Lab Grade. High Performance. Automated. Tough.
The Milwaukee MW150 MAX 3-in-1 pH/OPR/Temp. Bench Meter has won fans around the world with its reliable, fast, simple operation as well as a tough, sleek, lightweight design with a small lab space footprint. It is accurate to ±0.01 pH with automatic or manual temperature compensation, and built in dedicated GLP key. In addition, up to 3-point automatic calibration and 7 selectable buffer standards makes the MW150 MAX ideal for use by brewers, wine makers, growers, labs, food processing, water treatment and many other applications with challenging pH measurement needs.

Summary
The Milwaukee MW150 MAX 3-in-1 PRO pH/ORP/Temp Bench Meter is preferred by people testing all types of samples viscus or not, in a variety of applications that cause other pH meters and electrodes to fail. The MA917B/1 Milwaukee double junction electode is refillable and easy to clean.  From brewers and wine makers to hydroponic growers, labs and water treatment, the MW150 MAX is your Bench Meter for fast, accurate readings.

The Milwaukee MW150 MAX pH Bench Meter offers:

Accuracy
People choose the MW150 MAX 3-in-1 pH/ORP/Temp Meter to improve the accuracy of their testing program. With up to 3 point calibration and 7 standard buffer choices, the meter can be quickly calibrated to a higher accuracy compared with 1 or 2 point calibration. The MW150 MAX Bench Meter is accurate to ± 0.01 pH. 5x more accurate than some alternative meters.

The meter comes with a double junction pH electrode (included) and  temperature sensor MA831R (included) allowing the meter to automatically adjust the pH reading for the effect of temperature (ATC).

The meter can also be used as a very accurate thermometer with accuracy +/-0.4°C | +/-0.8°F. 

Toughness
The rugged meter is built to take knocks and is sleek and lightweight .

Low Maintenance
The MW150 MAX pH/OPR/Temp Bench Meter comes with the Milwaukee refillable glass MA917B/1 pH electrode and has a BNC connector allowing easy interchange to any pH Milwaukee electrode. This is Milwaukee's top selling lab grade electrode for a reason. Designed to be both low maintenance (refillable) and able to withstand more challenging samples (double junction). The MA917B/1 is ideal for use in beer making, winemaking and hydroponics, environmental labs and many other applications. 

Design Features

• Fast easy to read results with large dual-level digital LCD readout
• Extreme accuracy and extended range
• Lightweight and small bench footprint
• Refillable, double junction, lab grade pH electrode for low maintenance and high performance
• Rugged stainless temperature probe
• Automatic Temp. Compensation (ATC)
• Up to three-point automatic calibration
• Up to 7 selectable pH calibration buffers 
• Built-in rechargeable battery with 8 hours battery life (battery included)
• Auto-off feature to prolong battery life
• Alphanumeric LCD for intuitive information display
• Internal clock and date to keep track of different time-dependent functions
• Dedicated GLP key to store and recall data on system status
• 3’ probe cables for extra flexibility
• MA917B/1 pH electrode & MA831R Included.
• ORP probe sold separately.
• Care and Use 
• 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.
• Range:-2.00 to 20.00 pH | ±2000.0 mV | -20.0 to 120.0°C (-4.0 to 248.0°F)
• Resolution:0.01pH | 0.1mV | 0.1°C (0.1°F)
• Accuracy:±0.01 ph | ±1 mV | ±0.4°C |±0.8°F

Care and Use
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 electrode will no longer function.

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

Cleaning and Storage
All pH sensors have a limited life and response time gets longer with age. Properly maintaining your pH pen tester will give you fast, accurate results for longer. So, be sure to order the Milwaukee pH Maintenance Kit code PH-Main at checkout time!  This will be needed to help clean and condition the pH electrode before use!

Storage
To minimize clogging 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.

The best way to store the probe is with the probe's cap filled with storage solution or calibration buffer 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 an Maintenance
Residue from the sample can impact the sensitivity of the sensing bulb and clog the junction. This is especially true if the sample has a lot of organic material. We recommend regularly soaking your electrode in cleaning solution MA9016 for about 20 minutes. Also:

1. Inspect the electotrode for damage or scratches, if present replace the electrode.

2. Inspect the cable.  The connection cable and insulation must be intact.

3. Connectors should be clean and dry.

4. Rinse off salt deposits with water or DI water.

Calibration
The pH sensing bulbs become less sensitive over time so make sure that you are calibrating regularly to keep your PRO Plus Bench pH Meter accurate. Also, calibrate after cleaning or a long period of storage.  For BEST value on calibration, cleaning and storage solutions order pH-START.  If you need to calibrate at 10.01 point order MA9010.