Aquamaster pH 4.01 Calibration Solution | 100ml | NIST Traceable

🔬 Calibrate with Confidence

Precise pH readings start with a reliable reference point. The Aquamaster pH 4.01 Calibration Solution is a NIST-traceable, lab-grade buffer solution that keeps your pH meter accurate and your grow dialled in — every single time.

pH 4.01 is one of the two standard calibration points used in 2-point pH calibration (alongside pH 7.0), making this an essential consumable for any serious grower. 🌱

✅ Why Use Aquamaster pH 4.01 Solution?

• 📐 NIST-traceable accuracy — meets international measurement standards
• 🧪 pH 4.01 reference point — the industry-standard low-point for 2-point calibration
• 💧 100ml bottle — enough for multiple calibration sessions
• 🔒 Stable formula — store between 15–25°C for long shelf life
• ✔️ Compatible with Aquamaster meters and most pH meters on the market

📋 Usage Instructions

Pour a small amount into a clean cup, insert your pH probe, and calibrate per your meter's instructions. Close the bottle immediately after use and do not return used solution to the bottle. Store between 15–25°C.

💡 Pro Tip: Always use fresh solution from the bottle — never reuse calibration liquid from a cup. This keeps your reference point pure and your readings accurate.

📦 What's Included

• ✔️ 1 × Aquamaster pH 4.01 Calibration Solution — 100ml