HM Digital pH 7.0 Buffer Solution - 20 Packets of 20 ml

Neutral pH Calibration Reference - 20 Single-Use Packets

A pH meter drifts over time, and readings you cannot trust lead to poor nutrient solution adjustments. This buffer solution gives you a pH 7.0 reference to check and calibrate your meter against. Each packet is sealed separately, so you open fresh solution only when you need it.

One unit holds 20 packets of 20 ml. That suits home gardeners who calibrate now and then, and regular indoor growers who calibrate before each batch of reservoir checks.

Key Features & Benefits

• pH 7.0 buffer — a neutral reference point for meter calibration.
• Individual 20 ml packets — open only what you need and avoid contaminating a larger bottle.
• 20 packets per unit — enough for repeated calibrations over time.
• Liquid format — ready to pour, with no mixing step.

Who Should Use HM Digital pH 7.0 Buffer Solution

Anyone who measures pH in hydroponic systems or in nutrient solutions for vegetative growth and flowering will benefit. It suits home and commercial growers who keep meters accurate.

About HM Digital pH 7.0 Buffer Solution

HM Digital makes meters and controllers for hydroponics and water testing. This product, code HM-PH-P7, is sold each as one unit of 20 packets of 20 ml.

Frequently Asked Questions

Q: What is a buffer solution?
A: A buffer solution holds a known, stable pH value. You immerse the meter probe in it and adjust the meter to match that value.

Q: Why use single-use packets?
A: Each packet is opened once, so the solution stays clean. A reused solution can pick up contaminants and give a false reference.

Q: How do I calibrate with it?
A: Rinse the probe, immerse it in the solution, and wait for the reading to settle. Then follow your meter's calibration steps. Check your meter manual for the exact procedure.

Q: Should I reuse a packet?
A: No. Discard the solution after calibrating, because used solution no longer gives a reliable reference.

Q: Is one buffer enough?
A: Many meters calibrate with two or more points to cover a wider range. Check your meter's manual for how many points it needs.