Lab supplies
18-Pack pH Buffer Calibration Powder Kit (4.00 / 7.00 / 10.01)
Product description
What’s included
- 18 individual calibration powder packets: 6 × pH 4.00, 6 × pH 7.00, 6 × pH 10.01.
- Packets are single-use measured portions designed to be mixed with a fixed volume of water for consistent results.
Materials and format
- Dry reagent powders in tear-open sachets for convenient, spill-free handling.
- Powder form minimizes contamination risk and extends shelf life compared with ready-made liquids.
How to prepare and use
- Dissolve each packet into 250 ml of distilled water to make one calibration solution.
- Use the freshly mixed buffer to calibrate pH pens, handheld meters, probes and testers according to your instrument’s instructions.
- Rinse probes between calibrations and store unused packets in a cool, dry place.
Applications and compatibility
- Intended for precise calibration of 0.01‑resolution pH meters in labs, classrooms, hydroponic setups, aquariums, pools, brewing, gardening and research.
- Powder buffers provide more individual calibrations per shipment versus premixed bottles and are convenient for frequent users who need to maintain instrument accuracy.
Quality assurance
- Formulated for accurate pH setpoints and consistent performance when prepared as directed. Regular calibration with these buffers helps prevent drift and false readings in routine water testing and scientific work.
Pros
- Powder packets reduce contamination and extend shelf life
- Six sachets per pH value for frequent calibrations
- Mix with 250 ml distilled water for consistent results
Cons
- Requires distilled water and correct mixing each time
- Single-use packets generate some packaging waste
- No color dye in solutions — label jars to avoid confusion
VerdictThis 18-pack of pH buffer powders delivers lab-style calibration in a compact, shelf-stable form. Six packets each of 4.00, 7.00 and 10.01 offer frequent calibration capability for 0.01‑resolution meters, pens, and probes. The powders dissolve into 250 ml of distilled water, producing fresh, uncontaminated solutions on demand and giving more calibrations per shipment than premixed bottles. They’re
Reviews
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William S 5/5
Fast, Precise Calibration
These packets make calibrating my meters quick and dependable. Follow the instructions and use distilled water — mixing is simple and the meters read consistently after calibration.
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Mac G 4/5
Does the Job
Dissolve a packet in distilled water and use to calibrate — straightforward and effective.
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Just A Dream Away 4/5
Worthwhile Supply — Check Which set You Get
I ordered this to calibrate a pool tester but misread the label and received the 4.00/7.00/10.01 combination instead of another option. That was my oversight—the labeling is clear. The 4.00 sachets mixed cleanly and matched my other references; the set is a sensible way to keep spares on hand if it contains the pH points you need.
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Active Man 5/5
Good for DIY Calibration
Accurate and easy to prepare if you use distilled water. These buffers don’t include color dyes, so I mark jars myself and refresh solutions monthly for consistent readings.
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Ras the Exhorter 5/5
Ideal for Sensitive Plants
My carnivorous plants need precise pH. These powders mix without clumping, match premixed solutions within meter accuracy, and stay usable longer since they’re stored dry. A practical, space-saving option.
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J. Chandler 5/5
Handy for Garden, Aquarium, and Hydroponics
I use pH meters across my garden, tanks and hydroponic setups, so proper calibration matters. The 18‑pack has been reliable during a month of use; each sachet dissolves cleanly in 250 ml of distilled water without clumps, giving fresh buffer whenever I need it.
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private 5/5
Used for Comparative Checks
I compared these powders with other brands to validate three meters at home. All meters showed similar readings across the prepared buffers, so I’m confident the sachets are accurate and will last me a long time.
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