AP-1 AquaPro Water Quality Tester (TDS)

AP-1 AquaPro water quality tester (TDS), temperature compensated TDS meter

£22.90 £19.08
In stock
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Ideal for all TDS testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment, wine, coffee, agriculture and more. 

HM Digital introduces its new AquaPro series, a line of handheld TDS/EC meters with a sleek design that's perfect for today's modern kitchen. The AquaPro digital water testers are the next generation for today's tech-savvy and health-conscience consumer. 

This is a modern lightweight meter that has a magnetic back that can be left in your kitchen stuck to your fridge door. HM Digital are the leader in producing, affordable, long lasting & accurate water testing meter. This item is delivered ready calibrated but if you wish to purchase the recalibration fluid we do keep this in stock too.


  • Measures total dissolved solids (TDS) and temperature
  • Automatic temperature compensation (ATC)
  • Water-resistant housing
  • Measurement range: 0 - 5000 ppm
  • Digital calibration (push button)
  • Auto-off function, data-hold function and low-battery indicator
  • Display: Large and easy-to-read LCD screen includes simultaneous temperature reading
  • Factory calibrated; the AquaPro is calibrated with a 342 ppm NaCl solution. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver
  • Includes a cap and batteries
  • Comes in a retail-oriented package

Technical Specifications

  • TDS range: 0 - 5,000 ppm (mg/L) 
  • Temperature range: 0 - 80 °C; 32 - 176 °F 
  • Resolution: 1 ppm; Temp. resolution is 0.1 °C/F 
  • Accuracy: +/- 2%
  • Conversion factor: NaCl (avg. 0.5) 
  • Calibration: Digital calibration by push button 
  • Housing: Water resistant
  • Power source: 1 x 3V button cell (included) (model CR2032)
  • Dimensions: 15 x 2.8 x 1.3 cm (5.9 x 1.1 x .5 inches) 
  • Weight: 42.5 g (1.5 oz)

Patents Pending

342 NaCl = 362 as KCl ; 478 as "442" ; 700 µS

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