Creating Space for Your Ideas – With the World's Smallest Flow Sensor
The SDP3x is the world's smallest differential pressure sensor. With a size of just 5 mm x 8 mm x 5 mm, it is the ideal solution for measurement of flow in devices where size is crucial. The form factor of the sensor opens up new dimensions of integration and application possibilities. It enables not only a cost-effective and precise flow measurement, but also a significant reduction in the size of existing devices. With Sensirion's CMOSens® Technology, the SDP3x series provide superior sensitivity at low flows, no zero-point drift and a fully digitally integrated, calibrated and temperature-compensated solution. Sensirion's differential pressure sensor SDP3x is the ideal choice for highly demanding applications, such as portable medical devices, drones or robots. We create space for your ideas. Get inspiration from the world's smallest flow sensor and revolutionize your flow measurement.
Countless Integration and Application Ideas

Flow and Filter Monitoring, Anywhere
Filters are used in numerous industries and applications. A filter provides good functionality only if it is undamaged and remains unclogged. It should be replaced regularly to ensure economical, safe and effective operation. The SDP3x enables flow and filter measurement in real time.

Air Speed Measurement for Better User Experience
Many UAV applications require a full calibration to ensure the best accuracy and resolution, and the highest sensitivity to generate reliable readings at low air speeds. The SDP3x sensor offers this, dramatically increasing the safety and user experience for the end user.

Breath Detection and Flow Measurement in One
Triggering on inhalation flows and the precise characterization of the flow profiles are important in many respiratory applications. The SDP3x can be integrated into smart metered dose inhalers and will revolutionize respiratory therapies in the near future. Get a guide to make your own flow meter.
The SDP3x 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 in 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 measurement of differential pressure and mass flow.
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Developers Web – Get Inspired!
Sensirion's developer website provides developers with ideas and support to launch their own projects using Sensirion's innovative environmental and flow sensors. Information on hardware platforms and tutorials, and implementation descriptions for interesting applications are available.
Visit the developer website to get inspired by our application concepts or the lab ideas and learn about the SDP3x flow sensor that creates space for your flow measurement ideas.
Sensirion Lab Ideas With the SDP3x
Sensirion stands for innovation. To inspire engineers and developers who are working with our sensor solutions, we have founded a new section called "Sensirion Lab Ideas". There you can find documentation to various ideas, which our employees came up with. See all lab ideas.

Sensirion's differential pressure sensor SDP3x is well suited to measure the heart rate with a sleep tracker placed below the bed mattress - without the need of an inflated mat. Explore now.

A spirometer is used for lung function testing. To meet accuracy requirements, Sensirion's differential pressure sensor provides an attractive solution at lower costs than many ultrasonic sensors. Explore now.

Non-local breath detection separates electronics from the patient interface which is often a nasal connection. The requirements on the sensor therefore is high sensitivity at very low flows, a strength of the SDP3x. Explore now.

A very sensitive pressure sensor can detect the burst of air generated by breaking windows or the opening and closing of doors. Thus, with Sensirion's SDP3x it is possible to detect an intrusion event happening somewhere in the building. Explore now.