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sci.pasteurization-PU-units Calculator
Calculates pasteurisation units PU = ∫10^((T−60)/z)dt from time-temperature profile, where z = 6.5 °C for beer. 1 PU = equivalent effect to 1 minute at 60 °C — commercial beer requires ≥ 10–15 PU; 25 PU for export pasteurised lager.
Inputs
T C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
T S
Duration of the process. Make sure units match the rate inputs (seconds, minutes, or hours).
T Ref C
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Z Value
Reference formula or conversion factor shown for context.
Results
pasteurization units PU
The value at the specified point or condition.
equivalent time at 60°C reference (s)
The computed duration or time value.
log reduction (relative)
The value at the specified point or condition.
PU = t × 10^((T-T_ref)/z)
Reference formula or conversion factor shown for context.
HTST standard (milk)
Sample size or count used in the calculation.
UHT
Reference formula or conversion factor shown for context.