HM Digital Handheld TDS-3 Water Quality Meter


SAVE $6.29 (21%)

The Hm Digital TDS-3 Meter is the first step to pure water. This handheld tester measures and displays total dissolved solids, or TDS found in your water. High TDS levels can be harmful to plants, preventing nutrient absorption and exposure to toxic containments. The TDS-3 is highly efficient and provides accurate readings using microprocessor technology making it great for both home and commercial use. Meter also features a built-in thermometer, hold function, 10-minute idle auto-off function, and comes factory calibrated.

  • TDS Range: 0 – 9990 ppm (mg/L)
  • Temp. Range: 0 – 80 degrees Celsius
  • Accuracy: +/- 2%

More Info

Out of stock



HM Digital Handheld TDS-3 Tester Model

With its rugged design and build, the TDS-3 is an ideal meter (tool) that can be used for any application; Ranging from water purification to hydroponics to industrial wastewater treatment. It comes with a black vinyl carrying case, protecting it when carried in a toolbox.


  • Hold Function
  • Auto-off Function (After 10 min.)
  • Built-in digital thermometer
  • Includes a carrying case with a belt clip
  • Factory Calibrated with a 342 ppm NaCl solution. (Meter can be recalibrated with a mini-screwdriver).


  • TDS Range: 0 – 9990 ppm (mg/L)
  • Temp. Range: 0 – 80 degrees Celsius
  • Resolution: 0-999: 1 ppm; 1000-9990: 10 ppm (indicated by a ‘x10’ icon)
  • Temperature Resolution: 0.1 degree Celsius (Celsius only)
  • Accuracy: +/- 2%
  • EC-to-TDS Conversion Factor: NaCl (avg. 0.5)
  • ATC: Built-in sensor for Automatic Temperature Compensation of 1 to 50 degrees Celsius (33 to 122 degrees Fahrenheit)
  • Power source: 2 x 1.5V button cell batteries (included) (LR44 or equivalent)
  • 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)
  • Weight without case: 56.7g (2 oz)

View HM Digital TDS-3 Meter Instructions


Weight 0.5 lbs
Dimensions 5.5 × 1 × 1.25 in

Product Category

Controllers & Meters


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