Milwaukee pH51 - waterproof pH tester with replaceable probe

Milwaukee pH51 is one of the most accurate, robust and reliable budget pH testers on the market. The easily replaceable probe provides years of worry-free use. Ideal for use in hydroponics, aquariums, gardening, pools and many other applications.

• fast and easy-to-read results with a large digital LCD display
• measurement accuracy: ±0.1 pH
• measurement range: 0.0 - 14.0 pH
• easy calibration: 1-point or 2-point
• completely waterproof (IP65)
• built-in probe: MA73600 (replaceable)

Instructions for use here*. Calibration instruction video here*.

The set includes:

• 1x calibration solution pH 7.01 - 20ml
• 1x calibration solution pH 4.01 - 20ml
• 1x calibration screwdriver

Key features:

• measurement range: 0.0 - 14.0 pH
• resolution: 0.1 pH
• measurement accuracy: ± 0.1 pH
• easy manual 1-point or 2-point calibration.
• built-in probe: MA73600 (replaceable)
• operating conditions: 0 - 50°C; max. RH (relative humidity) 100%
• batteries: 3x 1.5V, IEC LR44, A76 (included)
• battery life: over 1500 h of continuous use
• batteries: included in the package
• dimensions: 16.5 cm , ⌀ 3 cm
• weight: 99 g
• instrument warranty: 1 year
• probe warranty: 6 months

Calibration:

1. Unscrew the battery-compartment cap at the top of the meter and follow this two-point calibration procedure:
2. Immerse the electrode in pH 7.01 calibration buffer solution.
3. Allow the reading to stabilise, then use a small screwdriver to turn the “7” calibration trimmer in the battery compartment until the display shows “7.0”.
4. Rinse the electrode with tap water and immerse it in pH 4.01 calibration buffer solution.
5. Allow the reading to stabilise, then use a small screwdriver to turn the “4” calibration trimmer until the display shows “4.0”.

Proper probe maintenance will give you fast, accurate results for longer. Here are our top four tips.

1. Always store it with the cap filled with buffer or MA9015 storage solution, and not water.
2. Clean your probe regularly by soaking it in MA9016 cleaning solution.
3. Calibrate after cleaning and/or storage before testing to correct changes in the pH and EC sensor.
4. Gently stir the probe in the sample for a faster result.