Aquamaster S300 Pro 2 Substrate pH & Temperature Meter

🌱 The Most Accurate Substrate pH Meter for Serious Growers

Stop guessing what's happening in your growing media. The Aquamaster S300 Pro 2 is a professional-grade handheld pH and temperature meter built specifically for soft, moist substrates — coco coir, rockwool, soil, and more. Get instant, reliable readings right where it matters most: at the root zone. 🌿

✅ Why Growers Choose the S300 Pro 2

• 📐 Extreme accuracy — ±0.1 pH and ±0.5°C so you always know exactly what's going on
• 🌡️ Dual pH + temperature readings — two critical metrics in one tool
• 🔌 90cm electrode cord — reach deep into grow bags, slabs, and pots with ease
• 🎯 2-point auto calibration — quick, simple, and reliable at 4.0 and 7.0 pH
• 🤚 Ergonomic rubber grip — comfortable to use during long grow room sessions
• 🔁 Replaceable probe — extend the life of your meter, not just the electrode
• 💧 IP65 waterproof body / IP67 waterproof electrodes — built tough for wet environments
• 🔋 Batteries included — ready to use straight out of the box
• ⏱️ Auto power-off after 8 minutes — saves battery life automatically

🌿 Perfect For

• Coco coir, rockwool, perlite & soil substrate growers
• Hydroponic and aeroponic systems
• Commercial horticulture and agriculture
• Food production and quality testing
• Home grow tents and hobby growers who want pro-level accuracy

📋 Full Specifications

• pH Range: 0.0 – 14.0 pH
• Temperature Range: 0°C – 50°C (32°F – 122°F)
• pH Resolution: ±0.1 pH
• Temp Resolution: 0.1°C (1.0°F)
• pH Accuracy: ±0.1 pH
• Temp Accuracy: ±0.5°C
• Temp Compensation: 0°C – 50°C (automatic)
• Calibration: 2-point auto (4.0 & 7.0 pH)
• Waterproof Rating: IP65 body / IP67 electrodes
• Power: 3 × 1.5V AG-13 button cell batteries (included)
• Auto Power-Off: After 8 minutes
• Electrode Cord: 90cm
• Dimensions: 220 × 40 × 40mm
• Weight: 158g

📦 What's In The Box

• Aquamaster S300 Pro 2 Substrate pH/Temp Meter
• Electrode with 90cm cord
• Protective electrode cover
• 3 × AG-13 batteries (pre-installed)

💡 Pro tip: Always store the electrode in KCl storage solution inside the protective cover between uses — it keeps the tip conditioned and your readings accurate for longer.