Bluelab pH PenPlus – Digital pH & Temperature Meter with Replaceable Probe - New Zealand

Accurate pH testing. Replaceable probe. Built to last.

The Bluelab pH PenPlus is a professional digital pH and temperature meter designed for growers who demand reliable measurements, durability and long-term value.

Unlike conventional pH pens that may require complete replacement when the sensor wears out, the Bluelab pH PenPlus features an innovative replaceable pH and temperature probe. Simply replace the probe when necessary to restore measurement performance, reduce downtime and extend the useful life of your instrument.

Engineered for demanding growing environments, the pH PenPlus combines a double-junction pH probe, IP68 waterproof construction, automatic temperature compensation and a clear backlit display.

Whether you're managing hydroponic nutrient solutions, monitoring irrigation water or checking runoff, the Bluelab pH PenPlus helps you maintain the right conditions for healthy plant growth and efficient nutrient uptake.

Key Features & Benefits

• Replaceable pH & Temperature Probe – Extend the instrument's useful life without replacing the entire pen.

• Double-Junction pH Probe – Designed to deliver stable and reliable pH measurements.

• Measures pH & Temperature – Monitor two essential growing parameters in one compact handheld instrument.

• IP68 Waterproof & Dustproof – Durable construction for wet grow rooms, greenhouses and commercial growing environments.

• Automatic Temperature Compensation (ATC) – Compensates for temperature changes to support accurate pH readings.

• Bright Backlit LCD Display – Easy to read in low-light conditions.

• Simple Two-Point Calibration – Calibrate using pH 7.0 and pH 4.0 or pH 10.0 solutions.

• 30-Day Calibration Reminder – Helps maintain consistent measurement accuracy.

• Hold Reading Function – Conveniently retain measurements on screen.

• Easy Screw-Cap Probe Replacement – Quick and convenient probe replacement.

• Protective KCl Storage Cap – Helps keep the pH probe hydrated and ready for use.

• Automatic Power-Off – Conserves battery life.

Why Choose the Bluelab pH PenPlus?

Replace the Probe, Not the Entire Pen

The replaceable sensor design makes the pH PenPlus a practical long-term investment. When the probe reaches the end of its service life, simply install a compatible Bluelab pH ProbePlus replacement probe.

Reliable Measurements for Better Growing Decisions

Correct nutrient solution pH is essential for nutrient availability. Regular pH monitoring allows growers to identify imbalances early and make timely adjustments.

Designed for Everyday Professional Use

Its IP68-rated waterproof and dustproof housing makes the pH PenPlus suitable for frequent testing around irrigation systems, nutrient tanks and greenhouse environments.

Ideal For

• Hydroponic growing systems

• Nutrient reservoir monitoring

• Greenhouse and nursery operations

• Commercial horticulture

• Irrigation water testing

• Nutrient solution preparation

• Runoff pH monitoring

• Indoor growing and controlled-environment agriculture

Technical Specifications

What's Included

• 1 × Bluelab pH PenPlus with replaceable pH and temperature probe

• 1 × Bluelab pH 7.0 Calibration Solution Sachet (18 mL)

• 1 × Bluelab pH 4.0 Calibration Solution Sachet (18 mL)

• 1 × Bluelab KCl Storage Solution Sachet (18 mL)

Care & Maintenance

To maintain accurate measurements, calibrate regularly using the recommended Bluelab calibration solutions and keep the sensor hydrated with KCl storage solution.

Never store the pH probe dry or in distilled water. Replace the probe when necessary using the compatible Bluelab pH ProbePlus.

Bluelab pH PenPlus – Professional pH measurement with the flexibility of a replaceable probe.