The BMP280 with Board Mount Pressure Sensors Digital Barometer 2.7uA, 300-1200hPa is a high-precision, miniaturized pressure sensor from Bosch designed for low-power applications. It is so small that it can even be mounted on a PCB. The sensor measures the absolute pressure of the surrounding air and reports in hectopascal (hPa) up to an accuracy of ±1hPa over the wide range of 300 to 1200 hPa. It is also equipped with an integrated temperature sensor capable of measuring temperatures down to 0.5°C accuracy, as well as a built-in signal processing unit and a serial peripheral interface (SPI) for controlling and accessing the measured data. The pressure sensor also features a programmable power mode for configuring the power consumption and has a standby current of only 2.7uA, thus making it ideal for battery-powered applications that require long battery life.