Horiba Conductivity & TDS Pocket Testers – Measurement Solutions for Determining Dissolved Substances

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.

The high-quality multi-parameter hand-held meters of the LAQUA 200 series manufactured by Horiba are suitable for use in the field under any conditions and in direct daylight thanks to their monochrome LCD display with LED backlight. Another advantage of these devices is that the hand-held meters are very shock and scratch resistant due to the special rubber coating and offer a long operating time due to the AA 2500 mAh batteries used. An IP67 certification, which certifies dust-tightness and protection against temporary submersion for up to 30 minutes at a water depth of one metre, rounds off the professional overall package in addition to the ergonomic design and simple operation. In the certainty of producing high-quality devices, the manufacturer Horiba offers you a three-year guarantee on the hand-held measuring devices of the LAQUA 200 series. During the measurements, the user is supported by the display of instructions in the form of smiley symbols. This is intended to prevent operating errors that can lead to implausible measurement results. Furthermore, the measuring device has only 9 keys and no menu texts. This design decision serves, among other things, to ensure that the device can be operated as easily as possible during discontinuous use or when used by other users.  The Horiba meters have an electrode wear indicator, a lock function to "save" the current measured value on the display, automatic calibration functions and a self-diagnostic function. The fold-out stand on the back of the units means that you always have your hands free to carry out your measurements easily and safely. Instruments marked as "Kit" are delivered in a reinforced measuring case for mobile use in the open air. This contains the exchangeable measuring electrode, the corresponding cable which is connected to the device and the electrode, as well as the suitable buffer or calibration solutions including instructions. If you want to carry out measurements of different parameters with different electrodes, you can simply connect the electrodes to each other at the upper part and then immerse them in the measuring solution.  EC220 kit version with GLP functions Measurement data storage of 1000, instead of 500 data sets Measurement and calibration data are stored GLP compliant with date and time stamp PC communication via optional USB cable RS232 printer function to print the measurement data Scope of delivery:Hand-held meter EC210 or EC2209383-10D Ti/Pt Conductivity electrode (k=1.0)one each of 84 µS/cm, 1413 µS/cm, 12.88 mS/cm and 111.8 mS/cm conductivity calibration solution (60 ml) 2x AA batteryrugged measuring case manual and quick reference guideManufacturer article number:  3200779528 (EC210-K) 3200779529 (EC220-K)

The high-quality multi-parameter hand-held meters of the LAQUA 200 series manufactured by Horiba are suitable for use in the field under any conditions and in direct daylight thanks to their monochrome LCD display with LED backlight. Another advantage of these devices is that the hand-held meters are very shock and scratch resistant due to the special rubber coating and offer a long operating time due to the AA 2500 mAh batteries used. An IP67 certification, which certifies dust-tightness and protection against temporary submersion for up to 30 minutes at a water depth of one metre, rounds off the professional overall package in addition to the ergonomic design and simple operation. In the certainty of producing high-quality devices, the manufacturer Horiba offers you a three-year guarantee on the hand-held measuring devices of the LAQUA 200 series. During the measurements, the user is supported by the display of instructions in the form of smiley symbols. This is intended to prevent operating errors that can lead to implausible measurement results. Furthermore, the measuring device has only 9 keys and no menu texts. This design decision serves, among other things, to ensure that the device can be operated as easily as possible during discontinuous use or when used by other users.  The Horiba meters have an electrode wear indicator, a lock function to "save" the current measured value on the display, automatic calibration functions and a self-diagnostic function. The fold-out stand on the back of the units means that you always have your hands free to carry out your measurements easily and safely. Instruments marked as "Kit" are delivered in a reinforced measuring case for mobile use in the open air. This contains the exchangeable measuring electrode, the corresponding cable which is connected to the device and the electrode, as well as the suitable buffer or calibration solutions including instructions. If you want to carry out measurements of different parameters with different electrodes, you can simply connect the electrodes to each other at the upper part and then immerse them in the measuring solution.  EC220 kit version with GLP functions Measurement data storage of 1000, instead of 500 data sets Measurement and calibration data are stored GLP compliant with date and time stamp PC communication via optional USB cable RS232 printer function to print the measurement data Scope of delivery:Hand-held meter EC210 or EC2209383-10D Ti/Pt Conductivity electrode (k=1.0)one each of 84 µS/cm, 1413 µS/cm, 12.88 mS/cm and 111.8 mS/cm conductivity calibration solution (60 ml) 2x AA batteryrugged measuring case manual and quick reference guideManufacturer article number:  3200779528 (EC210-K) 3200779529 (EC220-K)

Thank you for your interest in our smart and customizable Horiba WQ-300 series instruments.The high-quality digital multi-parameter handheld meters with their generous color LCD display with LED backlight (7 cm x 5.2 cm) are ideally suited for use in the field under all conditions and in direct daylight.Use our configurator to freely select the suitable measuring device of the WQ-300 Horiba series (1 to 3 channels), the measuring parameters (sensor cartridges) and desired cable length (with integrated sensor receptacle + digital module) according to your wishes and requirements. At a later stage, you can always connect another available measurement parameter to the device via the corresponding sensor cable or carry it in the case as a supplement. As with other handheld measuring devices from Horiba, a major advantage of these devices is that the measuring devices are highly resistant to shock, slipping and scratching thanks to a special rubber coating. Only four standard AA 2500 mAh batteries are required for operation, and to give you more flexibility when you are on the move, the WQ-300 series devices can also be powered by a powerbank or battery pack via the integrated USB interface. The IP67 certification, which certifies dustproofness and protection against temporary submersion for up to 30 minutes at a water depth of one meter, completes the overall professional package, along with the usual ergonomic design and ease of user operation.  Horiba attests to its outstanding product quality by offering a three-year warranty on the LAQUA WQ-300 series handheld meters. Other added values and features:During analyses, the user is supported by the display of operating instructions in the form of smiley icons, which is supplemented by an LED status display on the sensor. This is intended to prevent operating errors, which can lead to implausible measurement results. The design decision to install only a small number of control buttons and not to implement any nested user menus serves to ensure that the devices can be operated easily and safely even during discontinuous use as well as when used by other users.  The measuring instruments have an electrode wear indicator, a measuring stability indicator on the instrument and sensor, a locking function to "save" the currently measured value on the display, free naming of the measuring point (8 characters), automatic calibration functions, integrated sensor holders, self-diagnosis function, as well as GLP functions. The fold-out stand on the back of the instruments means that you always have your hands free to carry out your measurements easily and safely. Measurement data can be conveniently transferred to your computer or cell phone via USB or WiFi.All handheld meters of the 300 series are delivered in a reinforced measuring case for mobile use in the open air. This provides space for the meter, for electrodes and cables, for up to eight 60 ml bottles of buffer solutions including an integrated buffer solution bottle holder for easier calibration. Particularly noteworthy is the automatic sensor recognition of the instrument through the use of sensor cables with integrated digital sensor recording. Information about the sensor, calibration data as well as measurement settings are stored in the sensor recording and transmitted to the measuring instrument. In addition, calibration of all connected sensors is possible at the same time, since each sensor head independently stores the measurement and calibration data and transmits it to the WQ300 series measuring device.Optionally, there is the possibility to connect and use analog sensors via the Horiba BNC sensor adapter with the device, please contact us for this.Languages:GermanEnglishFrenchSpanishPortugueseChineseScope of delivery:WQ-300 series handheld meter in a carrying casethe digital electrode you have chosen, if applicable, and the corresponding sensor-specific cable with integrated digital sensor receptaclemanualManufacturer article number single measuring device WQ-310-K 1 channel: 3200832605 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. Why We Use These Measuring Devices in Water Treatment Precise calcium control is a key element of efficient water treatment – from drinking water purification and process water management to environmental analysis. Elevated calcium levels can lead to scaling, pipe damage, energy losses, and disruptions in chemical processes. For this purpose, we offer tailored high-end solutions from the Horiba LAQUA WQ Series (WQ310-K, WQ320-K, WQ330-K) in our online shop, specifically designed to meet the needs of water technology:  WQ310-K: Single-parameter solution for targeted measurements • WQ320-K: Simultaneous monitoring of, for example, calcium and conductivity • WQ330-K: Three-channel measurement for complex real-time multi-parameter analyses Why We Rely on These Devices: • They provide reliable data for controlling and optimizing water treatment systems • They offer digital evaluation, documented results, and interfaces for process integration • They are robust, packaged in a practical analysis case, and thus also suitable for mobile on-site use • They allow calcium to be measured in combination with other parameters such as pH, conductivity, or redox – for a holistic and efficient approach

Thank you for your interest in our smart and customizable Horiba WQ-300 series instruments.The high-quality digital multi-parameter handheld meters with their generous color LCD display with LED backlight (7 cm x 5.2 cm) are ideally suited for use in the field under all conditions and in direct daylight.Use our configurator to freely select the suitable measuring device of the WQ-300 Horiba series (1 to 3 channels), the measuring parameters (sensor cartridges) and desired cable length (with integrated sensor receptacle + digital module) according to your wishes and requirements. At a later stage, you can always connect another available measurement parameter to the device via the corresponding sensor cable or carry it in the case as a supplement. As with other handheld measuring devices from Horiba, a major advantage of these devices is that the measuring devices are highly resistant to shock, slipping and scratching thanks to a special rubber coating. Only four standard AA 2500 mAh batteries are required for operation, and to give you more flexibility when you are on the move, the WQ-300 series devices can also be powered by a powerbank or battery pack via the integrated USB interface. The IP67 certification, which certifies dustproofness and protection against temporary submersion for up to 30 minutes at a water depth of one meter, completes the overall professional package, along with the usual ergonomic design and ease of user operation.  Horiba attests to its outstanding product quality by offering a three-year warranty on the LAQUA WQ-300 series handheld meters. Other added values and features:During analyses, the user is supported by the display of operating instructions in the form of smiley icons, which is supplemented by an LED status display on the sensor. This is intended to prevent operating errors, which can lead to implausible measurement results. The design decision to install only a small number of control buttons and not to implement any nested user menus serves to ensure that the devices can be operated easily and safely even during discontinuous use as well as when used by other users.  The measuring instruments have an electrode wear indicator, a measuring stability indicator on the instrument and sensor, a locking function to "save" the currently measured value on the display, free naming of the measuring point (8 characters), automatic calibration functions, integrated sensor holders, self-diagnosis function, as well as GLP functions. The fold-out stand on the back of the instruments means that you always have your hands free to carry out your measurements easily and safely. Measurement data can be conveniently transferred to your computer or cell phone via USB or WiFi.All handheld meters of the 300 series are delivered in a reinforced measuring case for mobile use in the open air. This provides space for the meter, for electrodes and cables, for up to eight 60 ml bottles of buffer solutions including an integrated buffer solution bottle holder for easier calibration. Particularly noteworthy is the automatic sensor recognition of the instrument through the use of sensor cables with integrated digital sensor recording. Information about the sensor, calibration data as well as measurement settings are stored in the sensor recording and transmitted to the measuring instrument. In addition, calibration of all connected sensors is possible at the same time, since each sensor head independently stores the measurement and calibration data and transmits it to the WQ300 series measuring device.Optionally, there is the possibility to connect and use analog sensors via the Horiba BNC sensor adapter with the device, please contact us for this.Languages:GermanEnglishFrenchSpanishPortugueseChineseScope of delivery:WQ-300 series handheld meter in a carrying casethe digital electrode you have chosen, if applicable, and the corresponding sensor-specific cable with integrated digital sensor receptaclemanualManufacturer article number single measuring device WQ-320-K 2 channel: 3200832606 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.

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. 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.

Horiba LAQUAtwin 4EC-11 Conductivity Tester – Successor model to the EC-11 Horiba LAQUAtwin Conductivity Tester with 3 calibration points (4EC-11) Find out more about the accuracy of the new successor models to the HORIBA pocket conductivity testers: Your ideal choice for precise conductivity measurements. Manufactured in Japan, the 4EC-11, 4EC-22 and 4EC-33 models represent the highest quality among pocket testers. They offer numerous benefits for users in laboratories, industry, aquaculture, water treatment, schools and universities, as well as for amateur gardeners. An overview of the new HORIBA Pocket Conductivity Tester series: Model 4EC-11: Water resistance, the ability to analyse very small samples from 0.12 ml, 3 calibration points and a conductivity measurement range of up to 19.9 mS/cm are the key features of these instruments. They are easy to operate and maintain, ensuring long-term reliability. Model 4EC-22: In addition to the features of the Model 4EC-11, this model offers a temperature display, four calibration points and an extended conductivity measurement range of up to 199.9 mS/cm. This instrument is ideal for demanding applications where the medium temperature must be recorded for detailed analysis. Model 4EC-33: With the widest measurement range, the ability to measure TDS and additional functions, this model sets new standards. It is designed for professionals who need to carry out highly precise measurements under varying conditions. Applications and benefits for the user: ‘Immersion’: Direct measurement is possible in solutions. For example, you can immerse the tester in a beaker and determine the value. ‘Scoop’: The hinged lid, which acts as a scoop here, allows you to easily take a sample from a hard-to-reach area. ‘Drops’: Efficient analysis of the smallest volumes. Thanks to their user-friendliness, durability and ‘Made in Japan’ quality, HORIBA pocket conductivity testers are a reliable solution for a wide range of measurement applications. LAQUAtwin 4EC-11: The pocket-sized conductivity meter This is the only pocket-sized meter that measures conductivity directly in a 0.12 ml sample. You do not need a beaker to calibrate the meter or measure a sample. Simply place a few drops of the standard solution or sample directly onto the sensor. This method saves time and prevents the wastage of your valuable sample. Your mobile laboratory – for on-site use: Ideal for water quality testing in aquariums, food, beekeeping (honey) and many other applications HORIBAs unique compact meter integrates the electrode, display and sample vessel to enable simple, effective on-site testing through direct measurement with a single drop. Product features: Minimum sample volume: 0.12 ml Up to 3 calibration points Automatic range selection Automatic calibration Automatic standard recognition: 84 μS/cm, 1413 μS/cm and 12.88 mS/cm Automatic temperature compensation: 2 %/°C fixed Automatic stability/hold function Automatic switch-off (30 minutes) Low battery indicator Waterproof and dustproof to IP67 Replaceable sensor 400-hour battery life: continuous operation without backlight Materials: ABS epoxy housing and titanium-coated carbon sensor Display: custom (monochrome) LCD with backlight Operating conditions: 5 to 40 °C, 85% or less relative humidity Warranty: 2 years – meter, 6 months – sensor Packaged in a handy box Supplied with 1413 µS/cm and 12.88 mS/cm conductivity standards (14 ml each), conditioning solution (4 ml), dropper, manual and quick start guides. Manufacturer's item number: 3201077522 Note: How can I tell if I have an old or new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for older models.

Horiba LAQUAtwin 4EC-22 Conductivity Tester – Successor model to the EC-22 Horiba LAQUAtwin Conductivity Tester with 4 calibration points (4EC-22) Find out more about the accuracy of the new successor models to the HORIBA pocket conductivity testers: Your ideal choice for precise conductivity measurements. Manufactured in Japan, the 4EC-11, 4EC-22 and 4EC-33 models represent the highest quality among pocket testers. They offer numerous benefits for users in laboratories, industry, aquaculture, water treatment, schools and universities, as well as for amateur gardeners. An overview of the new HORIBA Pocket Conductivity Tester series: Model 4EC-11: Water resistance, the ability to analyse very small samples from 0.12 ml, 3 calibration points and a conductivity measurement range of up to 19.9 mS/cm are the key features of these instruments. They are easy to operate and maintain, ensuring long-term reliability. Model 4EC-22: In addition to the features of the Model 4EC-11, this model offers a temperature display, four calibration points and an extended conductivity measurement range of up to 199.9 mS/cm. This instrument is ideal for demanding applications where the medium temperature must be recorded for detailed analysis. Model 4EC-33: With the widest measurement range, the ability to measure TDS and additional functions, this model sets new standards. It is designed for professionals who need to carry out highly precise measurements under varying conditions. Applications and benefits for the user: ‘Immersion’: Direct measurement is possible in solutions. For example, you can immerse the tester in a beaker and determine the value. ‘Scoop’: The hinged lid, which acts as a scoop here, allows you to easily take a sample from a hard-to-reach area. ‘Drops’: Efficient analysis of the smallest volumes. Thanks to their user-friendliness, durability and ‘Made in Japan’ quality, HORIBA pocket conductivity testers are a reliable solution for a wide range of measurement applications. LAQUAtwin 4EC-22: The pocket-sized conductivity meter This is the only pocket-sized meter that measures conductivity directly in a 0.12 ml sample. You do not need a beaker to calibrate the meter or measure a sample. Simply place a few drops of the standard solution or sample directly onto the sensor. This method saves time and prevents the wastage of your valuable sample. Your pocket-sized laboratory – practical for on-site use: Ideal for water quality testing in aquariums, food, beekeeping (honey) and many other applications HORIBA’s unique and compact meter combines an electrode, display and sample vessel. This enables simple and effective measurements to be taken directly on site, as the measurement is performed using just a single drop. Product features: Minimum sample volume: 0.12 ml Up to 4 calibration points Display of conductivity and temperature (0 °C to 50.0 °C) Automatic range selection Automatic calibration Automatic standard recognition: 84 μS/cm, 1413 μS/cm, 12.88 mS/cm & 111.8 mS/cm Automatic temperature compensation: 2 %/°C fixed setting Temperature range: 5 to 40.0 °C Automatic stabilisation / automatic data storage Automatic switch-off (30 mins) Low battery indicator Protection class IP67, waterproof and dustproof Replaceable sensor 400 hours battery life: continuous operation without backlight Material: ABS-epoxy resin housing & carbon sensor Display: special (monochrome) LCD with backlight Operating conditions: 5 to 40 °C, 85% relative humidity or less Warranty: 2 years – meter, 6 months – sensor Packaged in a practical plastic box Contents: Conductivity standards 1413 µS/cm and 12.88 mS/cm (14 ml each), conditioning solution (4 ml), dropper, user manual and quick start guide Manufacturer's item number: 3201077523 Note: How can I tell if I have an old or new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for older models.

Horiba LAQUAtwin 4EC-33 Conductivity Tester – Successor model to the EC-33 Horiba LAQUAtwin Conductivity Tester with 4 calibration points (4EC-33) Find out more about the accuracy of the new successor models to the HORIBA pocket conductivity testers: Your ideal choice for precise conductivity measurements. Manufactured in Japan, the 4EC-11, 4EC-22 and 4EC-33 models represent the highest quality among pocket testers. They offer numerous benefits for users in laboratories, industry, aquaculture, water treatment, schools and universities, as well as for amateur gardeners. An overview of the new HORIBA Pocket Conductivity Tester series: Model 4EC-11: Water resistance, the ability to analyse very small samples from 0.12 ml, 3 calibration points and a conductivity measurement range of up to 19.9 mS/cm are the key features of these instruments. They are easy to operate and maintain, ensuring long-term reliability. Model 4EC-22: In addition to the features of the Model 4EC-11, this model offers a temperature display, four calibration points and an extended conductivity measurement range of up to 199.9 mS/cm. This instrument is ideal for demanding applications where the medium temperature must be recorded for detailed analysis. Model 4EC-33: With the widest measurement range, the ability to measure TDS and additional functions, this model sets new standards. It is designed for professionals who need to carry out highly precise measurements under varying conditions. Applications and benefits for the user: ‘Immersion’: Direct measurement is possible in solutions. For example, you can immerse the tester in a beaker and determine the value. ‘Scoop’: The hinged lid, which acts as a scoop here, allows you to easily take a sample from a hard-to-reach area. ‘Drops’: Efficient analysis of the smallest volumes. Thanks to their user-friendliness, durability and ‘Made in Japan’ quality, HORIBA pocket conductivity testers are a reliable solution for a wide range of measurement applications. LAQUAtwin 4EC-33: The pocket-sized conductivity and TDS meter The only portable meter that measures conductivity and total dissolved solids (TDS) directly in a 0.12 ml sample. You do not need a beaker to calibrate your meter or measure a sample. Simply place a few drops of the standard solution or sample onto the sensor. This method saves you time and prevents the wastage of your valuable sample. Your pocket-sized laboratory – practical for on-site use: Ideal for water quality testing in aquariums, food, beekeeping (honey) and many other applications HORIBA’s unique and compact meter combines an electrode, display and sample chamber. This enables simple and effective measurements directly on site, as the measurement is taken with just a single drop. Product features: Minimum sample volume: 0.12 ml Up to 4 calibration points Display of conductivity, TDS and temperature (0 °C to 50.0 °C) Automatic range selection Automatic calibration Automatic standard recognition: 84 μS/cm, 1413 μS/cm, 12.88 mS/cm and 111.8 mS/cm Automatic temperature compensation: 2 %/°C fixed Temperature setting: 5 to 40.0 °C 4 curves for total dissolved solids: TDS factor, adjustable from 0.4 to 1.0 (default is 0.5), EN 27888, 442, NaCl Automatic stabilisation/hold function Automatic switch-off (30 mins) Low battery indicator IP67 protection rating, waterproof and dustproof Replaceable sensor 400 hours battery life: continuous operation without backlight Material: ABS-epoxy resin housing & carbon sensor Display: special (monochrome) LCD with backlight Operating conditions: 5 to 40 °C, 85% relative humidity or less Warranty: 2 years – meter, 6 months – sensor Packaged in a handy carrying case Contents: Conductivity standards 1413 µS/cm and 12.88 mS/cm (14 ml each), conditioning solution (4 ml), dropper, user manual and quick start guide Manufacturer's item number: 3201077524 Note: How can I tell if I have an old or new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for older models.

Find out more about the accuracy of HORIBA’s pocket conductivity testers: your ideal choice for precise conductivity measurements. The EC-11, EC-22 and EC-33 models, manufactured in Japan, represent the pinnacle of quality in pocket testers. They offer numerous benefits for users in laboratories, industry, aquaculture, water treatment, schools and universities, as well as amateur gardeners. An overview of the HORIBA Conductivity Pocket Tester series: Model EC-11: Water resistance, micro-sample analysis from 0.12 ml and a conductivity measurement range of up to 19.99 mS/cm are the key features of these instruments. They are straightforward to use and maintain, ensuring long-term reliability. Model EC-22: Offers a larger temperature display and a wider measurement range. Perfect for advanced applications where the temperature of the medium must be determined for detailed analysis. Model EC-33: With the widest measurement range, TDS measurement capability and advanced features, this model sets new standards. For professionals who need to carry out the most precise measurements under varying conditions. Applications and benefits for the user: ‘Immersion’: Direct measurement is possible in solutions. For example, you can immerse the tester in a beaker and determine the value. ‘Scoop’: The hinged lid, which acts as a scoop here, allows you to easily take a sample from a hard-to-reach area. ‘Drops’: Efficient analysis of the smallest volumes. Thanks to their user-friendliness, durability and ‘Made in Japan’ quality, HORIBA pocket conductivity testers are a reliable solution for a variety of measurement applications. Manufacturer’s item number: 3999960126 LAQUAtwin EC-22: The world’s first pocket-sized conductivity meter Your mobile laboratory – for on-site use: Ideal for water quality testing in aquariums, foodstuffs and many other applications. HORIBAs unique compact analyser integrates the electrode, display and sample chamber to enable simple, effective on-site testing through direct measurement using a single drop. Minimum sample volume: 0.12 ml Up to 3 calibration points Conductivity and temperature display Automatic range Automatic calibration Automatic standard recognition: 1413 µS/cm, 12.88 mS/cm, 111.8 mS/cm Automatic temperature compensation: 2%/°C fixed Temperature calibration: 5 to 40.0 °C Automatic stabilisation / automatic hold measurement Automatic switch-off: 30 mins Low battery indicator IP67 rating: dust and water resistant Replaceable sensor 400-hour battery life: continuous operation without backlight Materials: ABS-epoxy housing and titanium coating with platinum-black sensor Display: custom (monochrome) LCD with backlight Operating conditions: 5 to 40°C, 85% or less relative humidity Warranty: 2 years – meter, 6 months – sensor Packaged in a handy carrying case Supplied with 1413 µS/cm & 12.88 mS/cm conductivity standards (14 ml each), conditioning solution (4 ml), 2 x CR2032 batteries, dropper, instructions and quick start guide Additional information We would like to inform you of an upcoming product update for the LAQUAtwin pocket-sized analysers. To enhance product safety and prevent accidental swallowing of the batteries by infants and young children, HORIBA will be introducing a new battery cover on all LAQUAtwin pocket-sized analysers. Overview of the product change Change: Battery cover for increased 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, you may receive mixed deliveries of the current and updated versions during the transition period. Please note: The EC4 replacement sensors, both old and new, are not compatible with each other. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device variants. How can you tell if you have an older or a new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for the older models.

Find out more about the accuracy of HORIBA’s pocket conductivity testers: your ideal choice for precise conductivity measurements. The EC-11, EC-22 and EC-33 models, manufactured in Japan, represent the pinnacle of quality in pocket testers. They offer numerous benefits for users in laboratories, industry, aquaculture, water treatment, schools and universities, as well as amateur gardeners. An overview of the HORIBA Conductivity Pocket Tester series: Model EC-11: Water resistance, micro-sample analysis from 0.12 ml and a conductivity measurement range of up to 19.99 mS/cm are the key features of these instruments. They are straightforward to use and maintain, ensuring long-term reliability. Model EC-22: Offers a larger temperature display and a wider measurement range. Perfect for advanced applications where the temperature of the medium must be determined for detailed analysis. Model EC-33: With the widest measurement range, TDS measurement capability and advanced features, this model sets new standards. Designed for professionals who need to take the most precise measurements under varying conditions. Applications and benefits for the user: ‘Immersion’: Direct measurement is possible in solutions. For example, you can immerse the tester in a beaker and determine the value. ‘Scoop’: The hinged lid, which acts as a scoop here, allows you to easily take a sample from a hard-to-reach area. ‘Drops’: Efficient analysis of the smallest volumes. Thanks to their user-friendliness, durability and ‘Made in Japan’ quality, HORIBA pocket conductivity testers are a reliable solution for various measurement applications. Manufacturer’s item number: 3999960127 LAQUAtwin EC-33: The world’s first pocket-sized conductivity meter Your mobile laboratory – for on-site use: Ideal for water quality testing in aquariums, foodstuffs and many other applications. HORIBAs unique compact meter integrates the electrode, display and sample chamber to enable simple, effective on-site testing through direct measurement using a single drop. Minimum sample volume: 0.12 ml Up to 3 calibration points Conductivity, TDS and temperature display Automatic range Automatic calibration Automatic standard recognition: 1413 µS/cm, 12.88 mS/cm, 111.8 mS/cm Automatic temperature compensation: 2%/°C fixed Temperature calibration: 5 to 40.0 °C 4 curves for total dissolved solids: TDS factor 0.4 to 1.0, EN 27888, 442, NaCl Automatic stable / automatic hold measurement Automatic switch-off: 30 mins Low battery indicator IP67 rating: dust and waterproof Replaceable sensor 400-hour battery life: continuous operation without backlight Materials: ABS-epoxy housing and titanium coating with platinum-black sensor Display: custom (monochrome) LCD with backlight Operating conditions: 5 to 40°C, 85% or less relative humidity Warranty: 2 years – meter, 6 months – sensor Packaged in a practical carrying case Supplied with 1413 µS/cm & 12.88 mS/cm conductivity standards (14 ml each), conditioning solution (4 ml), 2 x CR2032 batteries, dropper, instructions and quick start guide Horiba LAQUAtwin – Portable precision for water treatment The compact Horiba LAQUAtwin pocket testers offer a fast, precise and straightforward solution for on-site measurement of key water parameters – directly from a single drop. In the HeylNeomeris shop, you will find selected models for professional use in water treatment, environmental analysis, aquaculture or everyday laboratory work. Why LAQUAtwin devices are ideal for water treatment: Measurement directly from a drop – only 0.05 ml sample volume required Fast results – ideal for mobile checks and spot analyses Accurate results – laboratory quality despite compact design Easy to use – no prior knowledge required Waterproof housing (IP67) – robust and suitable for outdoor use Applications in water treatment: Rapid tests in drinking water analysis or for quality control of process water Regular monitoring of parameters such as pH, conductivity, calcium, sodium or nitrates Interim checks in the laboratory or plant where larger instruments are impractical Ideal for service personnel, field staff or operators of small plants Examples of models available in the HeylNeomeris Shop: Horiba LAQUAtwin pH-11 – for precise pH measurements Horiba LAQUAtwin EC-33 – for conductivity measurement Horiba LAQUAtwin Na-11, Ca-11, NO3-11 – specifically for measuring ions such as sodium, calcium or nitrate Additional information We would like to inform you of an upcoming product update for the LAQUAtwin pocket-sized 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 increased 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 is a change currently being rolled out, mixed deliveries of the current and updated versions may occur during the transition phase. Please note: The EC4 replacement sensors, both old and new, are not compatible with each other. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device variants. How can you tell if you have an older or a new device? If your Pocket Tester is marked ‘4-cell’, you have the latest version of this device. In this case, you will need the replacement sensors listed in the cross-selling section, as well as the standard and conditioning solutions. These have been specially optimised for the new Pocket Testers and are not suitable for the older models.

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164510 (10 Meter = U-51)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164499 (10 Meter = U-52G)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164505 (30 Meter = U-53G)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164503 (30 Meter = U-52)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164507 (10 Meter = U-53)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200158178 (2 Meter = U-53G)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164502 (10 Meter = U-52)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200156563 (2 Meter = U-52G)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164500 (30 Meter = U-52G)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164506 (2 Meter = U-53)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164508 (30 Meter = U-53)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164501 (2 Meter = U-52)

Measure and Display 11 Parameters Simultaneously with Innovative Features, Newly Designed Control Unit and Sensor TechnologyDear customers, we will provide you with the item description in the next few days. You will find the technical data in the form of a table, which will give you a good overview, under the "Specifiactions" tab.  You are also welcome to take a look at the product flyer in the download area, which contains all the important information. Manufacturer article number:3200164509 (2 Meter = U-51)