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VIVOSUN pH meter buffer powder packets: pH 4.00, pH 6.86, pH 9.18. 18 packets.
Vivosun pH meter buffer powder packs: pH 6.86, 4.00, 9.18. Accuracy +/-0.01. 18 packs.
Vivosun pH meter buffer powder packet dissolving in water for quick calibration.
Vivosun pH meter calibration: 4 steps showing adding powder to beaker, adding water, stirring, and pH meter ready.
VIVOSUN pH meter in water with buffer powder packets and text: "High Accuracy & Stability".
VIVOSUN pH 6.86 buffer powder packets - sealed, accurate, portable, easy storage.
Three VIVOSUN pH meters (green, black, yellow) in glasses of water with calibration buffer packets.
Table of Vivosun pH meter calibration values showing temperature in °F and °C, and corresponding pH readings.
VIVOSUN pH meter buffer powder packets: pH 4.00, pH 6.86, pH 9.18. 18 packets.
Vivosun pH meter buffer powder packs: pH 6.86, 4.00, 9.18. Accuracy +/-0.01. 18 packs.
Vivosun pH meter buffer powder packet dissolving in water for quick calibration.
Vivosun pH meter calibration: 4 steps showing adding powder to beaker, adding water, stirring, and pH meter ready.
VIVOSUN pH meter in water with buffer powder packets and text:
VIVOSUN pH 6.86 buffer powder packets - sealed, accurate, portable, easy storage.
Three VIVOSUN pH meters (green, black, yellow) in glasses of water with calibration buffer packets.
Table of Vivosun pH meter calibration values showing temperature in °F and °C, and corresponding pH readings.
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Vivosun pH Buffer Solution Powder Kit | 18-Pack

Official VIVOSUN Dealer Model: WEB-PHP-0001
$12.99 USD
  • Delivers ±0.01 pH accuracy at 25°C for precise probe calibration.
  • Includes 18 packets covering three common reference points for multi-point testing.
  • Compact individual packaging ensures long-term shelf stability for all buffer types.
  • View More Details

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are checking your pH levels daily because a small drift in your nutrient solution can throw off your entire harvest.
  • You are calibrating your sensors manually because you need to ensure your readings are accurate before each batch.

  • The individually sealed packets are a win because they prevent the powder from clumping during long storage.
  • Mixing these into exactly 250 ml of distilled water is straightforward and avoids the common measuring errors.

  • Growers who used to rely on generic solutions say they now get more consistent, reliable readings across all their meters.
  • Buyers who switch to this kit say it simplified their calibration process because everything they need is pre-measured.

Vivosun pH Buffer Solution Powder Kit | 18-Pack

Every pH meter drifts over time. An uncalibrated meter can read a few tenths off, which is enough to push your nutrient solution out of range while the display says everything is fine. The Vivosun pH Buffer Powder Calibration Kit keeps your readings honest. It includes 18 pre-measured packets across three reference points (pH 4.00, 6.86, and 9.18), each accurate to ±0.01 pH at 25°C (77°F), so you can recalibrate any pH meter quickly and trust the results.

Each packet is individually sealed to lock in freshness and accuracy, and the high-purity powders hold their values even after long-term storage. Mixing is simple: empty a packet into a clean glass beaker, add 250 ml of deionized or distilled water, and stir until the powder dissolves, which takes seconds. The powders contain no harmful substances, and the compact 2.4" × 3.2" packets tuck easily into a drawer, tool bag, or pocket for calibration on the go.

Features

Vivosun pH buffer powder packets with ±0.01 pH accuracy at 25°C
Vivosun pH 6.86 buffer powder dissolving quickly in water
Vivosun pH 4.00, 6.86, and 9.18 buffers compatible with any pH meter
Vivosun individually sealed pH buffer powder packet
🎯
±0.01 pH Accuracy

High-purity buffers deliver precise calibration at 25°C (77°F) for reliable readings.

🧪
Three Reference Points

Six packets each of pH 4.00, 6.86, and 9.18 support multi-point calibration.

📦
Individually Sealed

Each packet stays fresh and accurate until use, and is easy to carry and store.

⚡
Quick Dissolution

Pre-measured powder dissolves fast in 250 ml of water for instant calibration.

🔄
Works With Any pH Meter

Compatible with any pH tester and probe, from pocket pens to benchtop meters.

🗄️
Long-Term Stability

Buffers hold their values in storage, so one kit covers many calibrations.

What's Included

  • 6x pH 4.00 Buffer Powder Packets
  • 6x pH 6.86 Buffer Powder Packets
  • 6x pH 9.18 Buffer Powder Packets

Specifications

Specification Value
Buffer pH Values 4.00, 6.86, 9.18
Accuracy ±0.01 pH at 25°C (77°F)
Quantity 18 packets (6 of each value)
Solution Volume 250 ml per packet
Water Required Deionized or distilled
Packet Size 2.4" × 3.2"
Compatibility Any pH meter or probe
Storage Cool, dry place

How to Use

  1. Empty the entire packet into a clean glass beaker.
  2. Add 250 ml of deionized or distilled water.
  3. Stir gently until the powder is fully dissolved.
  4. Calibrate your pH meter following its manufacturer's instructions.

Calibration Values by Temperature

°F / °C pH 4.00 pH 6.86 pH 9.18
50°F / 10°C 4.00 6.92 9.33
59°F / 15°C 4.00 6.90 9.28
68°F / 20°C 4.00 6.88 9.23
77°F / 25°C 4.00 6.86 9.18
86°F / 30°C 4.01 6.85 9.14
95°F / 35°C 4.02 6.84 9.10
104°F / 40°C 4.03 6.84 9.07
113°F / 45°C 4.04 6.83 9.04
122°F / 50°C 4.06 6.83 9.03

Warranty

The Vivosun pH Buffer Powder Calibration Kit is a consumable product sold as-is with no warranty.

Frequently Asked Questions

How do I prepare the buffer solution? +

Empty one packet into a clean glass beaker, add 250 ml of deionized or distilled water, and stir gently until the powder fully dissolves. The solution is then ready for calibration.

Will this work with my pH meter? +

Yes. The buffer powders are compatible with any pH tester and probe. Follow your meter's calibration instructions to determine which reference points (4.00, 6.86, and/or 9.18) to use.

Why should I use distilled or deionized water? +

Tap and filtered water contain minerals that can shift the buffer's pH value. Distilled or deionized water keeps the solution at its labeled reference point for accurate calibration.

Does water temperature affect calibration? +

Buffer values shift slightly with temperature, as shown in the calibration table above. Vivosun pH meters have Automatic Temperature Compensation (ATC), so temperature is handled automatically. For meters without ATC, use the table to match the correct value to your solution temperature.

How long do the packets last in storage? +

Each packet is individually sealed to preserve freshness and accuracy, and the buffers maintain their pH values through long-term storage. Keep unopened packets in a cool, dry place.

Are the buffer powders safe to handle? +

Yes. The powders contain no harmful substances, making them safe for routine calibration at home or in the grow room.

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Questions About This Product?

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