Bluelab Combo Meter Review (2023)

bluelab combo meter

Are you struggling to get your plants to thrive? The Bluelab Combo Meter is the perfect tool for green thumbs who need help with the problems that come with everyday growing.

This device takes accurate pH, conductivity, and Temperature readings to determine if adjustments are needed to keep your plants healthy and robust.

With its two probes, the device gives you complete control over these three essential parameters for an excellent growing environment for your garden.

Don’t leave your plants’ well-being up to chance – get equipment that reads specific data that will give you insights into how best to adjust pH, conductivity, and temperature levels so you can monitor and care for your garden like never before!

Check out the Bluelab Combo Meter now – it’s time to take your gardening game to the next level!

Bluelab combo meter

Bluelab Combo Meter

The Bluelab Combo Meter is a portable Meter that takes measurements of pH, conductivity, and temperature within a solution.

Made in New Zealand and manufactured by Bluelab, the industry leader in hydroponic testing equipment, built for growers; 5-Year Limited Warranty.

What is the Bluelab Combo Meter?

The Bluelab Combo is a triple-parameter electronic meter designed to measure pH, conductivity (EC), and temperature.

Its advanced technology allows you to get precise readings quickly and easily by immersing the probe into a sample solution.

You can select whichever best suits your nutrient uptake needs with customizable scales.

Who created the Bluelab Meter?

The New Zealand-based company, Bluelab, created the Bluelab Combo.

They specialize in providing clear-cut and reliable monitoring and control solutions to growers worldwide.

The advanced technology behind the Combo was developed over more than 20 years of research and development in hydroponics, horticulture, and agriculture.


What are some of the top benefits of the Bluelab Combo Meter?

  • Measures pH, conductivity, and temperature on the go

  • Brilliantly simple design that’s easy to use, clean, and calibrate

  • The backlit display allows you to capture every reading quickly and accurately.

  • It includes a pH probe and Conductivity Probe for comprehensive nutrient uptake analysis.

  • 6-foot cable provides the flexibility to reach tight spots

  • You can customize the scales to your preference, with conductivity available in EC, CF, PPM 500 (TDS), or PPM 700 and temperature in either °C or °F.

Some of the Best Features of the Bluelab Combo Meter

Includes the Replaceable Bluelab pH Probe

If you’re looking for a precise and reliable way to measure the pH of your growing environment, look no further than the Bluelab pH probe.

An essential related product in any gardener’s toolbox, this pH probe is a long-lasting and cost-effective solution for taking multiple readings to accurately assess soil or water quality.

Low in maintenance and easy to use, you can quickly replace the probe whenever necessary without investing in a whole new device.

bluelab ph probe

Double Junction pH Probe For Fast And Accurate Readings

Double Junction electrodes are essential for laboratory testing involving samples containing proteins, heavy metals, or sulfides.

The unique design of these electrodes includes an additional salt bridge which prevents any reactions between the electrode fill solution and the sample.

This salt bridge is necessary to ensure that the reaction occurring at the junction does not damage the electrode.


Includes a Five-year guarantee for the Bluelab Combo and; a six-month guarantee for the Bluelab pH Probe (proof of purchase is required).

Bluelab Combo Meter Pricing

The current price on Amazon is $214.16.

They offer a payment plan from $35.69/month(6 months) with 0% APR.

Pros and Cons of the Bluelab Combo Meter

Bluelab Combo Pros

  • Automatic Temperature Compensation

  • Auto-Off Function

  • Large Easy To Read Backlit Display

  • Simple Push Button pH Calibration

  • Replaceable pH Probe w/ Cap for Storage Solution

  • Low Battery Indicator

  • Built For Growers

Bluelab Combo Cons

  • Not Waterproof

  • Relatively Expensive

  • Requires Frequent Calibration

What are some alternatives to the Bluelab Combo Meter?

Hanna HI 9813-6N

Hanna HI 9813-6N

The Hanna HI 9813-6N waterproof multi-meter is perfect for hydroponics or greenhouse gardening as it measures pH, electro-conductivity and temperature.

It comes with a combination pH and conductivity probe and cable, a starter set of calibration solutions and cleaning sachets, a check solution sachet, and instructions to help you get going.

This meter features a check function (Cal-Check) that confirms the precision of your measurement, while the LCD screen offers guidance and clarity during use.

Milwaukee MW801

Milwaukee MW801

The Milwaukee MW801 has Automatic Temp Compensation (ATC), manual one-point calibration via dials, a reliable single-line LCD display, an MA850 combination amplified gel probe with incorporated EC/TDS functionality and integrated temp sensor, as well as a corrosion-resistant mounting kit and insert holder.

Groline HI 9814

Groline HI9814

The Groline HI 9814 is designed efficiently, combining the conductivity with two more sensors into one pre-amplified probe – pH, EC, and TDS (ppm).

It features a polypropylene body, a cloth junction, and an integrated temp sensor – perfect for more reliable measurements.

Plus, its Quick CAL mode makes it easier to get started fast with its single-point calibration – ensuring your results are reliable every time. 

Bluelab Combo Meter Personal Experience

Several of my colleagues and I have used Bluelab’s Combo for years; it’s played a pivotal role in our indoor operations, and we have been thrilled with its performance.

My Experience Using Bluelab’s Combo Meter

I have been using Bluelab’s Combo meter for everyday growing in my home-based hydroponics setup for years, giving me complete peace of mind.

It is one of the most straightforward meters out there for taking accurate pH measurements and conductivity/total dissolved solids (TDS). Calibration is super easy and quick, making maintenance a breeze!

It has been an invaluable tool to help ensure my plants receive just what they need without needing to buy an entirely new meter every time the probe needs replacing.

bluelab combo meter

Frequently Asked Questions

How do you calibrate a Bluelab pH Combo Meter?

pH 7.0 Calibration

  • Press any button to turn the meter on.

  • Rinse the probe’s tip in fresh water.

  • Press the CAL button until CAL appears on the screen, then release.

  • A series of flashes will appear. Once calibrating is complete, PH7 will be displayed.

pH 4.0 Calibration

Repeat the above steps. Once calibrating is complete, PH4 will be displayed.

How often do you calibrate a Bluelab combo meter?

Bluelab recommends calibrating their pH probes at least once a month. I recommend calibrating once every week.

Of course, this entirely depends on how often you are using it. The more often you use it, the more you should calibrate it.

How often should you change the pH storage solution?

Once you have opened a pH buffer or electrode filling solution, discard the unused portion after 2 to 3 months.

Do you need to rinse your pH meter between solutions?

I always recommend to rinse probes with water before and after measuring different samples and between calibration buffers and the sample.

Rinsing helps to ensure that any contamination from one sample does not influence the following measurements taken. 

How do I know if my pH meter is correct?

The only reliable way to determine whether your meter is accurate is to test it in standard solutions.

Similarly, you can only tell if a scale is accurate by testing it with standard weights.

Can I store my pH meter in tap water?

Putting pH probes in a storage solution is recommended if you need to store the meter for an extended period.

Storing it in tap water may lead to inaccurate readings due to contamination from chlorine or other chemicals found in tap water.

How long should a pH meter last?

Although the average life expectancy of pH probes is between 12 and 18 months, it all boils down to how much you use your device, what type of sample you are measuring, and its proper maintenance.

Bottom Line: Is the Bluelab Combo Meter right for you?

The Bluelab Combo Meter is second to none, making it an indispensable tool. With its reliable double junction ph probe replacement feature and its 5-year warranty, this product is unbeatable.

Additionally, the simple push-button calibration makes it simple and straightforward to use.

This tool is essential for anyone looking to sustain their crops’ health and vitality, protecting gardeners from costly missteps resulting from incorrect measurements.

So if you’re in the market for a new meter, be sure to pick up a Bluelab Combo today!