Tech Gas Blender
is an advanced Real Gas Blending Windows program for mixed gas diving calculations, based on the most accurate single gas and mixture models currently available.
Tech Gas Blender is based on a scientific approach that provides theoretical criteria to calculate by partial pressure Oxygen - Helium - Nitrogen mixtures in any possible combination and gas sequence, without the need of empirical adjustments like "Fudge Factors", "trials and errors" etc.
Tech Gas Blender uses a model based on the modified Benedict-Webb-Rubin and the Helmholtz equations of State for the thermodynamic properties of pure gas; the mixture calculations employ a model whith mixing rules applied to the Helmholtz energy of the mixture components.
The objective in selecting these property calculation algorithms was to implement the most accurate models integrated with all the gas maths for advanced divers.
The accuracy of these formulae is reproduced in the diving range of pressures and temperatures (up to 300 bar and 0 - 80 °C temp) with negligible deviations in density:
Pure gas uncertainties in density:
Nitrogen 0.02 %