Milwaukee MC122 pH Controller Monitor

New product

Monitors, alerts, control changes in pH. Ideal for CO2 or ozone dosing.

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$ 248.00

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Milwaukee MC122 pH Controller Monitor is a smart device that automatically monitors and control pH levels and alerts you to any drastic changes in pH that occurs in the aquarium waters.

Use the Milwaukee MC122 pH Controller Monitor to keep pH within healthy levels to ensure the safety of your aquarium inhabitants.

The Milwaukee Instruments MC Controllers have a user-selectable set point and a visual Power-Activated LED notification light. Power to the controller box is turned on when the reading is Above or Below (user-selectable) the selected set point. These MC Controllers are ideal for CO2 or ozone dosing.


  • User-selectable Hi/Low Set Point
  • Manual 2 points calibration
  • Visual LED alarm
  • Supplied with 12 VDC adapter and mounting kit
  • Power plug for CO2 dosing
  • Double junction pH electrode with 2m cable (BNC connector)


The specification of Milwaukee MC122 pH Controller Monitor:

Range0.0 - 14.0 pH
Resolution0.1 pH
Accuracy+/-0.2 pH
CalibrationManual 2 points
AlarmActive when reading is higher or lower than set point
Dosing Contact1 power plug for CO2 dosing
pH ElectrodeMA911B/2 (included)


The package includes:

  • pH Controller Unit
  • 12 VDC adapter
  • Mounting kit
  • Probe
  • Probe holder
  • Starter calibration solution for pH

About Milwaukee Diagnostic Instruments

Milwaukee manufactures a complete range of diagnostic instruments (such as pH, ORP, temperature testers, monitor and controllers) for water testing. Milwaukee's diagnostic instruments are widely used by aquarists for monitoring aquarium water.

Regardless of which values you need to measure - pH, EC or TDS values, there is a Milwaukee instrument for it.

Milwaukee Instruments Online Shop

N30 is the authorised dealer in Singapore for Milwaukee aquarium diagnostics and testing instruments.

Order your Milwaukee water testers, meters and controllers online today at

About N30

About N30 Tank

N30 Tank Pte. Ltd. is a leading manufacturer of custom-made fish tanks cabinets. As a tank maker, we supply aquarium cabinets to homes and offices locally as well as ship orders worldwide.

N30 provides expertise in the construction of large acrylic aquariums, such as those in Underwater World (Resort World Sentosa). We supply customised storage tanks to fish farms such as Qian Hu, and to major restaurants. The N30 brand name is trusted for quality workmanship in the industry.

N30 has developed unique glass-sealing techniques, which allows us to produce very large tanks (such as 30-feet long) without issue of water leakage. For all custom-made fish tanks, N30 assures customers of Five Years Warranty against water leakage.

To support the needs of aquarium hobbyists, N30 is also offering a wide range of aquarium accessories such as filters, pumps, lighting, wave makers, skimmers... for sale online. We encourage customers to browse and shop online at for accessories. It is convenient and we provide free delivery for orders (see the online store terms and conditions for details).

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Loyalty Points (N30 Member Rewards)

Earn 5 points per dollar

N30 members earn five points per dollar spent online at Each point is worth S$0.01 in cash value.

Convert points into eVouchers redeemable for discounts on your orders.

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When you purchase S$100 of aquarium accessories online at, you will earn 500 points in your N30 account. You may convert the 500 points into an eVoucher worth S$5. To use this eVoucher on your next order, simply enter the unique eVoucher code in your shopping cart before you check out. That's all!

The more you shop on, the more you will save on your next order!

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