Milwaukee MC122 pH Controller with Electrode – Continuous pH Monitoring & Control Made Easy

Take the guesswork out of pH regulation with the Milwaukee MC122 pH Controller – a trusted tool designed for precision, automation, and peace of mind. Whether you're growing plants hydroponically, maintaining a healthy aquarium, or fine-tuning a water treatment system, the MC122 offers continuous pH monitoring and on/off control, so you can set it and forget it.

Equipped with a high-accuracy pH electrode, adjustable setpoint, and LED alarm system, the MC122 gives you full command over your pH environment. Once connected to a dosing pump or CO₂ system (not included), it becomes an automated solution that helps maintain your ideal pH range – 24/7.

From hydroponic growers to aquarists, lab technicians to industrial operators, the MC122 delivers reliable control in a compact, easy-to-use unit trusted worldwide.

Why Choose the Milwaukee MC122?

• Continuous Monitoring – Real-time pH readings with automatic regulation.
• Precision Control – Set your ideal pH range (setpoint adjustable from 5.5 to 9.5 pH).
• Built-In Alarm LED – Visual alerts when pH is out of range.
• Compact & Easy to Install – Wall-mountable, durable housing.
• Includes Quality pH Electrode – Ready to go right out of the box.
• BNC Connection – Compatible with a wide range of pH probes.
• Ideal for Automation – Control acid/base dosing or CO₂ injection with ease.

Proper Care & Maintenance

To keep your MC122 performing at its best:

• Always store the pH electrode in storage solution (not water).
• Clean the electrode regularly using a cleaning solution (like MA9016).
• Calibrate often using pH buffer solutions (like MA9004 and MA9007).
• Replace the electrode as needed to maintain accurate readings.

We recommend adding the Milwaukee pH Maintenance Kit (PH-Main) to your order to support cleaning, calibration, and storage from day one.

Automate with Confidence. Trust Milwaukee.

Whether you're growing, brewing, farming, or treating water – the Milwaukee MC122 is your reliable partner for pH control. Designed to simplify your workflow and protect your results, it's the perfect balance of performance and peace of mind.