Milwaukee pH54 Waterproof pH Tester with Replaceable Probe

SKU: 9139-PH54~ea

Milwaukee pH54 Waterproof pH Tester with Replaceable Probe

SKU: 9139-PH54~ea
Regular price $73.24 CAD
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Milwaukee pH54 Waterproof pH Tester with Replaceable Probe

The Milwaukee Waterproof pH54 Tester is an accurate, low cost, rugged and reliable pH Tester.  It is ideal for use in aquariums, hydroponics, horticulture, education and many other applications.

A large LCD screen makes reading results easy.  The 2-point manual calibration is quick and offers the accuracy of much more expensive meters.  It has an easily replaceable probe which designed for a longer life.  The Tester is lightweight and waterproof to IP65. 


  • Fast, easy to read results with a large digital LCD readout
  • Extreme pH accuracy to ±0.1 pH with a pH range (0.00 pH to 14.00 pH)
  • Extra Resolution to 0.01 pH
  • Lightweight and portable
  • Easy measurement: just place the probe in the sample, gently stir, wait for the stability indication to show a stable reading and then freeze the reading
  • Simple manual one or two-point calibration
  • Gel-filled, double junction pH electrode for low maintenance and high performance.
  • Fully waterproof to IP65
  • Over 1500 hours of continuous battery life (batteries included)
  • Replaceable pH electrode MA73600


  • pH Range: 0.00 to 14.00 pH
  • pH Resolution: 0.01 pH
  • pH Accuracy: ±0.1 pH
  • Typical EMC Deviation: ±0.1
  • Calibration: Manual, 1 or 2 points
  • Probe: Replaceable double junction for extended life (MA73600)
  • Environment: 0 to 50°C / 32 to 122°F; max RH 100%
  • Battery Type: 3 x 1.5V; IEC LR44, A76 (included)
  • Battery Life: Approx. 1500 hours of continuous use
  • Dimensions: 7.9 inches × 1.5 inches (diameter)
  • Weight: 3.5 ounces (99.22 g)

Milwaukee pH54 Manual


All pH sensors have a limited life and response time gets longer with age. Properly maintaining your pH Tester will give you fast, accurate results for longer.

Here are our top four tips.
1. Always store with the cap full of buffer or storage solution MA9015, not water.
2. Clean your Tester regularly by soaking in cleaning solution MA9016.
3. Calibrate after cleaning and/or storage before testing to adjust for changes in the pH sensor.
4. Gently stir the Tester in the sample for a faster result.

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