Bluelab Guardian Monitor - Combined pH and EC Meter

Bluelab Guardian Monitor is the simplest and most effective instrument for measuring pH, electrical conductivity and temperature of the nutrient solution in your reservoir.

• Large, easy-to-read display with green backlight
• Does not require calibration of the electrical conductivity/temperature probe (factory calibrated)
• Easy one-button pH calibration
• Selectable conductivity and temperature units (EC, CF, TDS, ppm700 and °C, °F)
• Flashing alarms for low or high values
• Included Bluelab pH Probe replaceable probe
• Adjustable display brightness
• Non-volatile memory (settings are retained in the event of a power loss)
• Water-resistant design
• 2-year instrument warranty
• 6-month warranty on the Bluelab pH Probe probe

Measurement range:

• pH: 0.0 - 14.0
• EC: 0.0 - 5.0
• temperature: 0 - 50°C 

Measurement accuracy (at 25°C):

• pH: ± 0.1
• EC: ± 0.1
• Temperature: ±1°C

Bluelab Guardian Monitor provides 24-hour continuous readings of pH, electrical conductivity (EC/ppm 700/TDS/CF) and temperature in nutrient solution. Optimising these critical parameters during plant growth helps ensure a successful harvest. Designed for indoor growing, the Bluelab Guardian Monitor can be wall-mounted or hung on a stand. Simply place the pH and conductivity probes in the solution and monitor the data on the display. Set low or high alarms — if solution levels move outside the ideal range, the display flashes. With one quick look at the Bluelab Guardian Monitor, you will know when your nutrient solution needs adjustment.