Bluelab Guardian Monitor

In stock online
Standard Delivery £6.95*
Next Day Delivery* Next Day Delivery*
Plain Packaging Used Plain Packaging Used
Click and Collect Click and Collect
Product Name Qty Price
Bluelab Guardian Monitor


The Bluelab Guardian Monitor measures pH, conductivity and temperature. It is a constant indicator of the desired levels of pH, EC/ppm 700/TDS/CF and temperature, enabling you to optimise these critical parameters through each growth stage. 

It has a large easy to read display. It is mains powered and can be mounted to the wall or hung on a support with the probes simply placed into the reservoir.

The Bluelab Guardian Monitor monitors 24 hours a day and has the ability to set high and low alarms, a flashing display lets you know when one parameter moves from the ideal, allowing you to make quick and effective adjustments.


  • Plant-safe green LEDs
  • For pH calibration simple push button. No calibration is required for conductivity and temperature.
  • Selectable values for conductivity and temperature
  • Replaceable double junction pH probe
  • Adjustable display brightness
  • Water resistant design
  • Non-volatile memory
Delivery & Returns
Next Day Delivery 12 Noon
Next Day Delivery
In a hurry for your order? Order before 1 pm Mon - Thurs for next working day delivery *subject to stock availability T&C's apply.
Different delivery address?
Different delivery address?
Do your goods need shipping to an alternative address? If so, paying by bank transfer gives you the freedom to have them delivered to anywhere in the UK.
Free Returns
Free Returns
Faulty or damaged item? No problem, contact us on 0800 038 7100 or and we can arrange a free collection.
Plain Packaging
Plain Packaging
All parcels, no matter how big or small, are dispatched in plain packaging using black wrap that's secured using 'fragile' tape.
How to Pay
Credit / Debit Cards
We accept all major credit and debit cards (excl. American Express) All transactions are processed using a secure server via SagePay. Please note: When paying by credit card we can only ship to the card statement address.
Simply select this option at checkout if you prefer to pay through PayPal. Please note: When paying by PayPal, we can only ship items to the account owners confirmed address.
Banks Transfer
Select the option for Bank Transfer at checkout if you wish to receive your item anywhere within the UK. Please use your order number as payment reference.
Click & Collect
Collect your online orders from 3 of our 4 stores in as little as under an hour*! Simply pay online, choose location & collect in-store for free! Available from Manchester & Huddersfield (*subject to stock availability).
Brand Bluelab

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