HORIBA Conductivity & TDS Sensors – Precise Detection of Dissolved Substances
Sensor technology for the direct determination of dissolved ions and total dissolved solids in water
Conductivity sensors measure the ability of a medium to conduct electrical current – and thus indirectly the amount of dissolved ions in water. In this category you will find HORIBA sensors for the precise detection of conductivity and TDS (Total Dissolved Solids).
Reliable measurement technology for determining concentrations in water and processes
The conductivity sensors support continuous monitoring of dissolved substances in a wide range of applications. They provide stable and reproducible measurement values and enable quick assessment of changes in the system.
Thanks to robust designs and adapted measuring cells, the sensors are suitable for both laboratory applications and industrial processes.
How does a conductivity sensor work?
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Measurement via electrical conductivity
Dissolved ions in water enable the flow of current.
The higher the concentration, the higher the conductivity. -
Conversion into TDS values
The TDS value can be calculated from conductivity.
This describes the total amount of dissolved substances. -
Influence of temperature and medium
Conductivity is temperature-dependent.
Suitable sensors take these factors into account for accurate results.
Typical application areas
- Control of ion load in water treatment systems
- Monitoring of process and cooling water
- Laboratory analysis for determining dissolved substances
- Environmental analysis and water monitoring
Your benefits
- Reliable detection of dissolved substances and concentrations
- Robust designs for various applications
- Stable and reproducible measurement results
Reliably monitor the composition of your water and keep track of dissolved substance concentrations at all times.
Filter products
Manufacturer's number: 3014081712For water with low conductivity (e.g. deionized, distilled)Glass housing, platinum/platinum black, k=1, conductivity measuring cell with integrated temperature sensor Waterproof
Manufacturer's number: 3014081714For water with high conductivity Glass body, platinum/platinum black, k=10, conductivity measuring cell with integrated temperature sensor Waterproof
Manufacturer number: 3014082592For column chromatography with a very small sample quantityGlass body, platinum/platinum black, k=10, conductivity measuring cell
Manufacturer's number: 3014046709For general use Plastic housing, titanium/platinum black, k=1, conductivity cell with integrated temperature sensorWaterproofunder water measurements up to a depth of 1 meter
300-2C2C, 2-cell conductivity sensor cartridge, stainless steel, K=0.1 0.01 to 500µS/cm to 2000 mS/cmManufacturer article number: 3200820579
300-4C-C, 4 cell conductivity sensor cartridge, epoxy, carbon body, 10µS/cm to 2000 mS/cmManufacturer article number: 3200780928
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