Measure Nitrate in Water – Professional Nitrate Measurement with HORIBA

Horiba WQ330-K – Your Professional 3-Channel Water Quality Meter Expandable multi-parameter system for simultaneous measurement of pH, conductivity, redox, and other water parameters The Horiba LAQUA WQ330-K is a powerful multi-channel device for advanced water analysis, both on-site and in the laboratory. With three freely configurable measurement channels, it can simultaneously record parameters such as pH, conductivity, redox potential, TDS, temperature, oxygen, ammonia, calcium, chloride, nitrate, fluoride, and potassium. Intuitive operation, automatic sensor recognition, and digital calibration ensure accurate, fast, and reproducible measurements. Flexible Multi-Parameter System for Field and Laboratory Applications The analysis kit with the Horiba WQ330-K is ideal for environmental and water body monitoring, research and teaching, as well as drinking and process water control. The large LCD display with LED backlight ensures excellent readability even in direct sunlight. Measurement data can be exported and documented via USB or wirelessly, greatly simplifying traceability and analysis. The modular system allows the device to be quickly and precisely adapted to any measurement task. It is ideal for users who need to efficiently and reliably monitor multiple water parameters. Technical Features and Key Advantages of the WQ330-K The three measurement channels of the Horiba WQ330-K enable simultaneous recording of different water parameters, reducing measurement time and allowing better evaluation of relationships between parameters. The modular sensor concept allows flexible use of digital sensors, which are automatically recognized and store their calibration history. Notably, the combination of high measurement precision, user-friendliness, and mobility makes this device stand out. Quick deployment without complicated setup, along with easy data transfer for documentation and analysis, makes the Horiba LAQUA WQ330-K an ideal solution for professional water analytics. Calibrating the instrument: pH measurement To obtain accurate results, a two-point calibration must be carried out. It is recommended that the following solutions be used: pH 7.00 and 4.01 for acidic samples pH 7.00 and 10.01 for alkaline samples Carry out a three-point calibration using pH 7.00, 4.01 and 10.01 if you do not know the expected pH value of the sample. It is recommended that you calibrate using pH 7.00 first. Conductivity measurement For a conductivity measurement, a single-point calibration is sufficient, for example at 1413 μS/cm. For greater accuracy, a multi-point calibration can also be carried out. Note: During the promotional period, the discount on accessories will be automatically deducted at the shop’s checkout when purchased together with the HORIBA WQ330 device. Frequently asked questions How long is the warranty period for HORIBA analysers? The warranty period is 2 years for the 300 (WQ) series and 1 year for the F series after delivery. Where can I find suitable replacement electrodes or buffer solutions? You can find the appropriate replacement electrodes and buffer solutions in the shop under the main item at the bottom of the cross-selling section. How do I clean the probe before calibration? The sensors should be cleaned with DI water (deionised). After cleaning, wipe them with tissue paper if possible. Frequently asked questions about the promotion How long does the promotion run for? The promotion runs from 1 September 2026 to 31 December 2026. How do I get the discount on the accessories? The discount will be automatically deducted at the shop’s checkout when you purchase the HORIBA WQ330 unit at the same time.

Nitrate (NO3-) 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 characterised by its user-friendly handling and environmentally friendly design and can be used for a wide range of applications.Features:Measurement parameters: Nitrate (NO3-) Solid-state electrodes that do not require refillingDouble junction made of porous sintered polyethyleneIntegrated temperature sensor Environmentally friendly design made from bio-based plasticSupplied with calibration and ionic strength adjustment solutionsRobust housing made of polycarbonate and PVCLow maintenance, simply rinse and sealWaterproof according to IP67Linearity in measurement range:The range where the calibration curve has linearity is called the measurement range. When lower concentration is measured where the linearity is not established, perform calibration at two points in the lower concentration range.Influence of pH:The impact of the pH may cause a decrease in the slope of the ion selective electrode, or parallel shifting of the calibration curve. To prevent these effects, set the pH to an appropriate value in advance and keep it constant.Interfering ions:Ion selective electrodes have good selectivity with respect to the ions to be measured, but they may react to the other ions. When using the ion electrode method, it is important to know the effects of coexistent ions and take measures to avoid them. Interfering ions may form compounds with poor solubility or may form complex salts with the structure material of the ion selective membrane, these may to have a significant impact on the measured value.Conditioning:An electrode is conditioned by soaking it in a standard solution for 1 hour or longer. Use a standard solution whose concentration is 100 mg/L or more.In the following cases, perform conditioning of the electrode before calibration.• Before the first use.• Before use after storage for 2 weeks or longer.• If the electrode is less responsive.Calibration:Always calibrate with at least 2 calibration solutions which are 1 decade apart and bracket the expected measurement value.Use fresh calibration solutions and do not re-use them.• Below 10 ppm (mg/L)First solution between 1 and 10ppmSecond solution between 10 and 50 ppm• Between 10 and 100 ppm (mg/L)First solution between 10 and 100ppmSecond solution between 100 and 1000 ppm• Above 100 ppm (mg/L)First solution between 100 and 1000ppmSecond solution above 1000 ppmFurther information can be found in the data sheets in the download area of the store Manufacturer article number: 3200986784 (300-NO3-C)

Horiba LAQUAtwin Nitrate Ion Tester NO3-11 for Precise On-Site Measurements Handheld tester with 2-point calibration, ideal for water and environmental measurements The Horiba LAQUAtwin Nitrate Ion Tester (NO3-11) is a portable device for direct determination of nitrate ions (NO3) and temperature in liquids and samples. Thanks to the ion-selective electrode and compact design, the tester delivers fast and reliable results. The integrated temperature unit enables temperature-compensated analysis and clearly displays both nitrate and temperature values on the digital LCD display. Mobile Nitrate Ion Tester for Precise On-Site Analyses The integrated temperature measurement enables temperature-compensated analysis and shows both nitrate and temperature values. Only very small sample volumes are required, minimizing sample consumption and increasing efficiency in daily use. The tester can be set up with up to two calibration points, with features such as automatic standard recognition, adjustable calibration values, and multiplication compensation for flexibility. Only minimal sample volumes are needed for each analysis, reducing sample usage and improving efficiency. Why Nitrate Measurement Is Crucial – and a Pocket Tester from Horiba Is Ideal Nitrate measurement plays a central role in agriculture, water management, and environmental monitoring. Elevated nitrate concentrations can affect drinking water quality, stress ecosystems, and contribute to over-fertilization. At the same time, nitrate is an essential nutrient for plants, and targeted control is vital for sustainable agriculture. A mobile nitrate pocket tester enables rapid on-site analysis without time-consuming laboratory tests. This allows early detection of contamination, immediate action, and reliable monitoring of legal limits. The Horiba LAQUAtwin NO3-11 combines this flexibility with high measurement accuracy and easy operation – ideal for routine checks and scientific applications. The tester can be configured with up to two calibration points. Features like automatic standard recognition, adjustable calibration values, and multiplication compensation provide high adaptability to different sample types and measurement conditions. Typical Applications of the Horiba LAQUAtwin Nitrate Ion Tester (NO3-11) Agriculture: To optimize fertilizer use, promote plant growth, and minimize environmental impact, farmers and agronomists use the tester to monitor nitrate levels in soils and irrigation water. Water Quality Management: To maintain nitrate concentrations within safe limits, the NO3-11 is used in water management to check drinking and wastewater quality. Environmental Monitoring: The NO3-11 allows environmental technicians and scientists to quickly analyze nitrate contamination in rivers, lakes, and groundwater, ensuring compliance with environmental standards and identifying pollution sources. Research and Development: The tester is used by scientists in environmental science, hydrology, and soil science to conduct detailed studies of the nitrogen cycle and the effects of nitrates on ecosystems. 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.

The LAQUAtwin Nitrate Ion Handheld Tester (NO3-11C) included in the analysis kit is pre-set by the factory to the relevant calibration points 30PPM and 300PPM for soil analysis. Manufacturer Part No. 3200689164  | B-742 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.

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.