pH buffer calibration solution powder accuracy is plus or minus 0.01pH, accurate and precise
Suitable with most of pH meters, Ideal for Calibrating
Individually wrapped to maintain freshness until use. Made with qualify materia
Easy to use: Mix the buffer powder with 250ML distilled water, put the pH meter in the solution and gently stir and wait a few seconds for the result
15 Pack : 5 packets of pH 4.01 Solution powder, 5 packets of pH 6.86 Solution powder,5 packets of pH 9.18 Solution powder , cost-effective and flexible for using