SM4XXX Gauge & Differential Pressure Sensors Medium Ranges
Pressure Medium: Air/Gas
Sensor Type: Gauge, Differential
Supply Voltage: Under 5V
Output Signal: Voltage, Digital
Pressure Range: 4” H2O to 3 psi, 3-300 psi
Kind: Board Level

The SM4XXX Series is a digital and analog, medium pressure MEMS sensor family offering state-of-the-art pressure transducer and CMOS mixed signal processing technology to produce a digital, fully-conditioned, multi-order pressure and temperature-compensated sensor in SOIC-16 package with a dual vertical porting option.

It is available in both compound gauge or differential pressure configurations. With the dual porting, a vacuum gauge measurement is possible to minimize altitude errors due to changes in ambient pressure.

The SM4X91 Series has both I2C & analog outputs while the SM4X21 Series has I2C only.

The pressure sensor can be mounted directly on a standard printed circuit board and a high level, calibrated pressure signal can be acquired from the digital interface. This eliminates the need for additional circuitry, such as a compensation network or a microcontroller containing a custom correction algorithm.


  • Pressure ranges from 2.5 psi to 14.9 psi in gauge (SM42X1), differential, (SM43X1) or asymmetrical (SM44X1) configurations
  • I2C digital interface (model is SM4X21) or I2C & analog (SM4x91)
  • Compensated temperature range of -20°C up to 85°C
  • ±1% FS accuracy
  • Insensitive to mounting orientation
  • Robust JEDEC SOIC-16 package


  • Medical - ventilators, oxygenators, fluid evacuation,  negative wound therapy
  • Gas flow instrumentation
  • Airflow monitors
  • Life sciences
  • Safety cabinets and other critical contamination equipment
  • Pneumatic gages
  • Pressure switches
  • Sports equipment
  • Appliances