Milwaukee PH55 PRO Waterproof pH & Temperature Tester with ATC & Replaceable Probe

Milwaukee PH55 PRO Waterproof pH & Temperature Tester with ATC & Replaceable Probe

The Milwaukee PH55 PRO Waterproof pH & Temperature Tester delivers professional-grade accuracy, durability, and ease of use for serious growers and water quality specialists. Designed with a replaceable probe, automatic temperature compensation (ATC), and a waterproof housing, it’s ideal for hydroponics, aquariums, pools, and laboratory applications where precision matters.

With a pH range of –2.0 to 16.0 and ±0.1 accuracy, the PH55 ensures dependable results in a wide variety of environments. Its dual-function design measures both pH and temperature simultaneously, providing complete water condition insight in one compact, easy-to-use tester.

Key Features

• High accuracy: pH range –2.0 to 16.0 with ±0.1 pH precision

• Dual measurement: pH and temperature readings in one device

• Automatic Temperature Compensation (ATC): Adjusts readings for temperature changes

• Replaceable probe: Extends the tester’s lifespan for long-term value

• Waterproof design: Built for durability in demanding environments

• Simple calibration: One- or two-point manual calibration for consistent accuracy

Applications

• Hydroponics & Horticulture: Maintain precise nutrient pH levels for optimal plant health

• Aquariums & Aquaculture: Ensure stable water chemistry for aquatic life

• Swimming Pools & Spas: Keep water balanced for safety and comfort

• Laboratories & Research: Compact, reliable instrument for field or bench testing

• Food & Beverage Production: Monitor pH for consistency, safety, and quality control

Proper Care & Maintenance

• Always store with the cap filled with storage solution (MA9015), not water

• Clean regularly by soaking in electrode cleaning solution (MA9016)

• Calibrate after cleaning or prolonged storage to maintain accuracy

• Gently stir the probe in the sample for a stable reading

• For optimal performance, use the Milwaukee pH Maintenance Kit (PH-Main) to clean and condition the electrode before use

Specifications

• Model: Milwaukee PH55 PRO pH & Temperature Tester

• Range: pH –2.0 to 16.0 | Temperature 0–60°C (32–140°F)

• Accuracy: ±0.1 pH | ±0.5°C (±1°F)

• Compensation: Automatic Temperature Compensation (ATC)

• Probe: Replaceable pH electrode

• Waterproof Rating: IP65

• Calibration: One- or two-point manual

• Power: Batteries included