First Digital Dynamic Differential Pressure Sensor

Jan 03 2009

With its SDP600 series, Sensirion (Switzerland) is bringing the world’s first digital dynamic differential pressure sensors on the market. The fully calibrated sensors feature high sensitivity and accuracy even at low pressure differences (less than 10 Pa). The SDP600 and SDP610 provide a digital output and are extremely reliable due to their absence of offset and drift errors.

Thanks to their small package size and high level of integration, these innovative sensor products can be supplied at economical prices.

It is a well-known fact that using a differential pressure sensor can facilitate improved control and monitoring in many application scenarios. However, this requires a sensor that operates with high precision and reliability, and which, ideally, also helps reduce costs. With the newly developed SDP600 and SDP610, Sensirion AG is launching a pair of dynamic differential pressure sensors that can fulfill these demanding requirements. The SDP600 and SDP610 supply a digital I2C output signal with a measuring range of -500 to +500 Pa. Even at low differential pressures (less than 10 Pa), the sensor achieves outstanding accuracy and sensitivity. This performance is based on a dynamic measuring principle in which the differential pressure is determined using intrinsic flow measurement. The SDP600

series sensors are not affected by offset and drift errors and feature an outstanding dynamic pressure range. Intelligent packaging with a correspondingly compact package size allows lower manufacturing costs and thus a competitive price. In addition, the high level of integration may reduce the total electronic component count in the applications these fully calibrated sensors are used with.

The new differential pressure sensors are available in two versions. The SDP600 is intended for a direct threaded connection to a pressure manifold via O-ring sealing, while the SDP610 is designed for a hose connection. The outstanding performance results from the device’s sensor chip, which is based on Sensirion’s unique, patented CMOSens® technology. With this technology, Sensirion has succeeded in completely integrating a thermal sensor element and full signal conditioning circuitry on a single semiconductor chip. Thanks to large-scale fabrication of CMOSens® devices, these microchips can be produced in large volume with consistently high quality.