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

Description

Experience accurate water testing across a wide range of applications with the Milwaukee Waterproof pH55 PRO pH/Temp. Tester. Designed for buyers seeking reliability, this rugged digital pH tester delivers trustworthy results for aquariums, hydroponics, horticulture, pools, brewing, labs, and more. With dual level LCD screens, an easily replaceable probe, and extended pH measurement capabilities, you get fast, precise, and dependable readings every time. Auto calibration simplifies setup, so you spend less time preparing and more time testing. Choose the tester that brings professional accuracy to your water analysis, all in a lightweight waterproof handheld design built for real-world environments.

Unlock versatility and confidence with:

Precision and Accuracy

Measure with confidence thanks to ultra-precise ±0.1 pH & ±0.5°C accuracy, displayed clearly on a large LCD. This Milwaukee PRO tester makes every test easy to interpret for accurate dosing and control.

Durability and Long Life

The replaceable double junction pH electrode is engineered for long-lasting performance, ensuring your investment lasts through daily use and challenging conditions.

Fast, Reliable Readings

Get immediate, stable results even in demanding environments. This tester is ready for quick checks or daily routines, always providing the clarity you need for effective water management.

Waterproof Protection

Operational confidence is built in thanks to the IP65 waterproof certification, making the pH55 PRO ideal for active settings and on-the-go professionals.

Lightweight Convenience

Weighing just 3.5 ounces, the pH55 PRO is easy to handle wherever you need to test, combining portability with powerful features.

Easy Operation

The intuitive dual-level LCD ensures settings and measurements are simple to follow, eliminating guesswork and making calibration effortless—ideal for both beginners and pros.

Design Features

• Fast, easy-to-read results with a large digital LCD readout
• Extreme pH accuracy to ±0.1 pH within an extended range (-2.0 to 16.0 pH)
• 0.1 pH resolution for precise measurement
• Compact, portable build for easy handling
• Simple measurement: insert the probe, stir, watch for stability, and freeze the reading
• Automatic temperature compensation (ATC) for reliable readings in varying conditions
• Easy 1- or 2-point automatic calibration
• Supports acid and base calibrations with PH-START, MA9010 (10.01 cal. buffer), or M10010B for basic calibration
• Two available pre-memorized buffer sets (pH 4.01, 7.01, 10.01 or 4.01, 6.86, 9.18)
• Gel-filled, double junction pH electrode for stable, low-maintenance performance
• Over 300 hours of battery life (batteries included)
• Waterproof to IP65
• Replaceable pH electrode: Mi56P

Care and Use

For best results, maintain your Milwaukee pH55 PRO by following these care guidelines. Proper pH pen maintenance means faster, more consistent readings—order the Milwaukee pH Maintenance Kit code PH-Main at checkout to keep your electrode in top shape.

Always store the pH probe in MA9015 storage solution. If MA9015 is unavailable, use tap water short term. Never store in distilled or reverse osmosis water, as this will damage probe sensitivity.

1. Always store upright with the cap full of MA9015 storage solution for the best results
2. Clean your tester regularly by soaking in MA9016 cleaning solution for about 20 minutes
3. Calibrate after cleaning or storage to ensure measurement accuracy
4. Gently stir the tester in your sample for a quick, steady reading

Choose Milwaukee to elevate your water testing results and buy with confidence.