Bluelab Guardian - continuous pH and Ec monitor


About this product

Bluelab Guardian monitor lets you measure the most important parameters of the nutrient solution, i.e. pH, Ec and temperature.

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Guardian is an all-in-one monitor by Bluelab. With a simple glance at the LCD screen you'll know the values of the different parameters in real time. Submerge the probe in the nutrient solution tank and monitor the values of the main parameters immediately and with no interruptions. 

It measures 24/24 h. It will provide you with readings of pH, Ec, TDS, PPM, CF and temperature. It has been specifically designed for indoor settings and can be mounted directly on the wall or on a support bar.

If one of the parameters' value falls too far from the appropriate range, the screen will start blinking to warn you about this anomaly.

It is calibrated at two different points with pH7 and pH4 liquids. It does not use any liquid for Ec.

Advantages of using this device:

  • there is no need to take measurements at given times.
  • smaller risk of lost harvest.
  • smaller risk of diseases due to nutrient imbalance or wrong pH levels.

Its different alarms and settings let you grow with peace of mind. Bluelab Guardian works for you. 


  • Green LEDs: "Plant-safe".
  • Large screen for comfortable reading.
  • It doesn't require calibration for conductivity or temperature.
  • Button for automatic pH calibration.
  • Adjustable values for conductivity and temperature.
  • Adjustable alarms.
  • Waterproof design.
  • International power adaptor.
  • Replaceable double junction pH probe.
  • Adjustable screen brightness.
  • Loss-free memory (even if the power is cut)

Product details

Category pH and Ec meters Reference Monitor Bluelab Guardian EAN13 07055005 UPC 24

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