I am looking for a pressure sensor/transducer that can be placed in water for measurements in the range +/- 0.1 bar. Note we are also measuring negative pressure (relative to atmospheric pressure). I am planning to use a national instruments I/O module to get the measurements into labview. Most sensors I found is either for use in air/gass or for very high pressures. Does anyone have any suggestions for a good sensor for this purpose, or tips on where to look for one?