Bluelab pH Probe – Replacement Probe for Guardian, Combo Meter & pH Pen

Although Bluelab products are built to last, any damage or long-term deterioration of the pH probe used by the Bluelab Guardian Monitor, Bluelab Combo Meter, and Bluelab pH Pen will eventually create the need for a replacement. This genuine Bluelab pH Probe connects to all of the above meters, so you can restore accurate readings without replacing the whole unit.

Built to Last

The probe is fully waterproof, easy to clean, and less fragile than traditional glass electrodes thanks to its tough polypropylene barrel — a significant durability advantage for anyone working around grow rooms, reservoirs, or wet environments.

Flexible Installation

It comes with a two metre cable and a suction cup, giving you the option of permanently submerging the probe in your tank or reservoir for continuous monitoring, rather than needing to take manual spot readings.

Key Features

• ✅ Genuine replacement probe for Bluelab Guardian Monitor, Combo Meter, and pH Pen
• ✅ Fully waterproof
• ✅ Easy to clean
• ✅ Tough polypropylene barrel — less fragile than glass electrodes
• ✅ 2 metre cable included
• ✅ Suction cup included for permanent submersion
• ✅ Compatible with continuous or spot-check monitoring setups

Maintenance

Requires regular calibration with a pH buffer solution to maintain accuracy levels over time.

Product Specifications

Perfect For

Bluelab meter owners needing a genuine replacement probe due to damage or wear, or growers wanting the option to permanently submerge a probe in their reservoir for continuous pH monitoring.