SM9543 digital differential pressure sensor by AMSYS

digital differential pressure sensor SM9543

The digital pressure sensors in the SM9543 series are digital OEM sensors* which can measure the bidirectional differential pressure in the low pressure range (± 5 mbar).

The fully calibrated SM9543 sensor is supplied in a standard SOIC16 package with two vertical pressure connectors for SMD assembly. Pressure-proportional information in I2C format acts as an output signal. This makes the SM9543 an autonomous sensor which does not require any additional circuitry.

SM9543 devices are suitable for reflow soldering and automatic assembly on a PCB.

Variants of SM9543

SM9543-005M-D-C-3-D: bidirectional differential pressure sensor for ±5 mbar


  • Pressure range: ±5 mbar
  • Temperature range: -5 to 65°C
  • Pressure resolution: 14 bits
  • Supply voltage: 3.3 V
  • Current consumption: 2.0 mA
  • I²C interface
  • SOIC16 package for SMD assembly
  • RoHS and REACH compliant


  • Medical technology (sleep apnea monitors, CPAP, negative pressure wound therapy devices, respirators)
  • HVAC
  • Fans
  • Gas flows
  • Airstream measurement
  • Environmental control measurement systems

For information on prices and delivery times or if you have any technical questions, please contact