BMP085 is a high precision, ultra-low power consumption pressure sensors, can be applied to mobile devices. Its performance, the absolute accuracy of the minimum can reach 0.03hPa, and very low power consumption, only 3?A. BMP085 powerful 8-pin ceramic-lead chip carrier (LCC) ultra-thin package, through the I2C bus can be connected directly with a variety of microprocessor. Typical applications: 1.GPS precise navigation (dead reckoning, the upper and lower bridge detection, etc.) 2 indoor and outdoor navigation 3.Leisure, sports and medical health monitoring 4 The weather 5.vertical speed indicator (up / sinking speed) 6. Fan power control