Milwaukee MC122 PRO pH Controller

Accurate. Simple. Reliable. 24/7 pH Control.

The Milwaukee MC122 PRO pH controller lets you measure and adjust pH levels automatically.

Summary

The MC122 controller automatically monitors and fine-tunes the pH levels. Just set your pH parameters and let the Milwaukee pH Controller do the rest.

The Milwaukee PRO pH controller is preferred by people looking to dial in their testing program when they have an ongoing need to maintain levels. Common uses are nutrient tanks and aquariums.

The Milwaukee PRO pH controller offers:

Accuracy
The Milwaukee PRO pH controller offers an accuracy to ± 0.2 pH with two point manual calibration.

Automation
The controller provides a control range of 5.5 to 9.5 pH with alarms that activate when readings are higher or lower than set point.

Compatible dosing pump
Milwaukee offers the MP810 dosing pump

Easy installation
The pH Controller comes with a complete mounting kit including a probe holder.

Design features

• Fast easy to read current results with large digital LCD readout
• Accurate to ±0.2 pH (0.0 pH to 14.0 pH) with the user selectable high/low set points
• Simple two-point calibration for increased accuracy with manual trimmers for easy adjustment
• Gel-filled, double junction lab grade pH electrode for low maintenance and high performance
• 6.5 feet probe cables for extra flexibility when testing
• 12 VDC power supply
   

Use and Care

pH meters usually start performing poorly because of problems with the probe. The two parts of the pH probe that cause problems are the glass sensing bulb and the reference junction.

Sensing bulb
The glass bulb loses sensitivity with use and will eventually fail. This is true of all pH probes.

Reference junction
The reference junction is a small hole that allows the meter to compare the sample to a reference. The reading is generated based on the electrical difference between the sample and reference. If the junction hole gets clogged, the pH probe will no longer function.

You can extend the life of your pH electrode in the following ways.

Storage
The pH probe needs to be kept hydrated. Long periods of dry storage will damage the sensitivity of the probe. Allowing the probe to dry out may also result in the junction hole getting clogged.

Store the pH probe in storage solution MA9015.  Only use tap water short-term if MA9015 is not immediately available and NEVER store in distilled Water (DI) or Reverse Osmosis (RO) water. This will damage the sensitivity of the probe.

This best way to store the probe is with the probe's cap filled with MA9015 Storage Solution and the cap tightened to prevent leakage. It is also recommended that to store the electrode upright to further reduce the potential for leakage.

Cleaning

Residue from the sample can impact the sensitivity of the sensing bulb and block the junction. This is especially true if the sample has a lot of organic material. We recommend regularly soaking the probe in MA9016 Cleaning Solution for about 20 minutes.

Calibration
The pH sensing bulbs become less sensitive over time so make sure that you are calibrating reguarly to keep your PRO pH controller accurate. Also, calibrate after cleaning or a long period of storage.

Specifications

• Range: 0.0 - 14.0 pH
• Resolution: 0.1 pH
• Accuracy: ±0.2 pH
• Set point: 5.5 to 9.5 pH
• Calibration: Manual 2 points
• Alarm Active when reading is higher or lower than set point
• Dosing Contact: 1 power plug for CO2 dosing
• pH electrode: MA911B/2 (included)
• Environment: 0 to 50°C / 32 to 122°F; max RH 95%
• Power Supply: 12 VDC adapter (included)
• Power Drivers: 115 VAC, 2A, 60Hz or 230 VAC, 1A, 50Hz
• Mounting kit (Included)
• Dimensions: 5.9 x 3.2 x 1.35 inches
• Weight: 6.3 ounces (meter only)