VIVOSUN AeroLab P30 pH Pen – pH Tester for Hydroponics

Lab-Grade pH Readings in a Pocket Pen

The VIVOSUN AeroLab P30 pH Pen gives fast, stable pH readings to ±0.01 pH across the full 0.00–14.00 range, with automatic temperature compensation (ATC) so readings hold steady as your nutrient solution warms or cools. It suits hydroponic reservoirs, DWC, NFT, drip and ebb-and-flow systems, as well as aquariums and general water testing.

Key Benefits

• ±0.01 pH accuracy from a high-sensitivity, double-junction glass electrode
• One-touch auto calibration at 1, 2 or 3 points, recognising both NIST (4.01/6.86/9.18) and USA (4.00/7.00/10.01) buffers
• Replaceable probe – swap the electrode instead of replacing the whole meter
• IP67 waterproof and floats, so a drop in the tank is not the end of it
• Backlit LCD with auto and manual hold – lock a reading and read it out of the water
• Adjustable auto power-off to save battery life

Why Is My pH Drifting?

Nutrient uptake is only reliable inside a narrow pH window, and a solution that drifts even half a point can lock out calcium, magnesium or iron long before leaves show it. A cheap pen that wanders between readings makes that impossible to catch. A calibrated, temperature-compensated meter lets you dose pH up or down with confidence and keep the root zone in range.

How to Use

• Calibrate first: mix a buffer sachet into 250ml of distilled water, press and hold CAL and the pen confirms each point automatically
• Test: remove the cap, dip the probe into the solution and wait for the reading to settle, or press HOLD to lock it
• Rinse and store: rinse the probe after use and keep the cap on with the moist sponge in place so the electrode stays hydrated
• Recalibrate regularly, and whenever readings look unstable