The KP235 is a miniaturized Analogue Barometric Air Pressure Sensor based on a capacitive principle. It is surface micro machined with a monolithic integrated signal conditioning circuit implemented in BiCMOS technology. The sensor converts a pressure into an analogue output signal. The calibrated transfer function converts a pressure of 40 to 115kPa into a voltage range of 0.5 to 4.5V. The sensor has been primarily developed for measuring barometric air pressure.