Getting Started: The Bluelab Combo Meter

Product overview and how to get started

Bluelab Combo Meter 1-medium-1


Measure pH, conductivity and temperature on the go. The Bluelab Combo Meter provides the ultimate convenience by taking care of all three nutrient uptake fundamentals simultaneously.

Not only that, but this multi-parameter meter and its probes feature a brilliantly simple design. The Bluelab pH Probe is easy to use, clean and calibrate; when the time comes, it’s also easy to replace. Likewise, the Bluelab Conductivity Probe has straightforward functionality, requiring no further calibration.

Five-year guarantee for the Bluelab Combo Meter; six-month guarantee for the Bluelab pH Probe.


Bluelab Combo Meter

Measures pH, conductivity/nutrient (EC, CF, ppm 500 and ppm 700) and temperature (°C, °F)

Lightweight and portable

Replaceable double junction pH probe

Large and easy to read display

Over range and under range indicators

Simple push button pH calibration

Low battery indicator. Auto off function

Successful pH calibration indicator

2x AAA alkaline batteries included

No calibration required for conductivity and temperature

2m cable for measuring in hard-to-reach location

Register your Combo Meter with Bluelab

Product manuals:

METCOM User Manual - English

METCOM User Manual - Spanish

METCOM User Manual - German Deutsch

METCOM User Manual - Dutch

METCOM User Manual - French

Get started with the Bluelab Combo Meter

  1. Insert batteries supplied
  2. Connect the pH Probe: Connect the pH probe to the pH meter by lining up the lugs of the BNC fittings. Fasten securely by pushing the pH probe connector on and twisting one-quarter turn.
  3. Press any button to turn the Bluelab Combo Meter on. The meter will automatically turn off after four minutes.
  4. Calibrate the pH probe before first use. Instructions are on the back of the meter. Learn more about calibration here
  5. Take your first measurement: Submerge the probe in your nutrient reservoir to view the readings on the display.

Tips for care

Clean and calibrate your probes monthly to maintain probe accuracy.

  • Always store the pH probe in the storage cap with enough KCl Storage Solution (Potassium Chloride) to cover the probe tip. The probe will become damaged if left dry. Read more about KCl Storage Solution.
  • The glass tube can be damaged easily. Take care not to knock the glass.
  • Don't immerse in oils, proteins or suspended solids that will leave a coating on the glass bulb. 
  • Never store or soak the pH probe in RO, distilled or deionised water.
  • Read the guide on how to clean your pH probe 

Other Resources

FAQ and Troubleshooting: Bluelab Combo Meter