*Refurbished* AP-1 AquaPro Water Quality Tester (TDS)

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

was £22.90 Special Price £13.74 £11.45
Out of stock

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)

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

Please Note: The condition of clearance or refurbished items may vary. This product will be supplied with 3 months warranty from the date of payment.

Clearance or refurbished items may be sold with cosmetic damage including, but is not limited to, noticeable flaws, bent frame, chips or scratches. These will not affect the performance of the unit.

If the product is described as refurbished. This means an item has been repaired following a customer return.

If your item develops a fault within the warranty period, we may offer an exchange for the same, or a similar product, depending on our current stock. If we don’t have stock available for an exchange, a full refund will be processed once the item has been returned.

Patents Pending

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