Description
Aquamaster pH Temp Meter P50 Pro is a professional digital pH and temperature meter from Aquamaster, providing precise, calibrated pH readings for nutrient solution and growing medium management in hydroponic and soil cultivation environments. We have been recommending Aquamaster measurement instruments to UK growers since 2017 as a reliable, accurate and well-constructed pH testing solution for the serious indoor cultivator who needs dependable measurements every time.
Precision pH Measurement for Confident Nutrient Management
The Aquamaster P50 Pro delivers pH measurements with resolution to 0.01 pH and accuracy of ±0.05 pH — precision that is more than adequate for the grow room management tasks that matter most. At this resolution, you can clearly distinguish between pH 5.9 and 6.1, and make targeted adjustments that hit your target pH reliably rather than approximately. The built-in automatic temperature compensation (ATC) adjusts readings for solution temperature variation, ensuring accuracy across the range of temperatures encountered in grow room environments where reservoir temperature may fluctuate with ambient conditions.
The P50 Pro features a clear digital display and ergonomic waterproof housing suited for regular use in the humid conditions of an active grow room. The waterproof design protects the electronics from the splashing and humid air that are unavoidable in daily grow room work, extending instrument service life beyond that of non-waterproof alternatives that gradually fail from moisture ingress over time.
Calibration and Maintenance
Perform two-point calibration using Aquamaster pH 4.0 and pH 7.0 certified buffer solutions at the start of each growing cycle and whenever readings appear inconsistent. Rinse the electrode with clean water after each use, and store the electrode cap filled with Aquamaster storage solution to keep the glass membrane active and responsive between uses. Replace the electrode (using the P50 replacement electrode) when calibration can no longer be achieved within acceptable limits — typically every 12–24 months under regular use.
Pairs with Aquamaster pH 4.0 and 7.0 buffer solutions and storage solution for a complete pH testing and maintenance setup. A professional-grade instrument for UK growers who need reliable, accurate pH measurement as the foundation of their nutrient management programme.







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