Bluelab Guardian Monitor Wi-Fi – Continuous pH, EC and Temperature Monitoring for Hydroponics

The Bluelab Guardian Monitor Wi-Fi is a professional nutrient solution monitoring system designed to continuously measure pH, electrical conductivity (EC), and temperature in hydroponic reservoirs. By providing real-time measurements, it helps growers maintain appropriate nutrient conditions without relying exclusively on manual testing.

Featuring built-in Wi-Fi connectivity and integration with the Edenic by Bluelab app, the Guardian Monitor allows growers to check reservoir conditions remotely, receive alerts, and review historical measurements from a compatible device.

Its large, plant-safe green LED display provides clear, continuous readings, while adjustable alarm limits help identify changes that may require attention.

Designed for hydroponic growing systems, indoor cultivation facilities, commercial greenhouses, and recirculating nutrient reservoirs, the Bluelab Guardian Monitor Wi-Fi makes routine nutrient solution monitoring more convenient and consistent.

Continuous Monitoring of pH, EC and Temperature

Maintaining appropriate nutrient solution conditions is important for healthy plant development. Changes in fertilizer concentration, water quality, and nutrient uptake can affect the balance of a hydroponic reservoir.

The Bluelab Guardian Monitor Wi-Fi continuously measures three essential parameters:

pH Measurement

The replaceable Bluelab pH Probe measures solution acidity and alkalinity, allowing growers to identify changes that may affect nutrient availability.

The monitor measures pH from 0.0 to 14.0, with an accuracy of ±0.1 pH at 25°C.

Electrical Conductivity (EC)

The conductivity probe measures dissolved ion concentration, providing an indicator of nutrient solution strength.

Readings can be displayed in EC, CF, ppm 500 (TDS), or ppm 700, depending on the preferred measurement scale.

Temperature Measurement

The integrated temperature sensor monitors nutrient solution temperature from 0 to 50°C (32 to 122°F).

Monitoring temperature helps growers identify reservoir conditions that may influence root health and nutrient management.

Wi-Fi Connectivity and Edenic Monitoring

The Guardian Monitor Wi-Fi connects to the Edenic by Bluelab app, providing convenient access to reservoir measurements beyond the growing area.

Compatible features include:

• Remote Monitoring: View current pH, conductivity, and temperature readings.
• Alarm Notifications: Receive alerts when measurements exceed configured limits.
• Historical Reports: Review previous data to identify changes and trends.
• Remote Alarm Settings: Adjust supported alarm parameters through the app.
• Data Management: Keep a digital record of nutrient solution conditions.

Wi-Fi functionality can be enabled or disabled according to the requirements of the installation.

The monitor also features non-volatile memory, allowing programmed settings to be retained after a power interruption.

Key Features and Benefits

• Continuous Three-Parameter Monitoring: Tracks pH, EC, and temperature in nutrient reservoirs.

• Built-In Wi-Fi: Provides access to remote monitoring and notifications through Edenic.

• Large Green LED Display: Plant-safe illumination with adjustable brightness.

• High and Low Alarms: Helps identify measurements outside selected operating ranges.

• Replaceable pH Probe: Supports long-term use without replacing the complete monitoring unit.

• Multiple Conductivity Scales: Displays EC, CF, ppm 500, and ppm 700.

• Easy pH Calibration: Supports calibration using standard pH reference solutions.

• Power-Loss Memory: Preserves programmed settings when electrical power is interrupted.

• Wall-Mounted Design: Suitable for permanent monitoring installations.

• Mains-Powered Operation: Provides continuous monitoring without routine battery replacement.

Installation and Setup

The Bluelab Guardian Monitor Wi-Fi is designed for straightforward installation near a hydroponic nutrient reservoir.

Step 1 – Mount the Monitor

Install the monitor on a wall or suitable support where the display can be viewed easily and the probe cables can reach the reservoir.

Step 2 – Connect and Position the Probes

Connect the supplied pH probe to the monitor and position both the pH and conductivity/temperature probes in the nutrient solution.

Use the supplied suction-cup holder to secure the pH probe in an appropriate location.

Step 3 – Connect the Power Supply

Attach the appropriate power plug adapter and connect the monitor to a compatible electrical outlet.

Step 4 – Calibrate the pH Probe

Calibrate the pH probe using fresh pH 7.0 and pH 4.0 calibration solutions, following Bluelab's instructions.

Step 5 – Configure the Display and Alarms

Select the preferred conductivity and temperature units, adjust display brightness, and establish high and low alarm limits.

Step 6 – Connect to Edenic

Download the Edenic app, add the monitor, and follow the setup instructions to establish Wi-Fi connectivity and enable supported remote features.

Important: Position the monitoring probes according to Bluelab's instructions and maintain a reliable Wi-Fi signal if remote monitoring is required.

Technical Specifications

Measurement accuracies are specified at 25°C (77°F).

What's Included?

The standard Bluelab Guardian Monitor Wi-Fi package includes:

• 1 × Bluelab Guardian Monitor Wi-Fi with conductivity/temperature probe
• 1 × Bluelab pH Probe
• 1 × Bluelab pH Probe Holder with Suction Cup
• 1 × International Power Supply
• 4 × Interchangeable Plug Adapters (North America, Europe, UK, and Australia/New Zealand)
• 4 × Mounting Screws
• 2 × Cable Ties
• 1 × 18 mL Bluelab pH 7.0 Calibration Solution Sachet
• 1 × 18 mL Bluelab pH 4.0 Calibration Solution Sachet
• 1 × 18 mL Bluelab KCl Storage Solution Sachet

Maintenance and Probe Care

Regular maintenance helps preserve the accuracy and reliability of continuous monitoring.

Clean and calibrate the pH probe according to Bluelab's recommendations, using fresh calibration solutions. Inspect the conductivity/temperature probe regularly and remove accumulated nutrient deposits with approved cleaning methods.

The pH electrode must remain hydrated. When removed from the reservoir, store it using appropriate KCl storage solution rather than distilled or reverse-osmosis water.

Check probe placement periodically to ensure the sensors remain properly immersed and are not affected by excessive residue buildup.

The replaceable Bluelab pH Probe allows growers to renew the pH sensor when necessary without purchasing an entirely new monitor.

Frequently Asked Questions About the Bluelab Guardian Monitor Wi-Fi

Does the Bluelab Guardian Monitor Wi-Fi automatically adjust pH or nutrient levels?

No. The Guardian Monitor Wi-Fi is a monitoring instrument. It displays measurements and provides alerts but does not include dosing pumps. Automatic adjustments require a separate compatible controller and dosing system.

What is the difference between the Guardian Monitor Wi-Fi and Guardian Monitor Inline Wi-Fi?

The standard model uses probes immersed directly in a nutrient reservoir. The Inline version uses specialized probes installed within irrigation or nutrient delivery lines.

Can the Bluelab Guardian Monitor Wi-Fi operate without an internet connection?

Yes. The monitor can display measurements and provide its local monitoring functions without Wi-Fi. An internet connection is required for Edenic remote monitoring and notifications.

Does the conductivity probe require calibration?

According to Bluelab, routine calibration is not required for the conductivity/temperature probe. Regular cleaning remains important for maintaining reliable measurements.

Can the pH probe be replaced?

Yes. The Guardian Monitor Wi-Fi uses a replaceable Bluelab pH Probe with a BNC connection.

Is the Bluelab Guardian Monitor Wi-Fi suitable for commercial hydroponics?

Yes. Its continuous monitoring, configurable alarms, and remote access make it suitable for commercial greenhouses, indoor cultivation facilities, and other hydroponic operations requiring regular nutrient reservoir monitoring.