Bluelab PROBPH pH Probe for Water - Precise Hydroponic pH Control

Our review of the Bluelab PROBPH pH Probe for Water finds it aimed at growers who need reliable, accurate pH readings in nutrient solutions. The single biggest reason to consider this probe is its double junction design, which reduces contamination and extends lifespan compared with single-junction pens and strips. It is supplied as a kit with a 2 m / 6.56 ft cable, BNC connector, probe holder and storage cap, so it plugs into compatible Bluelab meters and controllers for continuous monitoring in tents, reservoirs or water tanks.

Key Features

• Double junction probe: Offers improved resistance to contamination for more reliable long-term pH readings in nutrient solutions.
• 2 m cable with BNC connector: Provides a 6.56 ft reach that fits common setups and connects to Bluelab meters and controllers without adapters.
• Fully waterproof construction: The probe and cable joint are sealed so the unit can be used around wet reservoirs and humid grow tents without immediate failure.
• Easy calibration: Calibration is straightforward, helping growers maintain accuracy with routine two- or three-point calibration routines.
• Maintenance-friendly: Supplied with a storage cap and probe holder and is easy to clean, which helps maximize working life.
• Kit ready: Includes cable, holder, storage cap and BNC connector so users can install it with compatible Bluelab equipment right away.

Who It's For

This probe is best for hydroponic hobbyists and small commercial growers who already use or plan to use Bluelab meters and controllers and need accurate pH monitoring in nutrient solution, reservoirs or water tanks. It suits setups where a waterproof probe with a longer lifespan than single-junction pens is important.

It is less appropriate for gardeners who require extremely long-term industrial service without periodic replacement or those who need a standalone handheld pen with an integrated display; this probe is designed to work as a replacement electrode with meters and controllers rather than as a self-contained meter.

Pros & Cons

Pros

• Reliable accuracy from the double junction design compared with strips or drops.
• Ready-to-install kit includes cable, holder and BNC connector for quick replacement.
• Waterproof construction and easy maintenance reduce downtime in wet environments.

Cons

• Some users report calibration or early failure issues, so occasional replacements may be needed.
• Not a self-contained meter; it requires a compatible Bluelab tester, meter or controller to display readings.

Specifications

Product type	Replacement pH probe / electrode
Probe design	Double junction
Cable length	2 m / 6.56 ft
Connector	BNC connector
Included items	Cable, probe holder, storage cap, BNC connector
Waterproofing	Fully waterproof including cable joint
Warranty	6-month limited warranty with proof of purchase

Our Verdict

The Bluelab PROBPH probe is a solid choice for growers who need accurate pH control in hydroponic nutrient solutions and who already use compatible Bluelab equipment. Its double junction design and waterproof build offer clear advantages over disposable pens and strips, but buyers should be prepared for routine calibration and possible replacement if calibration problems arise.

Frequently Asked Questions

Can this probe be used with any meter?
The probe uses a BNC connector and is intended for Bluelab meters and compatible devices; check your meter for BNC compatibility before purchasing.

Does the kit include a care solution?
The kit includes cable, holder and storage cap; the probe care kit and specific storage solution are sold separately.

How long does the probe last?
The double junction design reduces contamination and extends life versus single-junction probes, but actual lifespan varies with use, maintenance and calibration practices.