Aqua Master Tools Calibration Solution - pH 4.01 - 20 ml Sachet

Fresh pH 4.01 Buffer for Every Calibration - 20 ml Sachet

A pH meter drifts over time, and a drifting meter leads to wrong nutrient solution adjustments. Using an opened bottle again can bring contamination into your calibration. This single-use sachet gives you a measured portion of pH 4.01 buffer so you calibrate against clean liquid each time. The distributor states the solution is traceable to a NIST standard.

The 20 ml sachet suits hobbyists and small indoor growers who calibrate now and then and want no half-used bottles going stale. Commercial growers with several meters can calibrate each one with its own fresh portion.

Key Features & Benefits

• pH 4.01 buffer — serves as the acidic point in a two-point meter calibration.
• 20 ml single-use sachet — gives you fresh liquid for each calibration.
• NIST-traceable — ties the buffer value to a recognised reference standard.
• Stated storage range of 15-25 °C — keeps the solution stable until you use it.

Who Should Use Aqua Master Tools pH 4.01 Calibration Solution

Anyone who measures nutrient solution pH in hydroponic systems or soilless cultivation, from home gardeners to commercial operations, can use it to check and correct meter accuracy.

About Aqua Master Tools Calibration Solution

Aqua Master Tools makes pH 4.01 calibration solution in a 20 ml sachet. It is sold as one sachet. The distributor states it is traceable to a NIST standard and should be stored between 15 and 25 °C.

Frequently Asked Questions

Q: Can I reuse the solution after calibrating?
A: No. Do not reuse the liquid. Once a probe has been in it, the buffer can pick up contamination and give a false reference next time.

Q: Why use a sachet instead of a bottle?
A: A sachet gives you fresh solution every time, with no leftover liquid to degrade. A bottle costs less per millilitre in some cases, but it needs careful handling once opened.

Q: How should I store it?
A: Store it between 15 and 25 °C. Keep it out of heat and away from direct sun.

Q: What does NIST-traceable mean?
A: It means the buffer value can be linked through documented steps to a reference standard from the US National Institute of Standards and Technology. This supports confidence in the calibration point.

Q: Do I need other solutions as well?
A: Most pH meters calibrate at two or more points. Pair this acidic buffer with a second buffer at a different pH, and follow your meter manual.