Differential Pressure Sensor SDP3x

The World's Smallest Differential Pressure Sensor

Differential Pressure Sensor SDP3x

The World's Smallest Differential Pressure Sensor

The SDP3x is the world's smallest differential pressure sensor. It measures just 5 mm x 8 mm x 5 mm, opening up new dimensions of integration and application possibilities. The sensor is based on the next generation of the CMOSens® sensor chip and is the heart of Sensirion's new sensor platform for measuring differential pressure and mass flow.

The SDP3x differential pressure is ideal for the measurement of mass flow in a bypass configuration. The sensor is reflow solderable, provides extended functionality, such as multiple I²C addresses and interrupt functions and a fast sampling time. Like all Sensirion differential pressure sensors, the SDP3x features excellent accuracy and long-term stability and has no zero-point drift. All this makes Sensirion's differential pressure sensor of the SDP3x series the perfect choice for high volume and cost-sensitive applications, where small size is essential.

The digital and fully calibrated and temperature compensated differential pressure sensor are available in different versions. 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.

An evaluation kit is available that enables simple and cost-effective evaluation of the SDP3x differential pressure sensor.

The SDP3x Series

SDP31 - digital version (I²C), pressure range: +/- 500 Pa

SDP32 - digital version (I²C), pressure range: +/- 125 Pa

SDP36 - analog version, pressure range: +/- 500 Pa

SDP37 - analog version, pressure range: +/- 125 Pa

Features

Smallest size (5mm x 8mm x 5mm), opening up new dimension of integration and applications possibilities
Measurement range ±500Pa (±2 in. H2O) or ±125Pa (±0.5 in. H2O), for other ranges contact Sensirion
Excellent accuracy and repeatability, even below 1Pa
No zero-point offset, no drift
Calibrated and temperature compensated
Fast sampling time of 2kHz at 16 bit resolution
Digital I²C and analog output versions
Reflow solderable, shipped in tape and reel for pick and place
Smart averaging algorithm and other digital and analog features
Evaluation kit available

Applications

Medical home care applications
Portable medical devices
Smart Inhalers
Lifestyle and consumer (IoT)
Appliances
Drones
Wind speed meters

Download Center

Here you can find all documents of Sensirion's differential pressure sensors for download.

Efficient Gas Flow Measurements in Bypass

Measuring gas flow in applications requiring high precision and cost-efficiency is a challenge. Experience in recent years has shown that microthermal flow sensors are superior to other technologies. Industries with exacting demands, such as automotive and medical technology, have recognized that microthermal gas flow sensors give their products decisive advantages. These manifest themselves in high long-term stability and precision even when flow rates are minimal, and the sensors’ suitability for cost-efficient and reliable mass production.