Aqua Master S300 Pro3 – pH and Temperature Meter for Substrate (3d generation)The Aqua Master S300 Pro3 is a precise and modern meter designed to measure pH and temperature in soil, coco, and other moist growing media. With its solid construction and high measurement accuracy, it allows easy monitoring of cultivation conditions and helps ensure optimal growth for your plants.Equipped with a clear LCD display, Automatic Temperature Compensation (ATC), and two-point pH calibration (4.00 and 7.00), the S300 Pro3 provides fast, reliable, and consistent readings. Its IP65-rated waterproof housing protects the device from moisture, while the IP67-rated probe can safely be used directly in the substrate.The meter features an auto shut-off function after 8 minutes of inactivity and a calibration reminder every 30 days, making it easy to maintain measurement accuracy. The replaceable electrode and AAA battery power supply make it a practical and cost-effective tool for both professional and hobby growers.Key Features:Measures pH (0.00–14.00) and temperature (0–50°C)Automatic Temperature Compensation (ATC)Two-point calibration (pH 4.00 and 7.00)Replaceable electrode for easy maintenanceWaterproof design: IP65 (housing) / IP67 (probe)Clear LCD display with HOLD functionAuto shut-off after 8 minutes of inactivityCalibration reminder every 30 daysPower supply: 2 × AAA batteriesTechnical Specifications:ParameterValuepH range0.00 – 14.00 pHTemperature range0 – 50°CpH accuracy±0.10 pHTemperature accuracy±0.50°CCalibrationAutomatic, 2-point (4.00 and 7.00)Temperature compensationAutomatic (ATC)Waterproof ratingIP65 (meter) / IP67 (probe)Power supply2 × AAA batteriesAuto power-offAfter 8 minutesDimensions230 × 43 × 43 mmWeight158 gThe Aqua Master S300 Pro3 combines precision, simplicity, and durability in one device — the perfect choice for both professional cultivators and home growers who need accurate pH and temperature monitoring in their growing media.





