Effortless 24/7 pH Monitoring and Control

The Milwaukee MC122 PRO pH controller empowers you to automatically monitor and adjust pH in aquariums, hydroponic systems, and nutrient tanks with accuracy and reliability.

Set your ideal pH range, and let the MC122 take care of the rest. Enjoy seamless, real-time pH control with a wide 5.5 to 9.5 pH range and built-in alarms for peace of mind.

This controller is trusted by dedicated aquarists and growers who want precise, continuous pH management to protect aquatic life or optimize plant nutrition.

Customer Feedback

"I rely on this 24/7 for my aquarium. It's flawless, keeping my CO2 system balanced and my fish healthy."

"After two years in my hydroponic setup, it's still running strong. Minimal calibration needed, and the original probe is going."

"Highly recommended for anyone with a reef tank who values serious pH control."

Core Features

Precise Accuracy

Achieve consistent results with an accuracy of ±0.2 pH and easy, manual two-point calibration.

Automated pH Control

Automatically maintain your preset pH level, with alerts if readings drift outside your specified range.

Compatible with Milwaukee MP810 Dosing Pump

Seamlessly integrate automated dosing for hands-free maintenance.

Easy Setup

Includes a complete mounting kit and probe holder for quick, hassle-free installation.

Design Highlights

• Large, easy-to-read digital LCD display
• ±0.2 pH accuracy and simple manual adjustment
• Accessible 5.5 to 9.5 pH control range with front-panel adjustment
• Alarm alerts for readings outside set range
• Full mounting kit with secure probe holders
• Lab-grade, low-maintenance double-junction, gel-filled probe
• 6.5’ flexible probe cable
• 12 VDC power adapter
• Compact form: 5.9 x 3.2 x 1.35 inches
• Lightweight at only 6.3 ounces

Maintenance and Care

Ensure top pH control performance by caring for the probe. Both the glass sensing bulb and the reference junction are essential components that require attention.

Sensing Bulb

The sensitivity of the bulb decreases over time naturally, as with all pH probes.

Reference Junction

If the reference junction clogs, readings are impacted. Prevent this with proper care and storage.

Storage

Always store the pH probe in MA9015 storage solution, using the filled cap and keeping the electrode upright. Do not use distilled or RO water. Short-term storage in tap water is acceptable if MA9015 is unavailable.

Cleaning

Soak regularly in MA9016 cleaning solution for about 20 minutes to maintain sensitivity, especially after measuring organic-rich samples.

Calibration

To ensure ongoing precision, calibrate frequently and always after cleaning or extended storage.