Benchtop Conductivity Test Analyzer
GLP-compliant benchtop conductivity analyzer measuring conductivity, TDS, salinity, and resistivity from 0.5 μS/cm to 200 mS/cm with automatic temperature compensation and data storage.
Louise Corscadden, PhD
Neuroscience · ConductScience
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The Benchtop Conductivity Test Analyzer provides precise measurement of electrical conductivity, total dissolved solids (TDS), salinity, and resistivity across a wide range from 0.5 μS/cm to 200 mS/cm. This GLP-compliant instrument features automatic temperature compensation from 0-50°C and supports multiple electrode constants (0.1 to 100 cm⁻¹) for diverse analytical requirements. The analyzer incorporates advanced conductivity measurement technology with one-point calibration capability using a K=1 electrode.
Designed for laboratory and field applications, the instrument offers three measurement modes: stable display, time measurement, and continuous measurement. Data storage capabilities capture measurement values, temperature, calibration status, and timestamps for comprehensive record-keeping. The IP54-rated housing provides dustproof and waterproof protection with sealed connector caps, while RS-232 output enables data transfer to external systems.
How It Works
Electrical conductivity measurement relies on the principle that dissolved ions in aqueous solutions conduct electrical current. When an alternating voltage is applied across electrodes immersed in the sample, ions migrate toward electrodes of opposite charge, creating a measurable current flow. The instrument measures this current and calculates conductivity based on Ohm's law, where conductivity equals current divided by voltage and normalized by the electrode geometry (cell constant).
The analyzer employs a four-electrode measurement system to minimize polarization effects and electrode fouling. Two outer electrodes apply the excitation voltage while two inner electrodes measure the resulting potential difference. This configuration ensures accurate readings across the full measurement range. Automatic temperature compensation corrects conductivity values to a reference temperature (18°C, 20°C, or 25°C) using built-in algorithms, as ionic mobility increases approximately 2% per degree Celsius.
The instrument converts conductivity measurements to related parameters using established relationships: TDS calculation applies conversion factors based on solution type, salinity determination uses specific algorithms for seawater or other electrolyte systems, and resistivity represents the reciprocal of conductivity. Multiple electrode constants accommodate different sample types, from pure water (requiring high cell constants) to concentrated solutions (requiring low cell constants).
Features & Benefits
Conductivity
- Measuring range
Temp. compensation range
- (0 ~ 50)â (automatic )
Electrode constant
- 0.1 / 0.5 / 1 / 5 / 10 / 50 / 100 cm-1
Reference temperature
- 25â,20â and 18â
Other Technical Parameters
- Data storage
Storage content
- Measuring value series number, measuring value,temperature, ATC or MTC state, measuring date and time
Communication connector
- 160 Ã 190 Ã 70mm/ 880g
Size and weight
- ISO9001:2015, CE and CMC
Working Condition
- Environment temperature
Environmental humidity
- ⤠75%
IP rating
- IP54 Dustproof and waterproof
Automation Level
- semi-automated
Brand
- ConductScience
Accuracy
- 5~ 60â range: ± 0.4â other range: ± 0.8â
Temperature Range
- Measuring range
Power/Voltage
- RS232
Research Domain
- Analytical Chemistry
- Environmental Monitoring
- Food Science
- Industrial Hygiene
- Materials Science
- Pharmaceutical QC
Weight
- 0.99 kg
Dimensions
- L: 7.48 mm
- W: 6.3 mm
- H: 2.76 mm
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Measurement Range | 0.5 μS/cm to 200 mS/cm in single instrument | Many basic models cover narrower ranges requiring multiple instruments | Eliminates need for multiple conductivity meters across different concentration ranges |
| Temperature Compensation | Automatic compensation from 0-50°C with selectable reference temperatures | Entry-level models often provide manual compensation only | Reduces measurement errors and improves reproducibility in temperature-variable environments |
| Electrode Compatibility | Seven electrode constants (0.1 to 100 cm⁻¹) supported | Basic instruments typically support 1-2 electrode types | Provides flexibility for diverse sample types without requiring separate analyzers |
| Data Management | Comprehensive storage with timestamps, calibration status, and RS-232 output | Simpler models often lack data logging capabilities | Supports GLP compliance and integration with laboratory information systems |
| Multi-Parameter Display | Simultaneous conductivity, TDS, salinity, and resistivity calculations | Basic meters typically display conductivity only | Eliminates manual calculations and provides immediate access to multiple water quality parameters |
| Environmental Protection | IP54 rating with sealed connectors | Standard laboratory instruments often lack moisture protection | Enables use in humid environments and provides protection against accidental spills |
This conductivity analyzer combines wide measurement range, comprehensive temperature compensation, and multi-parameter capabilities in a GLP-compliant benchtop format. The instrument's support for multiple electrode constants and data management features addresses diverse analytical requirements from water quality testing to pharmaceutical applications.
Practical Tips
Calibrate daily using fresh standard solutions stored at room temperature, and verify calibration with a second standard at different concentration.
Why: Temperature and evaporation affect standard solution conductivity, impacting measurement accuracy.
Store electrode in appropriate storage solution when not in use and replace storage solution monthly to prevent crystal formation.
Why: Dry storage can damage the electrode surface while old storage solution may contaminate subsequent measurements.
Allow samples to equilibrate to room temperature and minimize air bubbles on electrode surfaces during measurement.
Why: Temperature gradients and trapped air can create measurement artifacts and reduce repeatability.
If readings drift or appear unstable, check electrode connections and clean electrode surface with mild detergent solution.
Why: Loose connections or surface contamination are common causes of measurement instability.
Perform regular checks with certified reference materials and document calibration history for traceability.
Why: Reference material verification ensures measurement accuracy and supports quality assurance requirements.
Ensure proper grounding of the instrument and avoid measuring solutions with high voltage potential.
Why: Electrical safety is critical when working with conductive solutions and sensitive electronic measurement systems.
Rinse electrode thoroughly with distilled water between samples and pat dry with lint-free tissue.
Why: Cross-contamination between samples can significantly affect conductivity measurements, especially at low concentrations.
Select the reference temperature that matches your typical sample analysis conditions for most accurate results.
Why: Consistent reference temperature selection minimizes temperature compensation errors in routine analysis.
Setup Guide
What’s in the Box
- Benchtop conductivity analyzer main unit
- Conductivity electrode with integrated ATC sensor
- Power adapter with regional plug
- RS-232 communication cable (typical)
- Calibration certificate (typical)
- User manual and quick start guide (typical)
- Conductivity calibration solution (typical)
- Protective electrode storage solution (typical)
Warranty
ConductScience provides a comprehensive 1-year manufacturer warranty covering parts and labor, with technical support for calibration procedures and troubleshooting assistance.
Compliance
References
Background reading relevant to this product:
What calibration solutions are recommended for different measurement ranges?
For the 0.5-200 mS/cm range, use standard KCl solutions: 84 μS/cm for low range, 1413 μS/cm for mid-range, and 12.88 mS/cm for high conductivity measurements. The instrument supports one-point calibration across the full range using a K=1 electrode.
How does temperature compensation affect measurement accuracy?
Automatic temperature compensation corrects for the ~2%/°C change in ionic mobility. The system operates from 0-50°C with three reference temperatures (18°C, 20°C, 25°C). Manual temperature coefficient adjustment may be needed for non-standard electrolyte systems.
Which electrode constant should I select for my application?
Use higher constants (10-100 cm⁻¹) for low conductivity samples like pure water, and lower constants (0.1-1 cm⁻¹) for high conductivity solutions. The K=1 electrode provides optimal performance across the full 0.5 μS/cm to 200 mS/cm range.
Can the instrument store measurement data for GLP compliance?
Yes, the data storage system captures measurement values, temperature, ATC/MTC status, measurement date, and time stamps. Data can be exported via RS-232 interface for integration with LIMS systems and regulatory documentation.
What maintenance is required for the conductivity electrode?
Rinse electrode with distilled water between measurements, store in appropriate storage solution when not in use, and perform regular calibration checks. The electrode may require periodic cleaning with mild acid solution to remove mineral deposits.
How does this compare to portable conductivity meters?
Benchtop design provides superior temperature stability, larger display, comprehensive data logging, and multiple electrode constant options compared to handheld units. The stable platform eliminates measurement errors from probe movement during readings.
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