Apera Instruments pH calibration buffer kit, 8 oz bottles

For routine pH meter calibration, having buffers at the values you use can make setup more straightforward. This Apera Instruments kit covers 4.00, 7.00, and 10.01 pH.

Each solution comes in an 8 oz bottle, so the set is organized around three calibration points rather than a single buffer.

Color coding helps distinguish the bottles at a glance. The practical question is whether these values match the calibration points you need.

Key specifications

The kit contains pH 4.00, 7.00, and 10.01 buffer solutions, with 8 oz for each. The reported values are accurate to ±0.01 pH at 25 °C and traceable to NIST Standard Reference Materials. That gives you stated reference values for calibration, it does not tell you how often to calibrate or which settings to use on a particular meter.

The solutions are made with high-purity reagents and deionized water, using certified analytical balances in a temperature-controlled environment at an ISO 9001:2015-certified facility. Those production details may matter if you want documented reference standards, but they are not a substitute for matching the buffers to your meter’s calibration procedure.

Who it’s for

This set is aimed at people who calibrate pH meters and need buffers spanning acidic, neutral, and alkaline reference points. It could suit a home testing setup or a workbench where those three values are part of the routine. For example, you can keep the color-coded bottles together, select the buffer for the calibration point you are using, and avoid mixing up similarly labeled solutions.

It makes sense if you want a three-value set in larger bottles instead of buying only one calibration point at a time. You may want to skip it if your workflow calls for different pH values or if you only need one buffer, the listing does not describe alternate values or a smaller single-solution format.

What's included

The product name identifies three bottles: pH 7.00, pH 4.00, and pH 10.01, with 8 oz of each. The bottles are described as double-sealed and color-coded, which supports quick identification and helps keep the set organized. No pH meter or other calibration equipment is listed as part of the kit, so plan on using your own device and following its instructions.

One useful detail for planning is the stated two-year expiration from manufacture for an unopened bottle. That period applies to unopened bottles, the product details do not specify a usable period after opening. If you expect to store the set for a while, the manufacture date and the bottle’s opened status matter.

Before you decide

Which pH values are in the kit? It includes 4.00, 7.00, and 10.01, with 8 oz for each solution.

What does NIST traceable mean here? The reported buffer values are traceable to NIST Standard Reference Materials, and the stated accuracy is ±0.01 pH at 25 °C.

How long do unopened bottles last? The listed expiration is two years from manufacture for an unopened bottle. No opened-bottle timeframe is provided.

When it makes sense

Choose this set when all three listed calibration points are useful to your routine and you want a clearly labeled bottle for each. Its range is more versatile than buying a single buffer when you need acidic, neutral, and alkaline references. The tradeoff is that the set may be unnecessary if your meter routine uses only one point, and the stated shelf-life detail applies only before opening. Match the included values to your calibration needs before choosing it.