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Bluelab Combo Meter – review of the handy tool for all growers

You can buy separate tools to measure pH, conductivity, and water temperature or one combo device that does it all. One of the leading brands for such tools is the Bluelab company, with one of their products called Bluelab Combo Meter. It is definitely a premium-priced product, but is it worth it?

Whether you are an experienced grower or just a beginner, tools like pH meter, conductivity meter, or water temperature meter are essential to all equally. All these fundamental parameters are vital for optimal plant health. Read our cannabis germinations and seedling, cannabis vegetative stage, and cannabis flowering stage guides for more detailed information about the proper values of these parameters in different growth stages.

About Bluelab company

Bluelab was founded in 2000 in New Zealand when CEO Greg Jarvis purchased the grower suppliers company NZ Hydroponics, which was selling just one electronic product. Since then, Bluelab won the award for Excellence in Innovation at the NZ International Business Awards and grew its revenue every year. Nowadays, the company manufactures various measurement tools and control systems for controlled environment agricultural growers.

Bluelab Combo Meter features

bluelab meter, ph probe and conductivity probe
Bluelab Combo Meter copyright Bluelab

As mentioned before, this handy tool will help you to measure pH, conductivity, and temperature in nutrient reservoirs, run-off, or water supplies. It can be used on the go when you need fast and accurate readings. 

pH (potential Hydrogen) – shows how alkaline or acidic your prepared solution for the plants or your medium is. It’s crucial, as it determines nutrient absorption by the plants.

Conductivity – shows the total amount of nutrients in your prepared solution. With this Bluelab Combo Meter, you can customize conductivity in EC, CF, PPM 500 (TDS), or PPM 700.

Temperature function – shows the results in °C or °F. It affects plants’ growth rate and structure. 

After a couple of months of usage

The tool itself is very comfortable, feels high-quality in hand. The process of using it is straightforward, and the calibration process is very simple as well, so you can be sure that the results will always be accurate. You have to be aware that the pH probe is made out of glass, so any, even the slightest, damage can lead the pH probe to deliver false results. The Bluelab carry case is a good solution. 


  • Easy and straightforward to use, clean and calibrate
  • High-quality product for long-life usage
  • Includes pH and conductivity probes
  • Includes 2m cable for measuring in hard-to-reach locations
  • With backlight display
  • Customization in different measurement units
  • Excelent customer service


  • Quite pricy tool (around $329)
  • Carry case not included
  • Non-rechargeable, uses replaceable batteries

Our verdict

It’s definitely a worth-having tool. This combo meter will last a long time and give you the most accurate fast results for your plants to stay healthy and strong.

Frequently Asked Questions (FAQs)

What is the best temperature for the cannabis nutrient solution?

Most growers admit that keeping it around 70°F (21°C) is that golden middle. Higher temperatures might damage the roots, and the whole plant will suffer.

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4.17 out of 5 (6 votes)

Charles Green

Charles is a long-time cannabis connoisseur and cultivator from California. As more and more states legalize cannabis, Charles writes guides, reviews and tips for cannabis home-growers using his priceless experience.

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