The BPS-06 sensor is designed to measure the local barometric pressure.
The device is an individual intelligent digital sensor with RS-485 digital interface. The amplifier, signal processing circuits and a FLASH microcontroller are placed in the sensor.
The Sea-Level Normalized Pressure (QNH) is calculated from the Station Level Pressure (QFE) by the microcontroller using the following formula:

QNH = QFE*e^{(k1*ln(1+k2*H/T))}