I'm trying to find suitable sensor for my task. My everyday work (the same is true for my colleagues) involves operating with evacuated flasks and equipment (organic synthesis) and we're using old, ugly and dangerous mercury manometer for pressure measurements. I want to replace it with compact pressure sensing module based on integrated circuit connected to AVR-driven device. My plan is to buy I2C/SPI (I2C is in preference) digital absolute pressure sensor which is capable to measure air pressure with granularity of 1 mm Hg at least and to work at very low pressures (for example, our usual working pressure is about 12 mm Hg). Operating voltage doesn't matter now - it's okay to live with 3.3 and 5.0 volts as well.
As for now I've found two interesting ICs which seems to fit to my request:
But it would be nice to know community opinion and suggestions - perhaps anybody already worked on similar tasks and can offer better options or comment my choice.