Bluelab Guardian Monitor (Conductivity / Temperature / pH)


Sale price£359.99

Bluelab Guardian Monitor (Conductivity / Temperature / pH)

When growing hydroponically, it's essential to carefully monitor reservoirs to ensure that nutrients of the right strength, temperature and pH are delivered to your plants. The Bluelab Guardian is an all-in-one solution to monitoring every essential parameter. Should levels ever drop below, or rise above, pre-determined values, then the easily programmed visual alarm system kicks into action to alert you to the situation - allowing you to solve minor issues before they become major issues!

How the Bluelab Guardian Monitor Works

Growing hydroponically requires the careful monitoring of a few key nutrient parameters. The values of these parameters can be the difference between a successful grow and a completely failed crop, such is their level of importance.

The Bluelab Guardian monitors temperature in centigrade or Fahrenheit, conductivity in terms of EC / CF / TDS / ppm, and also pH levels – and it does it consistently and accurately, with the use of scientific grade external probes. The Guardian will even provide a visual alert should levels drop below, or rise above, pre-programmed values – minor issues can then be dealt with before they become major issues.

Many plants flower as a result of changes in the number of hours of uninterrupted darkness they're exposed to. The display LEDs on the Guardian glow in a plant-safe green that won't disturb dark periods and cause unwanted issues.

Differences in the temperature of nutrient solutions can effect pH and EC readings. Because the Bluelab Guardian incorporates a thermometer into its conductivity probe, the data it gathers is used to provide fully temperature compensated pH and EC readings, providing you with the most reliable information possible.

So confident are Bluelab in this product's robustness, that every Guardian comes supplied with a two year guarantee. Only the pH probe is exempt, due to the delicate nature of its glass parts, yet even this still comes with a guarantee of 6 months.

To see our full Meters range, click here


  • Bluelab – raising the industry standard
  • Provides consistent, highly accurate readings
  • Unsurpassed build quality
  • Simple alarm system alerts you to drops / increases in read-outs
  • Supplied with a two year guarantee
  • Bold, easily readable LED display
  • Green display doesn't compromise light cycles
  • Water resistant main unit
  • Automatically compensates for temperature differences

You may also like

Recently viewed