BlueLab Guardian Monitor

MSRP:$364.00  Our Price: $307.45Save: $56.55

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Seasonal changes, sunlight hours, wind, inherent plant growth; from vegetative to fruiting; are all influencing factors to plant growth success. But more importantly, these parameters change the plants uptake and need of water and specific nutrient elements. The Bluelab Guardian is a constant indicator of the desired levels of EC, pH and temperature, enabling the grower to optimize these parameters as the crop progresses through each growing phase. The Bluelab Guardian removes the complexity of how each parameter relies on each other for outstanding growth. Our innovative monitor is a new method to help guard the success of your crops with immediate and accurate results. A flashing display lets you know if one parameter moves away from the ideal, allowing you to make the required adjustments quickly and effectively.


  • Adjustable brightness display
  • Large easy to read displays
  • Plant Safe' green LED display
  • Slectable values for conductivity and temperature Simple push button pH calibration
  • No calibration required for conductivity and temperature
  • Silent alarm for both high and low settings
  • Settings retained when power lost (non-volatile memory)
  • Temperature compensate
  • International power supply
  • Water resistant design

2 year guarantee (6 months for pH probe)

  • Model: BLU27100
  • Shipping Weight: 2lbs
  • Brand: Bluelab
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Q: What is the suggested pH range for my hydroponic system and soil plants?
A: Hydroponic and soil gardens differ in the fact they both need different pH ranges for nutrients to be made available for plant absorption. Maintain a pH between 5.0 and 6.5 for hydroponic gardens and 6.0 to 7.0 for soil applications.

Q: My pH meter doesn't hold calibration. How often should I recalibrate it?
A: pH meters do need to be calibrated by the user every day since the membrane does change and is affected by the temperature as well. If pH values are very critical then it will need to be recalibrated several times a day, or before each sample test (depending on how critical the value is). Uncontaminated calibration solution is very important as well. For each calibration, pour some solution in a separate container. Keep out of sunlight and away from heat.
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