pH Calibration Powder 3 Pack – Laboratory-Grade Sachets

pH Calibration Powder provides an accurate and reliable way to calibrate any digital pH meter. Each sachet mixes with 250 mL of distilled water to create a fresh, high-precision buffer solution—perfect for hydroponics, horticulture, aquariums, brewing, laboratory testing, and water treatment.

Made for convenience and accuracy, these individually sealed powders eliminate contamination risks and ensure every calibration starts with a clean, stable solution. Suitable for all brands and types of electronic pH meters.

Benefits:

• Easy to prepare - just mix with distilled water
• Compatible with all electronic pH meters
• Individually sealed to maintain freshness and accuracy
• High precision: accurate to ±0.01 pH at 25 °C
• Stable, reliable buffer solution once mixed
• Available in multiple standards: 4.01, 6.86, 9.18,

Directions for Use:

1. Cut open one sachet and pour the powder into a clean 250 mL measuring flask or beaker.

2. Rinse the inside of the packet with a small amount of distilled water to ensure all powder is used.

3. Top up with distilled water to exactly 250 mL and mix until fully dissolved.

4. Rinse your pH meter probe with purified water 2–3 times.

5. Immerse the probe in the prepared calibration solution and adjust the meter to match the buffer value.

6. For greater accuracy, use two-point or three-point calibration:

   • Start with pH 6.86, then calibrate with 4.01 or 9.18 (two-point)

   • Use 4.01 + 6.86 + 9.18 for three-point calibration

Includes:

• 3 x pH Calibration Powder sachet (makes 250 mL) - pH 4.01, 6.86 & 9.18

Note: Powder has no shelf life when sealed. Each sachet is single-use once opened.