TDS Meter
Portable dual-parameter meter measuring TDS (0-9999 ppm) and conductivity (0-9999 μS/cm) with integrated temperature sensing for water quality assessment.
| Model | LH-TDS9 |
| Name | tds water tester |
| Type | Water quality analyzer |
| Measuring range | TDS: 0-9999ppm (mg/L),Conductivity:0-9999us/cm |
| Accessories | 1 TDS meter1 manual |
| Applied range | TDS meter is a easy tool for testing the level of water quality, popular in water deal industry, household, travlling, and etc. |
The ConductScience TDS Meter (Model LH-TDS9) is a dual-parameter water quality analyzer designed for rapid assessment of total dissolved solids (TDS) and electrical conductivity in aqueous samples. This portable instrument measures TDS concentrations from 0-9999 ppm (mg/L) and conductivity from 0-9999 μS/cm, providing quantitative data for water purity evaluation across research and monitoring applications.
The meter incorporates advanced microprocessor technology for measurement processing and includes integrated temperature sensing capabilities (0°C to 80°C range). With dimensions of 164×25×16 mm and weighing 26.5 g, the instrument is suitable for both laboratory bench work and field sampling scenarios where portable water quality assessment is required.
How It Works
The TDS meter operates on the principle that electrical conductivity in aqueous solutions correlates directly with the concentration of dissolved ionic species. The instrument applies a low-voltage AC signal across electrodes immersed in the sample solution and measures the resulting current flow, which increases proportionally with the concentration of dissolved salts, minerals, and other ionizable compounds.
The microprocessor converts the measured conductivity values to TDS readings using a conversion factor that accounts for the average ionic mobility of common dissolved substances. Simultaneously, an integrated temperature sensor monitors sample temperature across the 0°C to 80°C range, allowing for temperature-corrected measurements. The dual-parameter display provides both TDS values in ppm (mg/L) and direct conductivity readings in μS/cm.
Features & Benefits
Model
- LH-TDS9
Name
- tds water tester
Type
- Water quality analyzer
Measuring range
- TDS: 0-9999ppm (mg/L),Conductivity:0-9999us/cm
Accessories
- 1 TDS meter1 manual
Applied range
- TDS meter is a easy tool for testing the level of water quality, popular in water deal industry, household, travlling, and etc.
Usage Situation
- drinking water, water filters, hydroponics, aquariums, food & coffee, pools & spas.
Automation Level
- manual
Brand
- ConductScience
Accuracy
- TDS: ±2%(F.S)
Weight
- 26.5g
Dimensions
- 164mmx25mmx16mm
Temperature Range
- 0°C~80°C,32~176â
Power/Voltage
- 2*1.5V ( AG13 button battery)
Research Domain
- Analytical Chemistry
- Environmental Monitoring
- Food Science
- Industrial Hygiene
- Microbiology
- Pharmaceutical QC
Weight
- 0.06 kg
Dimensions
- L: 6.46 mm
- W: 0.98 mm
- H: 0.63 mm
Comparison Guide
| Feature | This Product | Typical Alternative | Advantage |
|---|---|---|---|
| Measurement Parameters | Dual-parameter measurement (TDS and conductivity) | Entry-level models often measure only TDS or only conductivity | Eliminates the need for separate instruments when both parameters are required for complete water quality assessment. |
| TDS Accuracy | ±2% full scale accuracy | Basic meters may offer lower accuracy specifications | Provides reliable quantitative data suitable for research protocols and quality control procedures. |
| Temperature Range | 0°C to 80°C measurement capability | Limited temperature range in basic models | Accommodates both ambient and elevated temperature measurements without requiring sample cooling. |
| Processing Technology | Advanced microprocessor-based measurements | Analog or basic digital processing | Delivers stable readings and automatic TDS conversion calculations for consistent results. |
| Portability | 26.5g weight with compact 164×25×16mm dimensions | Varies by model design | Enables convenient field sampling and laboratory bench work without space or weight constraints. |
| Power Requirements | Two AG13 button batteries | Various power options including rechargeable systems | Simple battery replacement without requiring charging infrastructure for extended field work. |
The LH-TDS9 combines dual-parameter measurement capability with microprocessor-based accuracy in a highly portable package. The instrument offers both TDS and conductivity readings with ±2% TDS accuracy and temperature sensing across a 0-80°C range, supported by compact dimensions and simple battery operation.
Practical Tips
If calibration verification is desired, use certified conductivity standard solutions appropriate for your measurement range.
Why: External standards provide traceability for critical measurements where accuracy verification is required.
Rinse the electrode with distilled water after each measurement and gently dry before storage.
Why: Prevents sample carryover and maintains electrode surface condition for consistent measurements.
Allow 10-15 seconds for measurement stabilization, particularly when moving between samples with different TDS levels.
Why: Ensures the electrode reaches equilibrium with the new sample for accurate readings.
Record both TDS and conductivity values along with sample temperature for complete documentation.
Why: Temperature affects ionic mobility, and recording all parameters provides context for data interpretation.
If readings appear unstable, check battery charge level and ensure the electrode tip is fully immersed in sample.
Why: Low battery voltage and inadequate electrode contact are common causes of measurement instability.
Avoid measuring samples above 80°C or corrosive solutions that may damage the electrode.
Why: Operating beyond specifications may affect accuracy and potentially damage the sensing elements.
Use fresh samples when possible, as standing water may show TDS changes due to evaporation or contamination.
Why: Fresh samples provide the most representative measurements of actual source water quality.
Store the instrument in a clean, dry environment when not in use to prevent electrode degradation.
Why: Proper storage conditions extend electrode life and maintain measurement accuracy over time.
Setup Guide
What’s in the Box
- TDS meter (Model LH-TDS9)
- User manual
Warranty
ConductScience provides standard manufacturer warranty coverage with technical support for instrument operation and troubleshooting assistance.
Compliance
What is the measurement accuracy for TDS determinations?
The instrument provides TDS measurements with ±2% accuracy across the full scale range of 0-9999 ppm (mg/L).
Can the meter measure samples at elevated temperatures?
Yes, the integrated temperature sensor enables measurements from 0°C to 80°C (32-176°F), suitable for both ambient and heated sample analysis.
How does the instrument convert conductivity to TDS values?
The microprocessor applies standard conversion factors based on the relationship between ionic conductivity and dissolved solid concentration, displaying both parameters simultaneously.
What maintenance procedures are required for accurate measurements?
Regular electrode cleaning with distilled water after each use and proper storage in clean, dry conditions maintain measurement accuracy over time.
Is the instrument suitable for measuring highly purified water?
The 0-9999 ppm TDS range includes low-conductivity measurements appropriate for deionized water and other purified water systems.
How long do the batteries typically last during normal use?
Battery life depends on usage frequency, but the two AG13 button batteries provide extended operation for routine laboratory and field measurements.
Can the meter be used for continuous monitoring applications?
This is a handheld spot-measurement instrument designed for discrete sampling rather than continuous monitoring installations.
What types of samples are within the instrument's measurement capabilities?
The meter is suitable for aqueous samples including drinking water, process water, environmental samples, and solutions with TDS levels up to 9999 ppm.
Have a question about this product?
Frequently Bought Together
