Bluelab PH Probe

The Bluelab pH Probe is a professional-grade replacement electrode designed for continuous monitoring and spot-checking of acidity levels across hydroponic reservoirs, fertigation tanks, and liquid nutrient solutions. Keeping track of pH is essential for plant vitality - imbalanced root zones block essential macro and micronutrient uptake, leading to leaf yellowing, stunted growth, and reduced yield potential.

Built using advanced double-junction reference technology, the probe utilises an additional internal salt bridge to shield reference wires from contamination caused by heavy mineral salts and organic compounds in nutrient solutions. Encased in a durable polycarbonate housing with a gel-filled reference, this design significantly extends probe lifespan and maintains high accuracy over long operational cycles.

Featuring a universal BNC connector and a generous 2-metre waterproof cable, the Bluelab pH Probe connects seamlessly as a direct replacement or backup electrode for the Bluelab Guardian Monitor, Combo Meter, pH Controller, and Pro Controller. Completely waterproof and submersible, it provides fast, stable pH readings in nutrient solutions with conductivity levels from 0.2 EC and above.

Key Benefits:

• Universal BNC Connection: Plugs directly into all BNC-compatible Bluelab hardware including the Guardian Monitor, Combo Meter, and pH Controller.

• Double-Junction Technology: Features an extra reference chamber to resist chemical fouling and mineral salt contamination for extended probe lifespan.

• Fully Waterproof & Submersible: Fully sealed polycarbonate housing allows safe, continuous submersion in nutrient reservoirs.

• Long 2-Metre Cable: Provides ample reach across large grow tents, reservoir stands, and greenhouse benches without straining connections.

• Fast & Accurate Measurements: Delivers stable, precise pH readouts within seconds in solutions of 0.2 EC and above.

• Protective Storage Cap Included: Comes complete with a protective cap to hold KCl storage solution during storage and transit.

Product Specifications:

• Brand: Bluelab

• Connector Type: Standard BNC

• Probe Junction: Double Junction Gel-Filled

• Housing Material: Polycarbonate

• Cable Length: 2 Metres

• Operating Range: 0.2 EC and above

• Lifespan: Approx. 12 Months (with proper maintenance and hydration)