In everyday life, the question is rarely asked, "What is conductivity?"
With the introduction of the SI system of units, "electrical conductivity" became the standard formal term, but in practice the word "conductivity" alone is often used.
Since conductivity is an indicator of how easily current flows through a solution, it depends on the amount of ions and their mobility in that solution.
Conductivity is a measure of how easily electricity can flow. In water, it is the ions that carry the current from one to another. That is, the more Na+ and Cl- there are in the water, the more current is carried, and the higher the conductivity. So if we know the conductivity of a salt water sample, we can calculate how salty the water is. (This is done when converting the salinity to get the value displayed by the Twin conductivity meter).
In summary, the following can be stated: Conductivity is a measure of the ability of a solution to conduct electric current. It is expressed as microsiemens (micro-Siemens per centimeter or µS/cm) or, in higher conductivity levels, as millisiemens. It is also the reciprocal of resistivity. Some industries, such as water treatment, have adopted a measurement known as TDS (Total Dissolved Solids). The TDS value is approximated to conductivity using a multiple factor and is expressed in parts per million (ppm).
An exemplary measurement of conductivity with a pocket tester can be found in the video link below: Pocket Tester Shop
HORIBA LAQUAtwin Conductivity Meter
The portable 4-in-1 MW306 PRO conductivity/TDS/NaCl (salinity)/temperature meter has won many fans worldwide with its reliable fast and easy operation. It is also very rugged and has IP67 waterproof rating. It has a user-friendly interface for data exchange and as mentioned at the beginning, it is designed to measure four different parameters of water. Ideal for use in hydroponics, horticulture, laboratories, food processing, water treatment and many other applications with demanding measurement requirements.
MW401 is a portable TDS meter with automatic temperature compensation and low range.This meter is designed for aquariums, aquaculture, laboratories and water treatment applications to meet the needs of both hobbyists and professionals.It is also an excellent meter for food labs and water treatment applications.TDS tests provide a method for optimising chemical use and minimising operating costs.In aquariums and aquaculture, high concentrations of total dissolved solids (TDS) can affect water clarity and reduce photosynthesis of aquatic plants.In water treatment, high TDS can affect the clarity and taste of drinking water.The MW401 has a measuring range of 0 to 1990 mg/L (ppm) with a resolution of 10 mg/L (ppm).This meter comes complete with conductivity probe with 1 m (3.3') cable and calibration solution.
MW402 is a high range (TDS) portable conductivity meter with automatic temperature compensation.This meter is designed for aquariums, aquaculture, laboratories and water treatment applications to meet the needs of both hobbyists and professionals.It is also an excellent meter for food labs and water treatment applications.TDS tests provide a method for optimising chemical use and minimising operating costs.In aquariums and aquaculture, high concentrations of total dissolved solids (TDS) can affect water clarity and reduce photosynthesis of aquatic plants.A high TDS value can affect the clarity and taste of drinking water.The MW402 has a measuring range of 0.0 to 10.0 g/L (ppt) with a resolution of 0.1 g/L (ppt).This TDS meter comes complete with conductivity probe with 1 meter (3.3') cable and a calibration solution.
This 3-in-1 low range combination meter allows you to measure pH, EC (conductivity) and TDS with a single meter and probe.It comes complete with the SE600 combined pH/EC/TDS probe, a 20 ml bag of pH 7.01 buffer solution, a 20 ml bag of 1413 µS/cm calibration solution, a 20 ml bag of 1382 ppm calibration solution, a 9 V battery and instructions.
This 3-in-1 combination meter allows you to measure pH, EC high range (conductivity) and TDS high range with a single meter and probe.It comes complete with the SE600 combined pH/EC/TDS probe, a 20 ml bag of pH 7.01 buffer solution, a 20 ml bag of 1413 µS/cm calibration solution, a 20 ml bag of 1500 ppm calibration solution, a 9 V battery and instructions.
Das Milwaukee MW803 ist ein kompaktes, wasserdichtes All-in-One-Messgerät für pH, Leitfähigkeit, TDS und Temperatur. Speziell für Messungen im niedrigen Leitfähigkeitsbereich entwickelt, eignet es sich optimal für Hydroponik, Trinkwasseranalysen und Anwendungen mit geringer Salzkonzentration. Dank automatischer Temperaturkompensation, austauschbarer Sonde und einfacher Handhabung bietet der MW803 höchste Zuverlässigkeit auch im mobilen Einsatz.
Der Milwaukee MW804 kombiniert pH-, Leitfähigkeits-, TDS- und Temperaturmessungen in einem robusten, wasserdichten Gerät. Mit seinem hohen Messbereich ist er besonders für Anwendungen in der Landwirtschaft, oder Aquakultur geeignet. Die automatische Temperaturkompensation und die austauschbare Sonde gewährleisten präzise und langlebige Messungen – auch bei hohen Salz- oder Mineralgehalten.
This MW805 MAX pH/EC/TDS/Temp. 4-in-1 combo meter allows you to measure pH, EC (conductivity), TDS and Temp. with a single meter and one single probe.DESIGN FEATURESpH, conductivity / nutrient EC, TDS (ppt) with automatic temperature compensationSelectable TDS factors from .40 to 0.8; defaulet value 0.50Stability indicator prompting the user when the readings stabilizeDedicated GLP key to store and recall data on system statusA replaceable, Amplified Combination pH/EC/TDS/Temp probe with a single 1 meter cable for easy use (MA852D/1 probe included)A cloth junction on the pH sensor to reduce contamination when measuring fertilizer solutions. Gel filled for long lasting measurmentsA light weight and portable form factor at just 260g with battery and just over 7,62cm wideA large easy to read displayFactory calibration for Temperature and simple, highly accurate, single cell automatic, one point calibration for EC and an automatic up to 5 point calibration for pHIP 67 rated rugged case built for field or lab applicationsSpecialized design for hydroponic, aquaponic, and greenhouse growers
This High Range MW806 MAX pH/EC/TDS/Temp. 4-in-1 combo meter allows you to measure pH, EC (conductivity), TDS and Temp. with a single meter and one single probe.DESIGN FEATURESpH, conductivity / nutrient EC, TDS (ppt) with automatic temperature compensationSelectable TDS factors from 0.40 to 0.8; defaulet value 0.50Stability indicator prompting the user when the readings stabilizeDedicated GLP key to store and recall data on system statusA replaceable, Amplified Combination pH/EC/TDS/Temp probe with a single 1 meter cable for easy use (MA852 probe included)A cloth junction on the pH sensor to reduce contamination when measuring fertilizer solutionsGel filled for long lasting measurmentsA light weight and portable form factor at just 260g with battery and just over 7,62cm wideA large easy to read displayFactory calibration for Temperature and simple, highly accurate, single cell automatic, one point calibration for EC and an automatic up to 5 point calibration for pHIP 67 rated rugged case built for field or lab applicationsSpecialized design for hydroponic, aquaponic, and greenhouse growers
Der Milwaukee T75 Waterproof TDS Pen misst gelöste Feststoffe mit großer Genauigkeit im niedrigen Bereich. Automatische Temperaturkompensation (ATC) sorgt für konsistente Werte – selbst in herausfordernden Umgebungen. Wasserdicht, robust und praxisgerecht – ideal für Anwendung in Aquarien, Wasseraufbereitung oder Labor.
Der Milwaukee T76 Waterproof TDS Pen deckt hohe Konzentrationen gelöster Feststoffe ab – robust, wasserdicht und mit ATC-Technologie für verlässliche Messungen. Dank austauschbarer Sonde besonders langlebig und wartungsfreundlich. Optimal für professionelle Einsatzfelder mit anspruchsvollen Bedingungen.
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
The XS REVIO is a professional portable multi-parameter meter that can be powered in three different ways (battery, PC, AC adapter). It has an illuminated color graphic display for excellent data visualization in all lighting conditions, also thanks to the possibility of automatically and manually adjusting the contrast and illumination of the display. Measurement of pH, mV, ORP, ISE, conductivity, TDS, salinity, resistivity, dissolved oxygen and temperature. Online help with setup and calibration allows easy and immediate use of the instrument. Simultaneous display of multiple parameters that can be selected by the operator. Automatic pH calibration with USA and NIST buffers up to 5 points and 5 user defined points. Automatic ORP calibration 1 point. Automatic conductivity calibration with up to 4 points and 1 user defined point. Adjustable reference temperature and selectable cell constant. Automatic O2 calibration up to two points (0% - 100%). Display of calibrated points with symbols. GLP functions: Date and time, display of calibration data and calibration period setting.Manual and automatic data logger with the possibility of downloading the data to a PC via micro USB.Display of measurement stability and possibility to select 3 stability levels. All processes are constantly monitored and signaled to the operator by the colored LED above the display and by self-diagnostic messages. The following pre-assembled case variants are available for selection: Variant 1: with digital electrode 201 T DHS, cell 2301T and polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable, in compact case (manufacturer's number: 50110952). Variant 2: with pH electrode 201T/3MT , 2301T cell (conductivity), polarographic oxygen sensor, built-in temperature sensor and 3 m fixed cable each, in compact case (manufacturer's number: 50110912)Variant 3: complete with pH electrode 201T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m, in compact case (manufacturer number: 50110922) Variant 4: complete with conductivity cell 2301T/3MT and polarographic sensor DO7/3MT, both with built-in temperature sensor and fixed cable 3m. Additionally S7-BNC cable and NT55 temperature sensor, each 3m cable, in compact case (manufacturer number: 50110942) Variant 5: with S7-BNC cable and NT55 temperature sensor, both 3m cable, in compact case (manufacturer number: 50110932)
IP Protection: IP67 Manufacturer article number: 50014153
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 solutions matching the tester in the form of the 25ml sachets or 70ml bottles find space in the matching foam blank. Your analysis case consists of the following components: 1x pocket tester 1x conductivity calibration solution EC 12880 μS/cm (25ml bag or 70ml bottle) 1x conductivity calibration solution EC 1413 μS/cm (25ml bag or 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
IP Protection: IP67Manufacturer article number: 50014163
IP Protection: IP67 With exchangeable probe Manufacturer article number: 50014203
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 solutions matching the tester in the form of the 25ml sachets or 70ml bottles find space in the matching foam blank. Your analysis case consists of the following components: 1x pocket tester 1x conductivity calibration solution EC 12880 μS/cm (25ml bag or 70ml bottle) 1x conductivity calibration solution EC 1413 μS/cm (25ml bag or 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
IP Protection: IP67 With exchangeable probe Manufacturer article number: 50014213
The XS Instruments Cond 7 Vio and 70 Vio multi-parameter hand-held 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 combined portable conductivity, total dissolved solids and temperature meter of the Vio series has an automatic, up to five-point, conductivity calibration for the most common conductivity calibration standards. 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 measuring electrode, as well as our respective buffer solutions and the instructions. Complementary advantages of the 70 Vio 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 Manufacturer article number: 50110412
The XS Instruments Cond 7 Vio and 70 Vio multi-parameter hand-held 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 combined portable conductivity, total dissolved solids, salinity (70 Vio only) and temperature meter of the Vio series has an automatic, up to five-point, conductivity calibration for the most common conductivity calibration standards. 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 measuring electrode, as well as our respective buffer solutions and the instructions. Complementary advantages of the 70 Vio 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 Manufacturer article number: 50110512