I do not think I have ever seen a pressure transducer specification with resolution listed. In principle the signal is continuous so the resolution should be infinitely fine.
In practice specs like non-linearity, hysteresis, and assymmetry (all of which are ~1%) provide some idea of how low you can go. A full scale signal will be 15 mV = 5uV/V/mmHg * 10 V * 300 mmHg. The 1% limit would be 150 uV or 3 mmHg. The thermal noise over the 200 Hz bandwidth would be 34 nV. A 16-bit DAQ with a +/-0.1 V range has a resolution of ~3 uV.
Many times you can get some useful information from strain gauge bridge transducers below the 1% limit in the specifications. Manufacturers try to make their products better than the specs by some amount so they do not get complaints about the performance from the customers. Hysteresis limitation only apply when the pressure changes direction. Often you can detect changes which are much smaller when the signal is only moving one way.
I would expect that you could get resolution on the order of 1 mmHg if the noise levels are low, the signals tend to move mostly in one direction, and they are not moving too fast.
Note: The period at the end of the link in your post needs to be removed to get the data sheet.
Lynn
