GY-68 BMP180 Replace BMP085 Temperature Pressure Sensor Module Board
£2.51
Using a sensor as capable as the BMP180 you can achieve accuracy of 1m, with noise of only 17cm in ultra high resolution noise. I2C interface. Pressure Range: 300hPa to 1100hPa (+9000m to -500m). Max I2C Speed: 3.5Mhz.
