 series from Horiba and offers precise and reliable measurements for ions in aqueous solutions. It is characterized by its user-friendly handling and environmentally friendly design and is versatile in useFeatures:Measurement parameters: Ammonium solid-state electrodes that do not require refillingDouble junction made of porous sintered polyethyleneIntegrated temperature sensorEnvironmentally friendly design made from bio-based plasticSupplied with calibration and ionic strength adjustment solutionsRobust housing made of polycarbonate and PVCLow maintenance, simply rinse and seal Waterproof according to IP67Linearity in the measuring range:The range in which the calibration curve shows linearity is called the measuring range. If a lower concentration is measured at which the linearity is not given, the calibration must be carried out at two points in the lower concentration range.Influence of the pH value:The ammonia electrode can be used in a pH range from 5 to 8. The influence of the pH value can cause a decrease in the slope of the ion-selective electrode or a parallel shift of the calibration curve. To avoid these effects, set the pH value to a suitable value in advance and keep it constant. Interfering ions:Ion-selective electrodes have good selectivity with respect to the ions being measured, but can react to other ions. When using the ion electrode method, it is important to be aware of the effects of coexisting ions and to take measures to avoid them. Interfering ions can form compounds with poor solubility or form complex salts with the structural material of the ion-selective membrane, which can significantly affect the measured value.Conditioning:An electrode is conditioned by immersing it in a standard solution for 1 hour or longer. Use a standard solution with a concentration of 100 mg/L or more. In the following cases, the electrode must be conditioned before calibration. Before first use. Before use after storage for 2 weeks or longer. When the electrode is less sensitive.Calibration:Always calibrate with at least 2 calibration solutions that are a decade apart and include the expected reading. Use fresh calibration solutions and do not reuse them.- Below 10 ppm (mg/L)First solution between 1 and 10 ppmSecond solution between 10 and 50 ppm- Between 10 and 100 ppm (mg/L)First solution between 10 and 100 ppmSecond solution between 100 and 1000 ppm- Over 100 ppm (mg/L)First solution between 100 and 1000 ppmSecond solution above 1000 ppmFurther information can be found in the download area of the store. Manufacturer article number: 3200986783 (300-NH4-C)

To accurately calibrate and maintain the HORIBA LAQUAtwin Pocket Testers, HORIBA provides a special selection of buffer, calibration and standard solutions. A convenient pack size of 6 x 14 ml of these solutions meets the requirements of the pocket testers as only a few drops are needed for calibration. This specific pack size helps to reduce waste and optimize efficiency during regular calibrations. The solutions available cover a variety of measurement ranges, allowing users to select the appropriate solution to suit their individual analysis or measurement needs: - pH buffer solutions: Solutions with pH values of 4.01 or 7.00 are available to calibrate the pH measurement. With these buffers it is possible to precisely regulate and control the pH measurement function of the LAQUAtwin Pocket Tester.- Conductivity standard solutions: 1413 μS/cm standard solutions ensure that the conductivity measurement of your devices is carried out precisely.- NaCl standard solutions: 0.5% or 5.0% NaCl solutions are available for the calibration of salinity measurement.- Ion standard solutions: HORIBA provides standard solutions to calibrate ion selective measurements. HORIBA provides standard solutions for sodium, potassium, nitrate and calcium, available in different concentrations: from low (e.g. 150 ppm) to high concentrations (e.g. 5000 ppm).- Fluoride ion standard solutions: For the calibration of fluoride measurements, HORIBA offers standard solutions with concentrations of 1 ppm and 10 ppm.- TISAB solution: A special solution for use with fluoride ion standard solutions to adjust the ionic strength of the sample for precise fluoride measurements.- ORP standard solution: For the calibration of redox measurements (ORP), HORIBA offers a solution with a redox potential of 225 mV. With these special solutions, the HORIBA LAQUAtwin pocket testers always provide accurate and reliable measurement results. The integrity of their measurement data and the lifetime of their devices can be ensured by regular calibration with these specifically formulated solutions. It is of great importance to select the appropriate calibration solution and standard solution to maintain the accuracy of measurements and ensure the reliability of water quality measurements in various applications. Manufacturer Part No. 3200053514

To accurately calibrate and maintain the HORIBA LAQUAtwin Pocket Testers, HORIBA provides a special selection of buffer, calibration and standard solutions. A convenient pack size of 6 x 14 ml of these solutions meets the requirements of the pocket testers as only a few drops are needed for calibration. This specific pack size helps to reduce waste and optimize efficiency during regular calibrations. The solutions available cover a variety of measurement ranges, allowing users to select the appropriate solution to suit their individual analysis or measurement needs: - pH buffer solutions: Solutions with pH values of 4.01 or 7.00 are available to calibrate the pH measurement. With these buffers it is possible to precisely regulate and control the pH measurement function of the LAQUAtwin Pocket Tester.- Conductivity standard solutions: 1413 μS/cm standard solutions ensure that the conductivity measurement of your devices is carried out precisely.- NaCl standard solutions: 0.5% or 5.0% NaCl solutions are available for the calibration of salinity measurement.- Ion standard solutions: HORIBA provides standard solutions to calibrate ion selective measurements. HORIBA provides standard solutions for sodium, potassium, nitrate and calcium, available in different concentrations: from low (e.g. 150 ppm) to high concentrations (e.g. 5000 ppm).- Fluoride ion standard solutions: For the calibration of fluoride measurements, HORIBA offers standard solutions with concentrations of 1 ppm and 10 ppm.- TISAB solution: A special solution for use with fluoride ion standard solutions to adjust the ionic strength of the sample for precise fluoride measurements.- ORP standard solution: For the calibration of redox measurements (ORP), HORIBA offers a solution with a redox potential of 225 mV. With these special solutions, the HORIBA LAQUAtwin pocket testers always provide accurate and reliable measurement results. The integrity of their measurement data and the lifetime of their devices can be ensured by regular calibration with these specifically formulated solutions. It is of great importance to select the appropriate calibration solution and standard solution to maintain the accuracy of measurements and ensure the reliability of water quality measurements in various applications. Manufacturer Part No. 3200053535

Manufacturer's number: 3014081712For water with low conductivity (e.g. deionized, distilled)Glass housing, platinum/platinum black, k=1, conductivity measuring cell with integrated temperature sensor Waterproof

Manufacturer's number: 3014081714For water with high conductivity  Glass body, platinum/platinum black, k=10, conductivity measuring cell with integrated temperature sensor Waterproof

Manufacturer number: 3014082592For column chromatography with a very small sample quantityGlass body, platinum/platinum black, k=10, conductivity measuring cell

Mobile Analysis Laboratory for Ion Measurements – Versatile Use Compact kit for simultaneous determination of multiple water and environmental parameters The Horiba 4M LAQUAtwin Kit is a mobile laboratory that allows you to determine important ion parameters directly on-site. The case contains pocket testers for measuring sodium, potassium, nitrate, and calcium, as well as for temperature measurement. Each device uses ion-selective electrodes for targeted analysis of small samples and provides fast, reliable results. In addition to the four measurement devices, the kit includes calibration solutions and a wash/spray bottle for sensor cleaning. The sensors can be stored dry without special storage solutions. Compact Multi-Parameter Kit for Flexible On-Site Analyses The set is designed for measurement tasks where multiple ions need to be detected simultaneously, for example when monitoring drinking and process water, performing environmental checks of water bodies, conducting aquaculture analyses, or agricultural research. Thanks to the case, all essential testers including accessories are always on hand and ready for immediate use. The measurement results are available in a short time and are reliable and reproducible – ideal for routine and control measurements in the field. All components are neatly arranged in the case and ready for use at any time. An additional advantage is that the sensors can be stored dry without special storage solutions. Due to its compact design, the kit is particularly suitable for mobile applications where multiple ion parameters need to be determined quickly one after the other or in parallel. Why Multi-Parameter Ion Measurements Are Useful – and a Mobile Kit Is Ideal In many applications, not just a single measurement is important, but the interaction of multiple ion parameters. Sodium, potassium, nitrate, and calcium together influence water quality, biological processes, plant growth, and technical operations. Single measurements in a laboratory are often time-consuming and inflexible. A mobile analysis kit allows simultaneous detection of multiple parameters directly on-site. This allows relationships to be recognized more quickly, decisions to be made more reliably, and measurement campaigns to be carried out more efficiently. The Horiba 4M LAQUAtwin Kit combines these advantages in a compact, user-friendly system. Additional information We would like to inform you of an upcoming product update for the LAQUAtwin handheld analysers. To enhance product safety and prevent infants and young children from accidentally swallowing the batteries, HORIBA will be introducing a new battery cover on all LAQUAtwin pocket-sized analysers. Overview of the product change Change: Battery cover for enhanced safety. Reason: To prevent accidental swallowing of batteries. Production date: From January 2026 in Japan Deliveries to EMEA distribution partners: From March 2026 As this change is currently being rolled out, mixed deliveries of the current and updated versions may occur during the transition period. Frequently asked questions How long is the warranty period for HORIBA pocket testers? The warranty period is two years from delivery for commercial customers. How many measurements can be taken before the sensor needs to be replaced? This varies depending on the application, use and storage of the Horiba tester. As a rule, the sensor should be replaced after one year. How long is the warranty period for replacement sensors for pocket testers? The warranty period is 12 months after delivery for commercial customers. How do you clean the pocket tester? The pocket tester can be rinsed under water. We recommend cleaning with DI water (deionised). Tissue paper is recommended for drying after cleaning. How can the pocket tester be reset to factory settings? (e.g. in the event of an incorrect measurement result) This information can be found in the operating instructions. These can be found in the download area of the shop and on the product. Is calibration necessary before each measurement? Basically, yes. Further information can be found in the operating instructions.

Manufacturer's number.: 3200698386Ion selective electrodes respond to the concentration of specific ions in the test liquid and are variable potential electrodes. They are used in combination with reference electrodes to measure the concentration of certain ions.When measuring with an ion meter, the ion concentration can be read directly by calibrating with different standard solutions. Since the volume reading changes with temperature, the measurements must be taken at a fixed temperature.

Manufacturer number: 3014081107This refillable pH electrode can measure samples in very slender test tubes (e.g., NMR test tubes) due to its long, thin, glass-body.Waterproof

Manufacturer number: 3014080850This glass electrode with conical tip and integrated temperature sensor is designed for pH measurement in food.

Manufacturer number: 3014079136This glass-body, refillable pH electrode with temperature sensor has a sleeve junction for improved stability and repeatability. Ideal for highly accurate pH measurement.

Manufacturer's number: 3200697407 Ion-selective electrodes respond to the concentration of specific ions in the test fluid and are variable potential electrodes. They are used in combination with reference electrodes to measure the concentration of certain ions. When measuring with an ion meter, the ion concentration can be read directly by calibrating with different standard solutions. Since the volume reading changes with temperature, measurements must be taken at a fixed temperature. Note: Chloride sensor, if selected, is supplied without chloride ion strength regulator and chloride electrode filling solution. This must be procured by the customer. Without the filling solution the sensor can´t be used.

Manufacturer's number: 3200693774 Ion-selective electrodes respond to the concentration of specific ions in the test fluid and are variable potential electrodes. They are used in combination with reference electrodes to measure the concentration of certain ions. When measuring with an ion meter, the ion concentration can be read directly by calibrating with different standard solutions. Since the volume reading changes with temperature, the measurements must be taken at a fixed temperature.

Manufacturer's number: 3200697408 Ion-selective electrodes respond to the concentration of specific ions in the test fluid and are variable potential electrodes. They are used in combination with reference electrodes to measure the concentration of certain ions.  When measuring with an ion meter, the ion concentration can be read directly by calibrating with different standard solutions. Since the volume reading changes with temperature, the measurements must be taken at a fixed temperature.

Manufacturer's Number: 3200697409 Ion-selective electrodes respond to the concentration of specific ions in the test fluid and are variable potential electrodes. They are used in combination with reference electrodes to measure the concentration of certain ions. When measuring with an ion meter, the ion concentration can be read directly by calibrating with different standard solutions. Since the volume reading changes with temperature, measurements must be taken at a fixed temperature.

Manufacturer's number: 3200697410 Ion-selective electrodes respond to the concentration of specific ions in the test fluid and are variable potential electrodes. They are used in conjunction with reference electrodes to measure the concentration of certain ions. When measuring with an ion meter, the ion concentration can be read directly by calibrating with different standard solutions. Since the volume reading changes with temperature, measurements must be taken at a fixed temperature.

Manufacturer's number: 3200697411Chloride (Cl-) replacement electrode tip for 6560S-10C

Manufacturer's number: 3200693606Fluoride (Fl-) replacement electrode tip for 6561S-10C

Manufacturer's Number: 3200697412 Nitrate (NO3-) replacement electrode tip for 6581S-10C

Manufacturer's Number: 3200697413Potassium (K+) replacement electrode tip for 6582S-10C

Manufacturer's number: 3200697414Calcium (Ca2+) replacement electrode tip for 6583S-10C

Manufacturer number: 3014046710The flat platinum sensor at the tip allows measurement of samples with small volumeWaterproofCombined electrode

Manufacturer number: 3200922105The flat platinum sensor at the tip allows measurement of samples with small volumeWaterproofNot refillableCombined electrode

Manufacturer's number: 3014046709For general use Plastic housing, titanium/platinum black, k=1, conductivity cell with integrated temperature sensorWaterproofunder water measurements up to a depth of 1 meter