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.
Horiba LAQUAtwin Conductivity, TDS, Temperature Multiparameter Tester (EC-33)
Article number: 895655
€174.00*
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Available, delivery time: 1-2 days
Article number:
895655
GTIN:
4260682382238
Measurement parameters:
electrical conductivity | TDS value | temperature
Measuring range:
0 to 199 μS/cm | 200 to 1999 μS/cm | 2.00 to 19.99 mS/cm | 20.0 to 199.9 mS/cm | TDS 0.0 to 99.9 ppm, 100 to 999 ppm, 1000 to 9990 ppm | 0 to 50.0 ºC
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Product information "Horiba LAQUAtwin Conductivity, TDS, Temperature Multiparameter Tester (EC-33) "
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:
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.
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:
Direct measurement is possible in solutions. For example, you can immerse the tester in a beaker and determine the value.
The hinged lid, which acts as a scoop here, allows you to easily take a sample from a hard-to-reach area.
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
- 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.
Dimensions
| Height | 3 cm |
|---|---|
| Length | 18,5 cm |
| Width | 10 cm |
Weight
| Weight | 190 g |
|---|
Other attributes
| Applications | Aquaculture and Coral, Aquariums, Beer, Beverages, Environmental, Food, Heating, Horticulture, Hydroponics, Laboratory, Pools, Schools, Water Conditioning, Water Treatment, Wine |
|---|---|
| Brand | Horiba |
| Country of origin | JP |
| Customs tariff number | 90278930 |
| Parameter | Combined Multiparameter, Conductivity and TDS |
| Quality | Advanced |
Downloads:
Technical data
Measurement Principle: 2 Electrode Bipolar AC
Minimum Sample Volume: 0.12 ml
Conductivity Measurement Range / Resolution:
0 to 199 μS/cm (1 μS/cm)
200 to 1999 μS/cm (1 μS/cm)
2.00 to 19.99 mS/cm (0.01 mS/cm)
20.0 to 199.9 mS/cm (0.1 mS/cm)
Accuracy:
± 2% full scale (0 to 19.99 mS/cm)
± 5% full scale (20.0 to 199.9 mS/cm)
Maximum Calibration Points: 3
Calibration Curves: 1413 μS/cm, 12.88 mS/cm, 111.8 mS/cm
TDS Measurement Range / Resolution:
0.0 to 99.9 ppm (0.1 ppm)
100 to 999 ppm (1 ppm)
1000 to 9990 ppm (10 ppm)
Calibration Curves: TDS Factor (0.4 to 1.0) / EN 27888 / 442 / NaCl
Temperature Display / Resolution: 0 to 50.0 ºC (0.1 ºC)
Functions
- Automatic Range
- Automatic Standard Recognition
- Temperature Compensation (2%/ºC fixed)
- Temperature Calibration
- Auto Hold / Auto Stable
- Automatic Power Off (30 mins.)
- Low Battery Indicator
- IP67 Water / Dust Proof
- Replaceable Sensor
Display: Custom (Monochrome) Digital LCD with Backlight
Operating Temperature / Humidity:
5 to 40 ºC, 85% or less in relative humidity (no condensation)
Battery Life: Approx. 400 hrs. continuous use without backlight
Material: ABS epoxy body / Titanium coated with platinum black sensor
Dimensions: 164 x 29 x 20 mm(excluding projections)
Mass: Approx. 50g (including sensor and batteries)
Accessories included
- 1413 μS/cm & 12.88 mS/cm Conductivity Standard Solutions (14 ml each)
- Conditioning Solution (4 ml)
- CR2032 Batteries (2)
- Dropper
- Instruction & Quick Manuals
- Small storage case
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Replacement sensor, calibration standards and accessories
Horiba LAQUAtwin S070 Cond Replacement Sensor for EC-11, EC-22, EC-33 tester
Article number:
895666
The HORIBA LAQUAtwin Pocket Tester series allows water quality parameters to be measured quickly and accurately directly on site. To ensure that these measurements are reliable and accurate, it is essential to check the sensors regularly and replace them with replacement sensors where necessary. These replacement sensors have been specifically developed for the HORIBA LAQUAtwin series and offer a wide range of variants for various measurements: pH, conductivity, salinity, redox (ORP), as well as ion-selective sensors for sodium, potassium, nitrate, calcium and fluoride. Each of these sensors has been developed with the aim of maximising the user-friendliness and accuracy for which HORIBA is renowned worldwide in the field of water quality testing. The advantages of HORIBA replacement sensors are: Easy replacement: The sensors are easy to replace, allowing measurements to resume quickly. Highest accuracy: The replacement sensors ensure that measurement results are precise and reliable. Wide range of measurements: Various types of sensors are available for different water quality parameters. Durability: The sensors are designed to have a long service life, even under challenging conditions. Instructions for sensor replacement: To ensure that your HORIBA LAQUAtwin Pocket Tester remains durable and accurate, please follow these steps when replacing the sensor: Removing the sensor Switch off the meter. Lift the tip of the sensor. Then slide the sensor slightly away from the meter. Remove the sensor completely from the meter (by pulling). Fitting the sensor Switch off the meter. Ensure that the water-resistant seal is clean and undamaged. Press the sensor onto the meter so that the hook ‘A’ on the back of the meter fits into the hole ‘a’ on the sensor tab. Make sure that the waterproof seal is not twisted. Important: To get the measuring device back up and running for accurate measurements, follow the steps in the user manual for the relevant tester after replacing the sensor. (Our products include such manuals. In most cases, calibration and, if necessary, conditioning are required.) Question: How can I check if my sensor is worn out? Answer: By checking the condition of the sensor as follows: To check the sensor condition, perform a 2-point calibration. If a calibration error occurs, this suggests that the sensor is deteriorating. The sensor should therefore be replaced. By carrying out regular checks and replacing sensors in good time, you can ensure the high quality and reliability of your water quality measurements using the HORIBA LAQUAtwin Pocket Testers. Important note on compatibility Please note: The Horiba LAQUAtwin conductivity, TDS and temperature multi-parameter testers, both old and new, are not compatible with one another. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device variants. How can you tell whether you have an older or a newer 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. Manufacturer’s item number: 3200459672
€77.00*
Horiba 1413 μS/cm Conductivity Standard Solution (514-22)
Article number:
895670
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. Important note on compatibility Please note: The Horiba LAQUAtwin conductivity, TDS and temperature multi-parameter testers, both old and new, are not compatible with one another. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device variants. How can you tell whether you have an older or a newer 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. Manufacturer Part No.: 3999960110
€48.00*
Horiba 12.9 mS/cm Conductivity Standard Solution (514-23)
Article number:
895671
The HORIBA 12.9 mS/cm conductivity standard solution is a reliable calibration solution for high-quality LAQUAtwin EC conductivity meters. This standard solution is precisely preset to a conductivity of 12.9 mS/cm, ensuring fast and reliable calibration of your measuring instruments. Areas of application Ideal for regular calibration and quality control in laboratories, environmental analysis and industrial processes, especially in combination with HORIBA LAQUAtwin EC series instruments. Product advantages at a glance Precise and reproducible conductivity of 12.9 mS/cmSuitable for HORIBA LAQUAtwin EC measuring devicesEasy to use: ready to use, preconfiguredBottle size 14 ml: practical and handy Manufacturer item number: 3999960111
€48.00*
Horiba Conditioning Solution for Conductivity and Salt Sensors (514-20)
Article number:
895674
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. Important note regarding compatibility Please note: The replacement sensors, both old and new, are not compatible with one another. Similarly, the conditioning solutions for the old and new versions are not compatible with the respective device models. 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. Manufacturer Part No.: 3999960114
€48.00*
Horiba Crop Press Y049
Article number:
895821
The Horiba Crop Press Y049 is a robust, handy device for easy extraction of plant juice for laboratory and field analyses. Its stable lever mechanism enables efficient extraction of small sample quantities from leaves, stems or other plant parts – quickly, cleanly and without an additional power source. Ideal for use in plant physiology, nutrient analysis and quality control in research, agriculture and environmental monitoring. Manufacturer article number: 3200469679
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