The following measurement tolerances apply to all SKS floor and mini pumps with a digital pressure gauge:
0–3.4 BAR (0–50 PSI): +/- 0.05 BAR (+/- 1 PSI)
> 3.4–6.9 BAR (50–100 PSI): +/- 0.1 BAR (+/- 2 PSI)
> 6.9 BAR (> 100 PSI): +/- 0.15 BAR (+/- 3 PSI)