Thermal Transpiration Effusion Calculator
Rarefied gas dynamics: Calculate the thermomolecular pressure ratio ($P_1/P_2 = \sqrt{T_1/T_2}$) between vacuum chambers and gauge ports across molecular, transition, and continuum regimes.
Temperature & Chamber Conditions
Cryo shield (-196°C = 77K) or hot oven
Room temperature gauge head
Gas Molecular Species
True Chamber Pressure & Ratio
True Chamber Pressure P₁:
--
mbar (actual in chamber)
Pressure Ratio P₁ / P₂:
--
actual vs gauge
Ideal Kn Ratio:
--
√(T₁ / T₂)
Knudsen Kn:
--
in connecting tube
Gauge Error:
--
% if uncorrected
Rarefaction Regime Classification
Flow State:
--
Transition Interpolation Function F(Kn):
--
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