Bluelab pH Pen Meter - Measures pH and Temperature

Handheld pH Management in a Pocket-Sized Waterproof Pen

The Bluelab pH Pen delivers accurate pH and temperature measurement in a compact, fully waterproof format. Whether you are checking reservoir pH, spot-testing feeding solutions, or monitoring irrigation water, the Bluelab pH Pen provides the fast, reliable readings needed to keep nutrient uptake at its best. Automatic temperature compensation, two-point calibration, and a hold reading function round out a feature set that punches well above its pocket-friendly size.

Key Features & Benefits

• Measures pH and temperature - Monitor two key solution parameters with one pocket-sized instrument.
• Automatic temperature compensation - Adjusts pH readings based on solution temperature for accurate, reliable results.
• Fully waterproof - Safe to submerge and easy to rinse clean after reservoir measurements.
• Two-point pH calibration - 30-day calibration indicator on screen reminds you when recalibration is due.
• Backlit LCD display - Clear readings in dimly lit greenhouse and grow room environments.
• Hold reading function - Lock the current reading on screen for easy recording without a second set of hands.
• Auto-off function - Conserves battery life automatically when the pen is not in use.

Who Should Use This

Growers, technicians, and hobbyists who need a reliable, affordable handheld pH meter for daily solution and reservoir monitoring. Ideal for operations where portability and simplicity are priorities.

Compatibility

Compatible with hydroponic nutrient solutions, irrigation water, and other liquid applications. Note: the pH probe in the Bluelab pH Pen is not replaceable. Calibrate using Bluelab pH 4.0 and 7.0 calibration solutions. One AAA battery included.

Frequently Asked Questions

Can the pH probe in this pen be replaced?

No - the double-junction pH probe in the Bluelab pH Pen is integrated and not replaceable. When the probe reaches end of life, the full pen should be replaced.

How often should this pen be calibrated?

The 30-day calibration indicator on the display reminds you when two-point recalibration is due, using Bluelab pH 4.0 and 7.0 calibration solutions.

Is this pen fully waterproof?

Yes - the Bluelab pH Pen is fully waterproof, making it safe to submerge in reservoirs and easy to rinse clean.

What battery does this pen use?

One AAA replaceable battery is included.