Continuous pH Monitoring with Lab-Grade Accuracy
The Milwaukee MC120 PRO pH Monitor provides 24/7 pH monitoring with lab-grade accuracy and customizable alarms. Perfect for applications requiring constant pH oversight - from pools and spas to hydroponic systems, aquariums, and industrial processes - the MC120 PRO ensures you're always aware of pH conditions.
Set It and Forget It
Unlike handheld pH meters that require manual testing, the MC120 PRO continuously monitors pH and alerts you when levels drift outside your specified range. Mount it permanently, set your alarm parameters, and gain peace of mind knowing you'll be notified immediately if pH moves beyond acceptable limits.
Key Features & Benefits
Continuous pH Monitoring
The large digital LCD display provides an always-visible pH reading, allowing you to check pH status at a glance without manual testing. Monitor pH trends over time and catch problems before they become critical.
Customizable Alarm System
Set your ideal pH range between 5.5 and 9.5 pH. The MC120 PRO activates an alarm when pH readings move higher or lower than your setpoint, alerting you to take corrective action immediately. This early warning system prevents pH-related problems in pools, grow systems, aquariums, and industrial processes.
Lab-Grade Accuracy
With ±0.2 pH accuracy across the full 0.0-14.0 pH range and 0.1 pH resolution, the MC120 PRO delivers reliable data for professional applications. Two-point manual calibration ensures accuracy over time.
Professional MA911B/2 Electrode
Includes the Milwaukee MA911B/2 double junction, gel-filled pH electrode designed for continuous immersion and low maintenance. The double junction design prevents sample contamination and extends electrode life in challenging applications.
Complete Mounting Kit
The MC120 PRO comes with a full mounting kit including probe holders, making permanent installation simple and secure. Mount the monitor where you need visibility and position the probe for optimal measurement.
Reliable Power
Powered by the included 12 VDC adapter, the MC120 PRO provides continuous operation without battery changes. Simply plug in and monitor.
Technical Specifications
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pH Range: 0.0 to 14.0 pH
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pH Resolution: 0.1 pH
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pH Accuracy: ±0.2 pH
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Calibration: Manual 2-point
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Setpoint Range: 5.5 to 9.5 pH
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Alarm: Activates when reading is higher or lower than setpoint
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pH Electrode: MA911B/2 double junction, gel-filled (included)
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Display: Large digital LCD
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Operating Environment: 0 to 50°C / 32 to 122°F; max RH 95%
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Power Supply: 12 VDC adapter (included)
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Dimensions: 5.9 x 3.2 x 1.35 inches
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Weight: 6.3 oz (meter only)
Professional Applications
Pool & Spa Management
Maintain optimal pH for swimmer comfort, equipment protection, and sanitizer effectiveness. The MC120 PRO's alarm alerts you immediately if pH drifts outside the ideal 7.2-7.6 range, preventing corrosion, scaling, and ineffective chlorination. Mount near your pool equipment for constant visibility.
Hydroponic & Aquaponic Systems
Nutrient availability is pH-dependent. The MC120 PRO continuously monitors nutrient solution pH, alerting you to drift that could cause nutrient lockout and reduced yields. Set alarms for your crop's optimal pH range (typically 5.5-6.5) and respond quickly to maintain peak nutrient uptake.
Aquarium Monitoring
Different fish and coral species thrive at different pH levels. The MC120 PRO provides constant oversight of aquarium pH, alerting you to changes that could stress inhabitants. Particularly valuable for sensitive reef systems where pH stability is critical.
Industrial Process Control
Monitor pH in chemical processes, wastewater treatment, food production, and manufacturing. The continuous monitoring and alarm system ensures process parameters stay within specification, preventing quality issues and regulatory violations.
Laboratory & Research
Continuous pH monitoring for experiments, fermentation processes, and long-term studies. The MC120 PRO provides reliable data without requiring constant manual testing.
Electrode Care & Maintenance
The MA911B/2 electrode requires proper care to maintain accuracy and extend service life:
Storage
Keep the pH probe hydrated when not in continuous use. Store in pH storage solution or calibration buffer - never in tap water or DI water, which will damage probe sensitivity. The probe cap should be filled with storage solution and tightened to prevent leakage. Store the electrode upright to minimize leakage risk.
Cleaning
Residue from samples can coat the glass bulb and clog the reference junction, especially in organic-rich applications. Regularly soak the electrode in pH cleaning solution to remove buildup and maintain sensitivity.
Calibration
The glass sensing bulb becomes less sensitive over time. Calibrate regularly using pH 4.01 and 7.01 (or 10.01) buffer solutions to maintain accuracy. Always calibrate after cleaning or extended storage periods.
What's Included
- Milwaukee MC120 PRO pH monitor
- MA911B/2 double junction, gel-filled pH electrode
- Complete mounting kit with probe holders
- 12 VDC power adapter
- Instruction manual
Note: Calibration solutions, storage solution, and cleaning solution are sold separately.
Milwaukee Instruments Quality
Milwaukee Instruments has built a reputation for reliable, accurate measurement tools trusted by professionals worldwide. The MC120 PRO continues this tradition with continuous monitoring capability, alarm functionality, and the quality components Milwaukee is known for.
Investment in Peace of Mind
At $139.15, the Milwaukee MC120 PRO pH Monitor provides continuous oversight and early warning capability that manual testing can't match. The combination of lab-grade accuracy, customizable alarms, included electrode, and complete mounting kit makes it an essential tool for applications where pH stability matters.
Monitor pH with Confidence
Whether you're managing pool chemistry, optimizing hydroponic yields, maintaining aquarium health, or controlling industrial processes, the Milwaukee MC120 PRO delivers continuous pH monitoring with the alarm protection you need.
Order your MC120 PRO today and gain 24/7 pH oversight with lab-grade accuracy.
