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AP4 & AG4 Series Gauge Digital Pressure Sensor
Pressure Medium: Air/Gas
Sensor Type: Gauge
Supply Voltage: Under 5V, 5V
Output Signal: Digital
Pressure Range: 3-300 psi
Kind: Board Level

The AP4/AG4 gauge pressure sensor series is composed of a silicon piezeoresistive pressure sensing chip and a signal conditioning integrated circuit. The low-level signal from the sensing chip is amplified, temperature-compensated, calibrated and finally converted to digital data that is proportional with the applied pressure. 

The AG version is in a surface mount package. Pressure ranges include: 25 kPa, 50 kPa, 100 kPa, 200 kPa, 500 kPa and 1 MPa.


  • 3 mm or 6 mm pressure port for AG4, surface-mount
  • 3 mm or 6 mm port, dual-in-line package AP4
  • Various pressure ranges from 0-25 kPa up to 0-1000 kPa, depending on model
  • Pressure type: Gauge pressure / Gauge negative pressure
  • Pressure media: non-corrosive gases
  • Supply voltage (constant voltage): 5 +/-0.25 VDC or 3.3VDC or 3.0 VDC
  • Accuracy of ±1.5% FS for 5.0 VDC or 3.3  VDC versions or ±2.0% FS for 3.0 VDC version

Typical Uses

  • Industrial instrumentation
  • Flow measurements
  • HVAC applications
  • Non-invasive blood pressure monitor
  • Deep vein thrombosis
  • Oxygen concentrators
  • Air mattresses
  • Pneumatic devices

Comparing AP/AG with Freescale