The Milwaukee MC720 PRO pH controller and pump lets you measure and adjust pH levels automatically.

Summary
The MC720US kit includes the MC122 pH controller and MP810 dosing pump to automatically monitor and fine-tune pH levels. Just set your pH parameters and let the MC720US pH Controller and pump do the rest.

The MC720US 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.

Features

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
The Milwaukee MP810 dosing pump (designed specifically for use with the MC122) is included in the kit.

Easy installation
The MC720 pH controller and pump kit 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
• Simple two-point calibration for increased accuracy with manual trimmers for easy adjustment
• 5.5 to 9.5 pH alarm set point range is easily accessible on the front panel
• Alarm activated when reading is above or below set point
• Comes with full mounting kit including probe holders
• Lab grade, double junction, gel filled probe designed for low maintenance
• 6.5’ probe cables for extra flexibility
• 12 VDC power supply
• Pump provides a maximum pressure of 1.5 bar or more than 50 feet of head pressure with a 0.39268 GPH / 9.5 GPD dosing flow.
• Uptake & Discharge Tubing Material: Polyethylene, 4.92' / 1.5 m.
• Black Pump Squeeze Tube Material:  Norprene.

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.