Milwaukee MC720 Hydroponic pH Controller Kit with Dosing Pump for Nutrient Management

The pH Controller and Pump Kit Milwaukee MC720 lets you measure and adjust pH levels automatically.

The Milwaukee MC720 pH Controller and Pump Kit is widely recognized in scientific literature and industry publications for its reliability in precise pH monitoring. Reviews from aquaculture specialists and horticultural users consistently highlight its durability, ease of use, and consistent accuracy. This kit is popular for nutrient tanks, hydroponics, aquariums, and other applications where stable pH is critical, with users praising its automation features and dependable performance.

The MC720 kit includes the MC122 controller and the MP810 dosing pump to automatically monitor and fine-tune pH levels. Just set your pH parameters and let the Milwaukee pH Controller and pump do the rest. The Milwaukee PRO pH controller kit 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 tester and pump offer:

ACCURACY

The Milwaukee PRO pH tester provides readings accurate to ±0.2 pH with simple two-point manual calibration.

AUTOMATION

The controller operates in a control range of 5.5 to 9.5 pH and triggers alarms when readings exceed set thresholds.

COMPATIBLE DOSING PUMP

The included Milwaukee MP810 dosing pump is designed for seamless integration with the MC122 controller for automated dosing.

EASY INSTALLATION

The MC720 kit comes with a complete mounting set, including a probe holder for fast and secure setup. MC122 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)

MP810 SPECIFICATIONS

• Max. Flow: 0.6 L/h
• Max. Pressure: 1.5 bar
• Squeeze tubing: Santoprene
• Ext. Tube connection: 6 mm
• Power supply: 240 VAC, 50-60 Hz or 110 VAC, 60 Hz
• Power consumption: 0.42 W
• Dimensions: 100 x 106 x 108 mm
• Weight: 17.6 oz.

DESIGN FEATURES

• Large digital LCD readout for fast and easy monitoring
• Accurate to ±0.2 pH over 0.0 to 14.0 pH with user-selectable high/low set points
• Simple two-point calibration with manual trimmers for precise adjustment
• Gel-filled, double junction lab-grade pH electrode for long life and low maintenance
• 6.5-foot probe cable for flexible placement
• 12 VDC power supply included
• Pump provides a maximum pressure of 1.5 bar or over 50 feet of head pressure with a 0.16 GPM dosing flow

USE AND CARE

pH meters often degrade due to probe issues. Key components affecting performance are the glass sensing bulb and the reference junction.

SENSING BULB

The glass bulb gradually loses sensitivity with use and will eventually fail, as is typical for all pH probes.

REFERENCE JUNCTION

The reference junction allows the meter to compare the sample with a reference. If the junction clogs, readings become inaccurate.

STORAGE

Keep the pH probe hydrated. Avoid storing dry, which may reduce sensitivity and clog the junction. Use pH probe storage solution or calibration buffers. Do not use tap or deionized water. Store upright with the cap filled and tightened to prevent leaks.

CLEANING

Organic residues can reduce bulb sensitivity and clog the junction. Soak the electrode regularly in cleaning solution to maintain performance.

CALIBRATION

Sensing bulbs lose sensitivity over time. Calibrate regularly, especially after cleaning or long storage, to maintain accurate readings.

For hydroponic nutrient management systems that demand automated monitoring and adjustment, pairing the Milwaukee MC122 pH Controller with your hydroponics pH tester kit enhances stability of pH levels in recirculating solutions with continuous feedback control. To broaden your analytical capabilities in greenhouse or hydroponic settings, the Portable pH/EC/TDS/Temperature Meter offers integrated measurement of pH, conductivity and dissolved solids, enabling more complete water quality profiling alongside the pH controller. For applications where multi‑parameter environmental monitoring is critical, the pH/EC/Temp Monitor for Pools and Water Tanks provides automated, round‑the‑clock tracking of key solution parameters with data display and control functionality.

To expand your nutrient solution monitoring and control system beyond the Hydroponics pH Tester and Pump Kit — designed to measure pH and automatically dose corrections in hydroponic reservoirs — consider additional instruments that strengthen environmental and solution quality management. The Conductivity EC Controller for Nutrient Tanks provides automatic monitoring and regulation of electrical conductivity, helping maintain optimal nutrient concentration levels. For broader water quality assessment in growing systems, the Portable Water Quality Meter integrates pH, conductivity, dissolved oxygen, and temperature measurement in a rugged handheld design. Additionally, the 2‑Channel Temperature and Humidity Logger enables simultaneous logging of ambient conditions that influence plant health and nutrient uptake in controlled environments.

Q&A

What is the control range of the MC720 pH controller?

The MC720 operates in a control range of 5.5 to 9.5 pH with alarms for readings outside this range.

Can the MP810 dosing pump be used with other controllers?

The MP810 is designed specifically for use with the MC122 controller for optimal performance.

How do I extend the life of the pH probe?

Keep it hydrated, store in proper solution, calibrate regularly, and clean to prevent residue buildup and clogs.

Is the MC720 suitable for aquariums and hydroponics?

Yes, it is widely used for nutrient tanks, aquariums, and hydroponic systems to maintain precise pH levels.

How often should the probe be calibrated?

Calibrate the probe regularly, especially after cleaning or after long periods of storage, to ensure accurate readings.