Specification: Name: BMP180 Digital Barometric Pressure Sensor Board Module Pressure Range: 300hPa to 1100hPa (+9000m to -500m) Input Voltage: 1.8V to 3.6V (VDDA), 1.62V TO 3.6V (VDDD) LCC8 Packaging: Lead-free ceramic carrier packaging (LCC) Low Power Consumption: 0.5uA, in standard mode Precision: 0.06hPa Resolution(0.5m) in low power consumption mode; 0.03hPa Resolution(0.25m) in high linear mode MSL 1 Response Time: 7.5ms Standby Current: 0.1uA Feature: Temperature output, I2C Interface and temperature compensation, Lead-free, ROHS compliant. Size: 3.6mmx3.8mmx0.93mm Application: GPS accurate navigation (dead reckoning, up and down bridge detection etc.), Indoor and outdoor navigation, Leisure, sports and medical health monitoring, Weather Forecast, Vertical speed indication(Rise/sink speed), Fan power control etc. This precision sensor is the best low cost solution for measuring atmospheric pressure and temperature. Due to the pressure varies with height, you can also use it for height measurement. Easy to use. VIN is input positive, GND is negative or ground, SCL is CKOUT Clock Output, SDA is data output. Take Arduino as an example, you just need connect VIN to 3.3V/5V voltage pin, GND to ground, SCL to I2C clock (Simulation 5) and SDA to I2C data (Simulation 4). Download BMP180 Arduino data and sample code used for temperature, pressure and height calculation. And you will get accurate temperature, pressure and height data. Package: 3 x BMP180 Sensor Board Module