Bluelab pH PenPlus – Replaceable Probe pH & Temperature Meter
Minimise downtime, extend product life, and support confident decision-making. The Bluelab pH PenPlus (SKU: PENPLUSPH) delivers industry-leading pH accuracy with a replaceable double-junction probe — engineered for continuity in demanding grow environments. When natural probe wear occurs, simply swap the probe, not the whole pen. Less downtime, less disruption, continued confidence in every reading.
Built to IP68 dustproof and waterproof standards, the pH PenPlus is designed for long-term daily use in hydroponics, irrigation, runoff testing, and commercial growing operations. Includes calibration solutions and KCl storage solution right out of the box. Made in New Zealand by Bluelab.
What’s in the Box
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1× Bluelab pH PenPlus with replaceable pH & temperature probe
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1× pH 7.0 Calibration Solution (18 ml)
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1× pH 4.0 Calibration Solution (18 ml)
- 1× KCl Storage Solution
Key Features
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Replaceable Double-Junction pH Probe — screw-cap design for quick, tool-free probe swap; extend meter lifespan indefinitely
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IP68 Dustproof & Waterproof — built for demanding grow environments, daily submersion, and field use
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Hold-Reading Function — freeze the display for hands-free logging without losing your reading
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KCl-Filled Silicone Cap — internal sponge maintains probe hydration between uses for longer probe life
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Simple 2-Point pH Calibration with 30-Day Reminder — keeps readings accurate; built-in reminder ensures you never miss a calibration cycle
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Simultaneous pH & Temperature — reads both parameters on a bright backlit display
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Temperature in °C or °F — switch between Celsius and Fahrenheit to suit your region
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Integrated Lanyard & Waterproof Silicone Probe Cap — secure and protected in any environment
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Auto-Off Function — conserves battery life during extended use
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Compact Handheld Design — ergonomic form factor for field, greenhouse, and lab use
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Made in New Zealand — Bluelab’s decades of precision instrument manufacturing behind every unit
Why the pH PenPlus?
Healthy plant growth starts with the right pH. In hydroponic and irrigated systems, measuring runoff helps you understand root zone conditions — whether your nutrient solution is staying available to the plant or drifting too acidic or alkaline for efficient uptake. The pH PenPlus gives you the accuracy and durability to check pH early, make informed adjustments, and keep your crop in the optimal range — day after day, grow after grow.
Technical Specifications
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SKU: PENPLUSPH
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pH Range: 0.0–14.0 | Resolution: 0.1 | Accuracy: ±0.1 at 25°C / 77°F
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Temperature Range: 0–50°C / 32–122°F | Resolution: 1 | Accuracy: ±1°C / ±2°F
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Operating Environment: Solution 0.2 EC and above | 0–50°C / 32–122°F
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IP Rating: IP68 (dustproof & waterproof)
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Probe: Replaceable double-junction pH + temperature probe
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Calibration: 2-point pH calibration with 30-day reminder
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Power: 1× AAA alkaline battery
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Warranty: 2-year limited warranty; 6 months for the Bluelab pH ProbePlus
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Country of Origin: New Zealand
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Weight: 12 oz
Pro tip: Keep a spare Bluelab pH ProbePlus (replacement probe) on hand to eliminate downtime when probe wear occurs. Pair with additional Bluelab pH 4.0, pH 7.0, and KCl storage solution for a complete long-term maintenance kit.
