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Bluelab Guardian Monitor



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Bluelab Guardian Monitor: 24/7 Vigilance for Thriving Plants

Monitor Your Key Parameters 24/7

Effortless Plant Care

Gardening should be a joy, not a chore. With the Bluelab Guardian Monitor, your plant care becomes a breeze. Say goodbye to manual measurements and spot checks; instead, embrace continuous monitoring of pH, EC, and temperature. It's time to reclaim your time and effort.

Spotting Fluctuations, Solving Issues

Consistency is the key to plant health. By tracking the essential parameters of nutrient uptake around the clock, you'll quickly identify any deviations. Address issues as they arise, ensuring your plants thrive. When you maintain these parameters, you ensure the health of your plants.

Your Key Parameters – At a Glance

Crystal-Clear Monitoring

The Bluelab Guardian Monitor boasts a large backlit LED display that provides instant access to your pH, EC, and temperature readings. Bold, bright, and always on, this display simplifies your monitoring routine.

Visual Alarms for Peace of Mind

Customize your monitoring experience with discreet visual alarms set to your preferred parameter ranges. Stay informed and in control. When your parameters drift out of range, you'll be the first to know. Say goodbye to surprises and hello to peace of mind.

Built for Growers, by Growers

Durability You Can Trust

Our products are designed with growers, for growers, right here in New Zealand. Your Bluelab Guardian Monitor is water-resistant, built to withstand the splashes and demands of everyday gardening. Crafted with care from a mix of local and imported components, it's a reliable partner in your plant care journey.

How to Maintain Your Bluelab Guardian Monitor

Stay Connected to Your Parameters

Monitoring should be hassle-free. For conductivity and temperature, no calibration is needed. However, for your pH probe, regular calibration is essential. Stock up on the essentials with the Bluelab Probe Care Kit, ensuring your monitor remains accurate and reliable.

Elevate Your Monitoring with Guardian Monitor Connect

If remote access to your plant parameters is on your wishlist, consider upgrading to the Bluelab Guardian Monitor Connect. Our free Connect software keeps you linked to your crops 24/7. Not only can you monitor real-time data from your on-site Bluelab products, but you'll also receive instant notifications for any alarms you've set up. Get connected today and enjoy unparalleled convenience.


  • Measurement Range:
    • 0.0 – 14.0 pH, 0.0 – 5.0 EC, 0 – 50 CF
    • 0 – 2500 TDS (EC x 500)
    • 0 – 3500 ppm (EC x 700)
    • 0 – 50 ̊C / 32 – 122 ̊F
  • Resolution: 0.1 pH, 0.1 EC, 1 CF; 10 TDS, 10 ppm 1 ̊C / 1 ̊F
  • Accuracy at 25̊C / 77̊F:
    • ± 0.1 pH, ± 0.1 EC, ± 1 CF; ± 50 TDS, ± 70 ppm;
    • ± 1 ̊C / ± 2 ̊F
  • Automatic Temperature Compensation Yes, if conductivity probe is in same solution as pH probe
  • Operating Environment: 0 – 50 ̊C / 32 – 122 ̊F
  • Calibration: Not required for conductivity or temperature. pH requires two point, pH 7.0 & pH 4.0 or pH 10.0 calibration
  • Power Source: International power supply
  • Certifications: CE and FCC
  • Two year free repair or replacement guarantee.
  • Six months for pH Probe.

In The Box

  • [1] x BlueLab Guardian Monitor

2-Year Replacement Warranty For Bluelab Guardian Monitor

  • If the product is faulty within the warranty period, the product will be replaced with a new one.
  • Please send the product to the following address on the contact us page.

6-Month For Phobes Replacement Warranty

  • If the product is faulty within the warranty period, the product will be replaced with a new one.
  • Please send the product to the following address on the contact us page.