The pressure sensor is called the XP-6000CA and will be available in October 2010. It is able to “detect height changes in 3 cm increments” by sensing changes in pressure used for calculating the water level of rivers or the water level behind dams. Epson has “miniaturized its quartz pressure sensors to the point where they are compact enough for use in the smallest mobile devices – without sacrificing accuracy or resolution.”
The XP-6000CA employs QMEMS pressure-sensing structure and its into a 7.0 x 5.0 x 2.0t mm package. It has a pressure accuracy of +/-30 Pa and resolution of 0.3 Pa. It has a pressure measurement range of 30 kPA to 130 kPA and operates at temperatures ranging from -40 to 85 degrees Celsius.