• Megatrends

    • Energy transition

      The energy transition is key to a sustainable future – driven by innovative technologies and smart solutions

    • Artificial intelligence

      From measurement to smart decisions

    • Emission reduction

      Making emissions visible, measurable, and manageable

    • Health and well-being

      Smarter sensing for cleaner, safer, and more comfortable living

    • Internet of things

      Enabling Smart Infrastructure & IoT through high-precision environmental sensing for healthier, more efficient, and fully connected buildings

  • Applications

      • Smart inhalers
      • Metabolic breath analysis
      • Subcutaneous drug delivery
      • Mechanical ventilators
      • Infusion
      • Anesthesia machines
      • CPAP devices
      • Heart-lung machines
      • Nitric oxide therapy
      • Urine flow measurement
      • Battery energy storage systems
      • Chip mounter
      • Clean cooking (LPG)
      • Combustion control
      • Substrate storage and handling
      • GC analyzer
      • Gas meters
      • Humidity in oil
      • Photoresist coating and dosing
      • Thin-film deposition and etching
      • Gas purging
      • Transport of pharmaceutical goods
      • Transport of perishable goods
      • Bioreactors
      • Condition monitoring & instrument diagnostics
      • Custom manifold solutions
      • DNA sequencing
      • Flow cytometry
      • Gas chromatography
      • Liquid chromatography
      • Mass spectrometry
      • Microfluidics
      • Thermal analysis
      • Refrigerators
      • Demand-controlled ventilators
      • Room sensors
      • VAV controllers
      • Filter monitoring
      • Refrigerant leakage detection
      • Air conditioners
      • Air purifiers
      • Thermostats
      • Indoor air quality monitors
      • Smart speakers
      • Vape detectors
      • Sleep quality
      • Metabolic breath analysis
      • Air intake
      • Antifogging
      • Brake-by-wire systems
      • Humanoid robots
      • H2 monitoring in fuel cells
      • LiDAR systems
      • Safety of electric vehicles
      • Steer-by-wire systems
  • Products

      • Find your product
      • Humidity sensors
      • Temperature sensors
      • Refrigerant leakage sensors
      • CO₂ sensors
      • O₂ sensors
      • NOx & VOC sensors
      • Formaldehyde sensors
      • Particulate matter sensors
      • Hydrogen sensors
      • Liquid flow sensors
      • Gas flow sensors
      • Differential pressure sensors
      • Mass flow controllers
      • Gas metering solutions
      • Gas analyzers
      • Evaluation kits
      • ControlCenter
      • SEK-SensorBridge
      • Humidity/temperature
      • VOCs/NOx
      • Formaldehyde
      • CO₂
      • Particulate matter
      • Liquid flow
      • Differential pressure
      • Gas flow sensors
      • Mass flow controllers
      • Hydrogen detection
      • Download Center
      • Demonstrators and apps
      • FAQ
      • Technical support
      • Distributors
      • GitHub
      • Developer website
      • Distributors' inventory
      • Distributors
      • Representatives
      • Partner access
      • Commercial contact
      • Customized sensors
      • Development
  • Career

      • Find your dream position
      • Working at Sensirion
      • Career areas
      • Our locations
      • Our entities
      • Professionals
      • Graduates
      • Students
      • Apprentices
      • News
      • Events
      • Newsletter
      • WhatsApp news
    • Contact our P&C Team
  • Company

      • Company profile
      • Locations
      • Contact
      • Sustainability compliance
      • Energy efficency
      • Improving health
      • Ensuring safety and comfort
      • Technology
      • Encouraging innovation
      • Quality and reliability
      • All news
      • Press releases & news
      • Specialist articles
      • Events
      • Webinars
      • Newsletter
      • At a glance
      • Share information
      • Ad-hoc news
      • Results and reports
      • Financial newsletter
      • Events
      • Annual general meeting
      • Corporate governance
      • Sustainability
    • Growth is our aspiration, our global goal.

      Driving strategic growth areas

Directly to

  • Product catalog
  • Support
  • Technical downloads
  • Newsroom
  • Work at Sensirion

Sensirion

  • Developers platform
  • Sensirion Automotive Solutions
  • Sensirion Connected Solutions
  • Qmicro by Sensirion

Contact us

  • General Request
  • Commercial Support Request
  • Technical Support Request
  • Newsletter Registration

Legal notice© Sensirion AG

Back to catalog

SDP32

Digital differential pressure sensor (±125 Pa)

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.
See inventoryDistributor listContact sales
  • Home
  • Products
  • Product catalog
  • SDP32

Specification

Differential pressure
Pressure range125 - 125Pa125 - 125Pa
Accuracy3% m.v.3% m.v.
Zero point accuracy0.08Pa0.08Pa
Generic
Supply voltage2.7 - 5.5V2.7 - 5.5V
Average supply current3800uA3800uA
Max. supply current5500uA5500uA
InterfacesI²CI²C
Size (LxWxH)8.5 x 5.5 x 5.15mm8.5 x 5.5 x 5.15mm

Downloads

Datasheet SDP3x digital
  • 11/2022•
  • PDF•
  • 740.0 KB
DatasheetDownload Datasheet SDP3x digital11/2022Download Datasheet SDP3x digitalPDFDownload Datasheet SDP3x digital740.0 KBDownload Datasheet SDP3x digital
SDP31/32/33 measurement without dedicated flow restrictor
  • 08/2024•
  • PDF•
  • 122.4 KB
Application noteDownload SDP31/32/33 measurement without dedicated flow restrictor08/2024Download SDP31/32/33 measurement without dedicated flow restrictorPDFDownload SDP31/32/33 measurement without dedicated flow restrictor122.4 KBDownload SDP31/32/33 measurement without dedicated flow restrictor
Efficient Gas Flow Measurements in Bypass
  • 05/2023•
  • PDF•
  • 211.4 KB
Application noteDownload Efficient Gas Flow Measurements in Bypass05/2023Download Efficient Gas Flow Measurements in BypassPDFDownload Efficient Gas Flow Measurements in Bypass211.4 KBDownload Efficient Gas Flow Measurements in Bypass
Handling instructions SDP3x
  • 05/2023•
  • PDF•
  • 137.9 KB
Application noteDownload Handling instructions SDP3x05/2023Download Handling instructions SDP3xPDFDownload Handling instructions SDP3x137.9 KBDownload Handling instructions SDP3x
SDP Engineering Guide
  • 06/2024•
  • PDF•
  • 1.0 MB
GuideDownload SDP Engineering Guide06/2024Download SDP Engineering GuidePDFDownload SDP Engineering Guide1.0 MBDownload SDP Engineering Guide
SDP Measurement Parameters
  • 06/2024•
  • PDF•
  • 381.1 KB
GuideDownload SDP Measurement Parameters06/2024Download SDP Measurement ParametersPDFDownload SDP Measurement Parameters381.1 KBDownload SDP Measurement Parameters
SDP Selection Guide
  • 06/2024•
  • PDF•
  • 318.0 KB
GuideDownload SDP Selection Guide06/2024Download SDP Selection GuidePDFDownload SDP Selection Guide318.0 KBDownload SDP Selection Guide
SDP Signal Compensation
  • 06/2024•
  • PDF•
  • 350.4 KB
GuideDownload SDP Signal Compensation06/2024Download SDP Signal CompensationPDFDownload SDP Signal Compensation350.4 KBDownload SDP Signal Compensation
Arduino I²C SDP library
  • Link•
SoftwareDownload Arduino I²C SDP libraryDownload Arduino I²C SDP libraryLinkDownload Arduino I²C SDP libraryDownload Arduino I²C SDP library
Sample code SDP3x
  • ZIP•
  • 302.0 KB
SoftwareDownload Sample code SDP3xDownload Sample code SDP3xZIPDownload Sample code SDP3x302.0 KBDownload Sample code SDP3x
STEP file SDP3x
  • STEP•
  • 1014.5 KB
Drawings/CADDownload STEP file SDP3xDownload STEP file SDP3xSTEPDownload STEP file SDP3x1014.5 KBDownload STEP file SDP3x
Calibration Certification SDP3x
  • 04/2022•
  • PDF•
  • 90.7 KB
CertificateDownload Calibration Certification SDP3x04/2022Download Calibration Certification SDP3xPDFDownload Calibration Certification SDP3x90.7 KBDownload Calibration Certification SDP3x
REACH and RoHS declaration HalFree Differential Pressure
  • 04/2026•
  • PDF•
  • 105.3 KB
CertificateDownload REACH and RoHS declaration HalFree Differential Pressure04/2026Download REACH and RoHS declaration HalFree Differential PressurePDFDownload REACH and RoHS declaration HalFree Differential Pressure105.3 KBDownload REACH and RoHS declaration HalFree Differential Pressure
Differential pressure brochure Chinese
  • 06/2024•
  • PDF•
  • 1.5 MB
FlyerDownload Differential pressure brochure Chinese06/2024Download Differential pressure brochure ChinesePDFDownload Differential pressure brochure Chinese1.5 MBDownload Differential pressure brochure Chinese
Differential pressure brochure english
  • 05/2024•
  • PDF•
  • 1.3 MB
FlyerDownload Differential pressure brochure english05/2024Download Differential pressure brochure englishPDFDownload Differential pressure brochure english1.3 MBDownload Differential pressure brochure english
Differential pressure brochure Japanese
  • 06/2024•
  • PDF•
  • 1.8 MB
FlyerDownload Differential pressure brochure Japanese06/2024Download Differential pressure brochure JapanesePDFDownload Differential pressure brochure Japanese1.8 MBDownload Differential pressure brochure Japanese
Product flyer consumer electronics SDP3x
  • 04/2017•
  • PDF•
  • 661.2 KB
FlyerDownload Product flyer consumer electronics SDP3x04/2017Download Product flyer consumer electronics SDP3xPDFDownload Product flyer consumer electronics SDP3x661.2 KBDownload Product flyer consumer electronics SDP3x
Product flyer medical SDP3x
  • 04/2017•
  • PDF•
  • 655.2 KB
FlyerDownload Product flyer medical SDP3x04/2017Download Product flyer medical SDP3xPDFDownload Product flyer medical SDP3x655.2 KBDownload Product flyer medical SDP3x
Product flyer vacuum cleaner SDP3x
  • 06/2018•
  • PDF•
  • 874.0 KB
FlyerDownload Product flyer vacuum cleaner SDP3x06/2018Download Product flyer vacuum cleaner SDP3xPDFDownload Product flyer vacuum cleaner SDP3x874.0 KBDownload Product flyer vacuum cleaner SDP3x
  • All products
  • •Differential pressure sensors
  • •SDP3x

Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SDP31Differential pressure evaluation kit SDP31SEK-SDPDifferential pressure sensors

SEK-SDP31

Differential pressure evaluation kit SDP31

SEK-SDP

Differential pressure sensors

Download the respective viewer software to start measuring

Go to download center

Start testing our sensors fast and easy with the evaluation kits

How to get started

Applications for this product

Air purifiers

Air quality monitoring with our air purifier sensor

Learn more

Demand-controlled ventilators

Maximized well-being and optimum energy efficiency with our DCV sensor

Learn more

Filter monitoring

Optimal strategy for replacing filters

Learn more

Smart inhaler flow sensor

Smart Inhaler supporting asthma and COPD patients during inhalation

Learn more

Mechanical ventilators

Precise and safe patient ventilation using ventilator flow sensors

Learn more

Latest Differential pressure sensors

Explore
Digital differential pressure sensor (±500 Pa)

SDP31

Digital differential pressure sensor (±500 Pa)

  • Differential pressure sensors
Digital differential pressure sensor (±1500 Pa)

SDP33

Digital differential pressure sensor (±1500 Pa)

  • Differential pressure sensors
Analog differential pressure sensor (±500 Pa)

SDP36

Analog differential pressure sensor (±500 Pa)

  • Differential pressure sensors
Analog differential pressure sensor (±125 Pa)

SDP37

Analog differential pressure sensor (±125 Pa)

  • Differential pressure sensors
Differential pressure evaluation kit SDP31

SEK-SDP31

Differential pressure evaluation kit SDP31

  • Differential pressure sensors
Digital DP sensor (±125 Pa), tube connection

SDP810-125Pa

Digital DP sensor (±125 Pa), tube connection

  • Differential pressure sensors
Digital DP sensor (±500 Pa), tube connection

SDP811-500Pa

Digital DP sensor (±500 Pa), tube connection

  • Differential pressure sensors