Mobile pH Tester with 3-Point Calibration for On-the-Go Use Horiba LAQUAtwin pH Tester – ideal for water and environmental analysis The Horiba LAQUAtwin pH Tester pH-22 is compact, robust, and designed for mobile use. With up to three calibration points and a measurement range of 0.00 to 14.00 pH, this device delivers high precision and reliability. Direct measurement with just a single drop of sample provides fast results. Features such as automatic buffer recognition, temperature compensation, and Stabil/Hold functionality make daily operation simple and convenient. Mobile precision pH tester for reliable on-site measurements The tester combines electrode, display, and sample container in a dust- and waterproof IP67 housing, making it ideal for field and laboratory applications. The digital backlit display shows pH and mV values clearly and accurately. Automatic shut-off and battery status indicators ensure convenient operation. The package includes calibration buffer solutions (pH 4.01 and 7.00), batteries, a pipette, and a quick-start guide. Why accurate pH measurement is critical – and why a handheld tester is ideal pH is a key parameter in water, environmental, and process analysis because it significantly influences chemical reactions, biological processes, and material stability. Even small deviations can substantially impact water quality, product quality, or process safety. A mobile handheld pH tester allows fast, reliable measurements directly on site. Changes can be detected immediately, and corrective actions implemented without delay. The Horiba LAQUAtwin pH-22 combines this flexibility with high measurement precision, making it ideal for field, laboratory, and routine applications. Typical applications for the Horiba LAQUAtwin pH handheld tester Aquaculture and coral monitoring Beer, beverage, and food production Heating systems Laboratories and schools Environmental analysis Water treatment Horticulture

Manufacturer Part No. 3999960124 LAQUAtwin PH-33: The world's first pocket-sized PH meter Your mobile laboratory - for use on site: Ideal for water quality testing in aquatic, drinking and process water and many other applications. HORIBA's unique compact meter integrates electrode, display and sample container to enable simple, effective on-site testing by direct measurement with a single drop. Minimum sample volume: 0.1 ml (0.05 ml with sampling sheet B) Up to 5 calibration points pH, mV and temperature display Automatic calibration Automatic buffer recognition: USA & NIST pH buffers Automatic temperature compensation Temperature calibration: 5 to 40.0 ºC Automatic stable / automatic hold measurement Automatic switch off: 30 min. Low battery indicator IP67 rating dust and waterproof Replaceable sensor 400 hours battery life: continuous operation without backlight Material: ABS epoxy Display: customised (monochrome) LCD with backlight Operating conditions: 5 to 40°C, 85% or less relative humidity Warranty: 2 years - meter, 6 months - sensor Packed in a practical carrying case Supplied with pH 4.01 & 7.00 buffers (14ml each), 2 x CR2032 batteries, dropper, instructions and quick reference guide

Precise Potassium Ion Measurement on the Go – Mobile, Reliable, and Easy Precise potassium ion measurement with 2-point calibration and integrated temperature display The Horiba K-11 Potassium Pocket Tester was designed to determine potassium in a wide variety of samples with high precision. Thanks to the ion-selective electrode and the digital LCD screen with backlight, the tester is perfect for mobile water quality and environmental analyses. The minimal sample volume of only 0.3 ml (0.05 ml with sampling sheet) ensures reliable results even with small sample sizes. With its 2-point calibration and automatic standard recognition, the device can be flexibly adapted to different measurement conditions. The IP67 rating for dust and water protection, along with a long battery life of up to approximately 400 hours, makes the tester highly reliable for mobile use. Technical Features for Reproducible Potassium Measurements The potassium tester covers a wide measurement range from 4 to 9,900 ppm (mg/L) and additionally displays temperatures up to 50 °C with a resolution of 0.1 °C. The integrated temperature compensation ensures stable results even under changing environmental conditions. Automatic standard recognition, adjustable calibration values, and multiplication compensation guarantee high reproducibility across different sample types. This makes the K-11 suitable for both routine and demanding analytical tasks. Why Potassium Measurement Is Important – Ideal with the Horiba K-11 Hand Tester Potassium is an essential parameter in water, environmental, agricultural, and food analysis. In water bodies, potassium content affects water quality, in soils it is a key nutrient for healthy plant growth, and in food it plays an important role for nutrition and labeling requirements. A mobile potassium hand tester enables rapid on-site analysis without time-consuming laboratory testing. Changes can be detected immediately, and decisions can be made right away. The Horiba K-11 combines this flexibility with high measurement accuracy and ease of use – ideal for fieldwork, routine checks, and scientific studies. Where Can It Be Used? Environmental Monitoring: The K-11 is a fast and precise measurement tool for environmental technicians and scientists monitoring potassium concentrations in water bodies to ensure water quality and identify contamination sources. Agriculture: The K-11 allows farmers and agronomists to measure potassium in soil. This is crucial for fertilizer application and improving plant growth. Easy evaluation of soil extracts enables precise nutrient requirement determination. Food Industry: The tester is used by quality assurance personnel to check potassium content in beverages and food. These measurements are important for product development, health assessments, and compliance with nutritional labeling requirements. Teaching, Research, and Development: By deepening the understanding of potassium’s role in biological and chemical processes, the K-11 serves researchers and educators as a useful tool for experimental studies and educational purposes.

Mobile Sodium Ion Tester from Horiba with Temperature Measurement – precise and robust High-precision sodium ion tester with 2-point calibration – ideal for water and environmental analysis The Horiba LAQUAtwin Na-11 sodium ion tester was specifically designed for accurate measurement of sodium concentrations in a wide range of samples. The device enables direct on-site measurements. Its clear display shows both the Na⁺ concentration and the sample temperature in a single step, making field, laboratory, and greenhouse work significantly more efficient. Mobile sodium ion tester for precise on-site measurements Featuring 2-point calibration and automatic standard recognition (150 and 2000 ppm), the instrument can be easily adapted to different measurement requirements. The integrated temperature display and automatic temperature compensation ensure accurate results even under fluctuating environmental conditions. The robust IP67 housing is dustproof and waterproof, making the tester suitable for demanding daily use. With a battery life of approximately 400 hours, reliable long-term operation is ensured. The tester is supplied with standard solutions, sampling sheets, batteries, and matching pipettes for immediate use. Why sodium measurement matters – and why a handheld tester is the ideal solution Measuring sodium ions plays a crucial role in water, environmental, food, and agricultural analysis. Excessively high or low sodium concentrations can significantly affect water quality, soil structure, plant growth, and the quality of food products and drinking water. Regulatory limits and quality standards further require regular monitoring. A mobile sodium ion handheld tester enables fast and precise analysis directly at the point of use, without time-consuming sampling or laboratory analysis. The Horiba LAQUAtwin Na-11 combines this flexibility with high measurement accuracy and ease of use, making it ideal for routine monitoring, quality control, and research applications. Typical applications for the Horiba sodium ion tester Environmental monitoring: Measurement of sodium concentrations in surface and groundwater to assess water quality and ensure compliance with environmental standards. Food and beverage production: Testing sodium levels in food and beverages for quality assurance, product development, and regulatory compliance. Agriculture: Monitoring sodium content in irrigation water and soils to support plant health and optimize water management. Research & development: Use in laboratories for experimental studies on sodium ion behavior under varying conditions. Education: Utilized in schools and universities to demonstrate the use of ion-selective electrodes in analytical chemistry.

Main features  LCD display  Display of calibration points  Stability display  pH range: -2 ... 16 pH. Resolution 0.01 pH / 1 ... 3 calibration points / 5 stored technical buffers  mV function for testing the pH electrodes  Redox range: -1000 ... + 1000 mV / Redox calibration at a point defined by the user  Conductivity range: 0.01 μS ... 199.9 mS / 1 ... 3 calibration points / 3 stored conductivity buffers  Reference temperature 20/25 °C selectable  Suitable exchange electrode: 880849

Main features  LCD display  Display of calibration points  Stability display  Conductivity range: 0.01 μS ... 199.9 mS / 1 ... 3 calibration points / 3 stored technical buffers.  Integrated temperature sensor  Suitable replacement electrode: 880853

IP Protection: IP67  With exchangeable probe

Main features LCD display Display of calibration points Stability display pH range: -2 ... 16 pH. Resolution 0.01 pH / 1 ... 3 calibration points / 5 stored technical buffers mV function for testing the pH electrodes Conductivity range: 0.01 μS ... 199.9 mS / 1 ... 3 calibration points / 3 stored conductivity buffers Reference temperature 20/25 °C selectable Suitable exchange electrode: 880848

IP Protection: IP67  With exchangeable probe

IP Protection: IP67   With exchangeable probe

IP Protection: IP67  With exchangeable probe

Dear customers, our handy pocket tester analysis case protects your handheld tester safely and also offers you space for the required calibration and buffer solutions. The 25ml sachet or 70ml bottle solutions matching the tester can be accommodated in the foam blank. Your analysis case consists of the following components: 1x pocket tester  1x pH 4.01 buffer solution (25ml bag or 70ml bottle) 1x storage solution (25ml bag or 70ml bottle) 1x 475mV ORP solution in a 70ml bottle 2x batteries 1x lanyard for the pocket tester 1x pack of tissues  You can also purchase the case separately to safely store your existing testers and always have the appropriate calibration and buffer solutions on site in the case. IP protection class: IP67 

Dear customers, our handy pocket tester analysis case protects your handheld tester safely and also offers you space for the required calibration and buffer solutions. The storage solution matching the tester in the 25 ml sachet and the 70ml 475mV redox solution finds place in the foam blank. Your analysis case consists of the following components: 1x pocket tester  1x storage solution (25ml sachet or 70ml bottle)  1x ORP 475mV solution in a 70ml bottle 2x batteries 1x lanyard for the pocket tester 1x pack of tissues  You can also purchase the case separately to safely store your existing testers and always have the appropriate calibration and buffer solutions on site in the case. IP protection class: IP67 

Manufacturer article number: 50014433 (PC 51) Replacement electrode for Neomeris Professional pH/mV/conductivity/TDS/salt/temp. pocket tester with exchangeable comb. probe, IP67. Item no.: 880840

Manufacturer article number: 50014483 (PC 61)Replacement electrode for Neomeris Professional pH/mV/Redox/Conductivity/TDS/Salt/Temp. pocket tester w. exchangeable combined probe, IP67. Item no.: 880838

Manufacturer article number: 50014423 (SPH 51) Replacement electrode for Neomeris Professional pH/mV/Temp. food pocket tester with exchangeable probe, IP67 Article no.: 880841

Manufacturer article number: 50014403 (pH 51) Replacement electrode for Neomeris Professional pH/mV/Temp. pocket tester with exchangeable probe, IP67 Item no.: 880837

Manufacturer article number: 50014463 (pX 41) Replacement electrode for Neomeris Professional pH/Redox/Temp. pocket tester w. exchangeable probe. Item no.: 880844

The practical premium analysis case boiler house contains a complete hand-held laboratory for checking the feed water quality. The professional, combined multi parameter conductivity and pH measuring instrument has two replaceable probes.   Contents: Professional combined conductivity and pH value measuring instrument with exchangeable probes for determining the main parameter conductivity in the range of 0.00 to 200 mS/cm with a resolution of 0.01 - 0.1 - 1 µS / mS (automatic) and the pH value in the range of 0 to 14.00 (Plus Version -2.00 to 16.00) with a resolution / accuracy of 0.1 pH (Plus Version 0.01 / +0.02). In addition, the TDS value and temperature can be displayed and the instrument has an automatic temperature compensation 0-80°C (Plus Version 0 to 100°C). With an additional available ORP probe you can measure the oxidation reduction potential.Duroval A water hardness test set complete with measuring tube, indicator, dosing pipette calibrated 0-30 °dH and 50 ml titration solution for approx. 100 analyses with measuring time: approx. 2 minutesDuroval B water hardness test set complete with measuring tube, indicator, dispensing pipette calibrated 0-2 °dH and 50 ml titration solution for approx. 100 analyses with a measuring time of approx. 2 minutesDuroval CPM test set complete with measuring tube, indicator, dosing pipette calibrated 0-20 °dH carbonate hardness, p-value (acid capacity up to pH 8.2; KS 8.2) and m-value (acid capacity up to pH 4.3; KS 4.3) and 50 ml titration solution for approx. 200 analyses with measuring time: approx. 2 minutesConductivity Calibration Solution EC 12880 μS/cm, +-1% @25°C, 1 bottle a 70ml Buffer solution pH 4.01, +-1% @25°C, 1 bottle a 70mlBuffer solution pH 7.01, +-1% @25°C, 1 bottle a 70mlMeasuring cup 100 ml Black plastic case with red closure Our portable multi-parameter measuring device with innovative high-resolution colour display is suitable for working in all conditions and offers you an integrated user-friendly guide in the form of the set-up and calibration mode. This allows the user to easily and intuitively use the instrument at any time. The meter has automatic pH calibration with USA and NIST buffers with up to three points for pH and one point for ORP. Up to five fixed points, as well as one individual calibration point, are available for calibrating the conductivity electrode. You are supported by an intuitive symbolism on the backlit screen, including the indication of the measurement stability (adjustable) and any errors. Another advantage is that the multi-parameter meter is delivered in our professional measuring case, which contains the selected measuring electrodes, as well as our respective buffer solutions and the instructions. Complementary advantages of the Professional Plus version: GLP functions: Date and time, recall of calibration data and "Calibration due" function Integrated data logger for up to 1000 data, automatic and manual PC connection via USB for evaluation of measurement data (Micro-USB on the instrument side) via Data Link+ software Automatic brightness control of the display (prolongs battery life) Only 6 keys for easy control of all functions of the unit 230V power supply unit

Professional Water Testing Lab for Heating Systems This practical analysis kit contains a complete portable laboratory, specifically designed for checking the fill water of hot water heating systems according to the VDI Guideline 2035. The guideline describes how changes in pH or excessively high electrical conductivity can promote corrosion damage to heating systems and why regular monitoring of these parameters is important. The analysis kit from HeylNeomeris provides everything needed to check the most important chemical parameters of heating water. The supplied solutions and indicators allow on-site determination of pH fluctuations, conductivity deviations, and water quality. What Does the Analysis Kit Include? Electronic conductivity meter with interchangeable probe for measuring conductivity in the range of 0–3999 μS/cm with a resolution of 1 μS/cm and TDS value in the range of 0–2000 PPM with a resolution of 1 PPM. Automatic temperature compensation 0–60°C. IP65. Conductivity calibration solution EC 1413 μS/cm, ±1% @25°C, 5 bags × 20 ml Electronic pH meter with interchangeable probe for measuring pH in the range of 0.0–14.0 with a resolution of 0.1 pH Buffer solution pH 4.01, ±1% @25°C, 5 bags × 20 ml Buffer solution pH 7.01, ±1% @25°C, 5 bags × 20 ml Buffer solution pH 10.01, ±1% @25°C, 5 bags × 20 ml 1 measuring cup 50 ml Duroval A complete with measuring tube, indicator, calibrated dosing pipette 0–30 °dH, and 50 ml titration solution for approx. 100 analyses (measurement time: approx. 2 minutes) Duroval B complete with measuring tube, indicator, calibrated dosing pipette 0–2 °dH, and 50 ml titration solution for approx. 100 analyses (measurement time: approx. 2 minutes) Advantages of the Professional Water Testing Lab for Heating Systems The professional water testing lab for heating systems enables comprehensive and guideline-compliant checking of heating water on-site. By combining electronic measuring devices with proven chemical test methods, all relevant parameters according to VDI Guideline 2035 can be reliably captured. Regular monitoring of pH, electrical conductivity, and water hardness helps detect and prevent corrosion damage, deposits, and malfunctions at an early stage. The analysis kit is ideal for heating engineers, service technicians, and system operators who want to ensure proper commissioning, maintenance, or documentation of water quality.

The practical analysis case contains a complete hand-held laboratory for testing the filling water of heating systems according to VDI guideline 2035. The conductivity meter and pH meter are IP65 certified, which means "dust-tight and protected against water jets" and have replaceable probes.   Contents:   Electronic conductivity meter with exchangeable probe for determining the conductivity in the range 0-3999 μS/cm with a resolution of 1 μS/cm and the TDS value in the range 0-2000PPM with a resolution of 1 PPM. Automatic temperature compensation 0-60°C. IP65!  Conductivity Calibration Solution EC 1413 μS/cm, +-1% @25°C, 5 bags a 20ml Electronic pH meter with exchangeable probe for determining the pH value in the range of 0.0-14.0 with a resolution of 0.1 pH Buffer solution pH 4.01, +-1% @25°C, 5 bags of 20ml Buffer solution pH 7.01, +-1% @25°C, 5 bags of 20ml Buffer solution pH 10.01, +-1% @25°C, 5 bags of 20ml Duroval A complete with measuring tube, indicator, dosing pipette calibrated 0-30 °dH and 50 ml titration solution for approx. 100 analyses with measuring time: approx. 2 minutes. Duroval C complete with measuring tube, indicator, dosing pipette calibrated 0-20 °dH and 50 ml titration solution for approx. 100 analyses with a measuring time of approx. 2 minutes According to VDI Guideline 2035, Sheet 2, changes in the pH value or excessive electrical conductivity (LF) in hot water heating systems should be avoided to prevent corrosion damage to heating systems. With the help of our supplied solutions, indicators and testers, an optimal control and monitoring of the relevant values can take place. The appropriate values for your heating system can be found in the VDI guideline 2035. We regularly carry out team training courses for facility managers and heating installers in the correct application. Please contact us.