The Bluelab Guardian Monitor is the simplest and most effective reservoir monitor you will ever own! It provides 24 hour continuous readings for pH, conductivity (EC/ppm/CF/TDS) and temperature from an aqueous solution. Monitoring and optimising these parameters is essential for successful plant growth.
Bluelab Guardian Monitors are designed for user practicality. They can be effectively used in recirculating or run-to-waste hydroponic systems or for a variety of water control purposes such as aquaponics or aquaculture.
Guardians feature plant-safe green LEDs so you can safely mount inside your cultivation facility without worry of disturbing a plants night cycle. Bluelab also incorporated a clever silent alarm system which lets you know if any parameters are unacceptably high/low using visual displays.
The Guardian Monitors are recognised worldwide for their reliability and accuracy, don’t risk a valuable crop using cheap imitations!
Features:
Plant-safe green LEDs
Large easy to read displays
No calibration required for conductivity and temperature
Simple push button pH calibration
Selectable values for conductivity and temperature
Flashing high and low alarms
Greater tolerance to RF / electronic interference provided
Water resistant design
International power supply included
Replaceable double junction pH probe included
Adjustable display brightness
Non-volatile memory (setting retained when power lost)
Couldn't load pickup availability
Free 30 day return policy
Quality product
Shipping available | Estimated Delivery time: 02 August 2025
Don’t leave your harvest to chance. At Greenhouse Factory, we supply the precision gear and professional-grade nutrients that turn average grows into high-yield successes. Whether you’re running a small home tent or a large-scale facility, we provide the expert-vetted inventory and technical knowledge you need to master your environment and maximize every plant’s potential.
Expert-Vetted Inventory
We don’t just stock shelves; we test every product we carry. From full-spectrum LED arrays to precision pH monitors, we only sell the brands that our experts trust in their own grows.
Nutrient Precision
Stop guessing your feed schedule. We carry a comprehensive range of professional hydroponic nutrients and additives designed to deliver the exact mineral balance required for every stage of growth.
Climate Control Command
The secret to a successful grow is consistency. Shop our advanced ventilation, dehumidification, and CO2 systems to maintain the "Goldilocks Zone" 24 hours a day, 365 days a year.
Immediate Availability
Your grow cycle doesn't have a "pause" button. We maintain deep stock levels on all essential growing media, replacement parts, and nutrients so you never have to worry about backorders.
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What People Say About Us
5
Finally, a shop that actually stocks the good stuff. Their nutrient selection is the best in the area, and I never have to worry about them being out of stock when my reservoir is low.
James H., Craft Cultivator
5
I was overwhelmed starting my first DWC setup. The team here walked me through exactly what I needed without overselling me. My first harvest was huge.
Mia R., Home Grower
5
Fast shipping and everything arrived discreetly packaged. This is my new go-to for all my indoor grow supplies.
Kevin S., E-commerce Customer
5
Best prices on LEDs I’ve found. They know the tech and helped me pick the right spectrum for my specific tent size.
Leo G., Hobbyist
Frequently Asked Questions
How long will it take to receive my order?
Most orders are processed within 1–2 business days. Standard shipping typically takes 3–7 business days depending on your location. Once your order ships, you will receive a tracking number via email so you can monitor your gear every step of the way.
Is your packaging discreet?
We value your privacy. All orders are shipped in plain, unmarked cardboard boxes with no mention of "Hydroponics" or "Grow Shop" on the exterior. The return address will simply list our parent company name to ensure your hobby or business remains your business.
Do you ship heavy or oversized items?
Yes! We specialize in shipping bulky items like lighting systems, grow media, and ventilation kits. If your order requires a liftgate or special delivery instructions, please contact our team before checkout.
What is your return policy for technical equipment?
We offer a 30-day return policy on most unopened, unused items. For technical equipment like LEDs or digital meters, we honor all manufacturer warranties. If a product arrives defective or damaged, please contact us within 48 hours of delivery so we can arrange a priority replacement.
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