TDS-3 Handheld TDS Tester

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This handheld TDS tester is perfect for measuring water quality in applications such as water purification, wastewater regulation, aquaculture, hydroponics, and colloidal silver. With its small size and carrying case, you can keep this meter with you at all times, making it the ideal tool for commercial use or around the house.



  • Includes a carrying case with belt clip
  • Advanced microprocessor technology ensures high efficiency and accuracy
  • Hold Function saves measurements for convenient reading and recording
  • Auto-off function shuts off the unit after 10 minutes of non-use
  • Built-in temperature sensor
  • Factory calibrated at 342 ppm NaCl solution
  • Meter can be recalibrated in the field
  • Built-in Automatic Temperature Compensation from 1°C to 50°C (33°F to 122°F)
  • 3 Year Warranty



  • TDS Range: 0 - 9990 ppm (mg/L)
  • Temp. Range: 0°C to 80°C
  • Resolution:
    • 1 ppm from 0 - 999 ppm
    • 10 ppm from 1000 - 9990 ppm
    • 1°C
  • Accuracy: +/- 2%
  • Power: 2 x 1.5V button cell batteries (included)
  • Battery life: 1000 hours of usage
  • Dimensions: 15.5 x 3.1 x 2.3cm (6.1 x 1.25 x 1 inches)
  • Weight with case: 76.5g (2.7 oz)
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