Bluelab pH Combo Meter - Review 2020

Sunday, February 27, 2022

Review: Bluelab Combo Meter for your pH measuring needs

If you are looking for an upmarket solution to measure and meet your pH solution needs then the tried and true Bluelab brand has the measuring device you are looking for:

Bluelab has a reputation for making devices that help with crop management, soil testing, nutrient meters, and home-based hydroponics.

It's apparently really popular with marijuana enthusiasts in California and kombucha makers everywhere!

The Bluelab Combo Meter has the triple functionality of being a portable pH tester, conductivity reader and temperature taker all in one. This can be quite a handy combination for home brewing

Blue Lab Combo Meter for pH, Temperature and Conductivity

The meter has two probes, a Bluelab pH probe, and a Bluelab Conductivity and Temperature probe. When taking a reading, simply place them into the solution and the selected reading is displayed on the screen. 

best reviewed bluelab ph testerDead easy.

The beauty of the Bluelab system is that all their probes are compatible with their entire range. As with most decent pH testers, you'll need to purchase probe storage solution to maintain and prolong the life of the probe.

Calibration of the pH probe is quite simple as instructions are supplied on the back of the meter and the easy 'push button method' makes this one of the simplest meters to use for your brewing needs.

That said, there are plenty of mistakes people make when using meters, especially when calibrating.

The pH probe is quite replaceable so you can use this meter for many years to come. You should be able to do this as Bluelab offer a 5 year warranty on their product!

This surely gives you an idea as to the quality of the product and the faith the brand has in it. 

By utilizing the temperature function of the unit, you'll be able to take accurate readings during the boil and quite importantly, after you've cooled the wort sufficiently, you'll be able to record the correct temperature at which to pitch the yeast - old hands will know that if  you pitch yeast into a wort that's too hot, you will kill the yeast and no fermentation will begin. 

The Bluelab meter has the following features:

  • Measures pH, conductivity / nutrient (EC, CF, ppm 500 and ppm 700) and temperature (°Centigrade & Fahrenheit)
  • It's very lightweight and portable
  • Large easy to read display screen
  • Simple push-button operation for pH calibration
  • Successful pH calibration indication
  • No calibration is required for conductivity and temperature measurement taking
  • The double junction pH probe is easily replaceable 
  • Over range and under range indicators
  • Low battery level indicator
  • Two x AAA alkaline batteries included so you can start taking measurements immediately
  • Auto off function to make sure that the battery doesn't wear down.
  • Five year warranty for the unit itself, and six months for the probe.

Because of its demonstrated quality, this is a pricey unit but well worth it if you are a regular brewer who needs to monitor the hydrogen potential of their beer!

If you are looking for a mid-price range metering device, Blue Lab's portable pens are in the hundred dollar range. They are quite portable and come with a conductivity probe care kit.

good ph tester for home brewing

Here's some reviewer comment from happy buyers on Amazon:

"I am going on 6 months and it hasn't even needed to be re-calibrated."

"Very accurate. Nice meter, the ph probe is extremely fragile, do not tap this probe on anything or it will break" (This is a pretty common occurrence with most glass probes so is not necessarily a design flaw in the product and replacement is an easy process - Ed)

"Be sure to do the recommended meter maintenance and proper storage of probes."

"Recommended if precision means everything to you! Calibrate twice a month minimum if used daily, and buy some storage solution for the probe! It doesn't come with any extra storage solution, but it is a MUST to get some as well as extra 4.01 and 7.01 buffer solutions and you're set for a while!"

And finally this absolute gem of a product endorsement & review from a user:

"Easy to use. Worked right out of the box. Easy to calibrate and maintain. I'd wanted one for years but didn't want to spend the $$. Well, I'll tell you, it was worth it. I never knew how far off I was with just using measurements and test strips. The next batch that I produced using accurate measurements with the combo meter was astounding. Try it and see the difference."

Here's the official video from Bluelab which shows you how to prepare the meter for its initial use and how to correctly calibrate the device with the proper buffer solutions.

When should I clean the Blue Lab ph Meter?

For accurate pH readings the pH probe should be properly cleaned and then re-calibrated when:
  • when the on screen reading is quite different from what you were expecting. 
  • when the batteries have been run flat, removed or changed. This is because the device forgets its readings.
  • when the pH probe is replaced with a new one or is disconnected from the Combo Meter.
  • the pH calibration indicators have disappeared from the unit. 
When calibrating the pH after the machine's first use, the pH probe needs to be cleaned after each subsequent use.

How to correctly calibrate the meter

To obtain a correct pH calibration reading, the unit's accuracy is very dependent on the accuracy and age of the calibration solutions used, and the condition and cleanliness of the pH probe tip. You will get a calibration error if the unit is not properly maintained as per the instruction manual.

For best results, the user must ensure the pH probe has been cleaned and that it is rinsed with clean water between calibration solutions to reduce contamination of the pH solutions.

One should only use fresh and uncontaminated solutions. This means if your buffer solution has been sitting open on a shelf for a couple of years, you probably should obtain a new batch.

It's also best practice to calibrate the pH at the same temperature as the solution to be measured. 

good ph tester for home brewing

If you're not sold, you could consider these ph pens or check out our guide to five other top rated pH Testers.


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