Tiny differential-pressure sensor opens up new worlds
Sensirion
The SDP3x sensor (photo) is the world’s smallest differential-pressure sensor, measuring just 5 mm by 8 mm by 5 mm, according to its manufacturer. It is reflow-solderable and provides extended functionality, such as multiple I2C addresses and interrupts, and fast sampling time. It is designed for high-volume, cost-sensitive applications where size requirements or constraints are essential when measuring differential pressure and mass flow. The digital, fully calibrated and temperature-compensated differential-pressure sensor is available in different versions. For instance, the digital SDP31 sensor and the analog SDP36 sensor measure bi-directional pressure differences up to 500 Pa, while the digital SDP32 and the analog SDP37 measure bi-directional pressure differences up to 125 Pa. — Sensirion AG, Staefa, Switzerland