All our sensors

AL4 Series Gauge or Differential Pressure Sensor Digital Output 1% FS Accuracy
Pressure Medium: Air/Gas
Sensor Type: Gauge, Differential
Supply Voltage: Under 5V, 5V
Output Signal: Digital
Pressure Range: Under 4” H2O, 4” H2O to 3 psi
Kind: Board Level

The AL4 pressure sensor is a digital output low pressure sensor. It is composed of a silicon piezoresistive pressure sensing chip and a signal conditioning integrated circuit. 

The low level signal from the sensing chip is amplified, temperature-compensated, calibrated and converted to digital data that is proportional to the applied pressure. Gauge or differential pressure sensor. New version specific for medical ventilator applications (get specification below).


  • Differential version now available!
  • Gauge - positive, negative and bi-directional
  • Various pressure ranges from 0-1 kPa (.145 psi) up to 0-10 kPa (1.45 psi), depending on model
  • Pressure media: non-corrosive gases
  • Supply voltage (constant voltage): 5 +/-0.25 VDC or 3.3VDC or 3.0 VDC
  • Accuracy of ±1% FS 
  • Dual barbed ports
  • Small size of 11.36 mm x 10.32 mm x 10.32 mm SMT package

Typical Uses

  • Battery-operated devices
  • Medical equipment
  • Industrial pneumatic devices
  • Consumer devices

Let us help you compare price/performance with your current solution if you are not already a Servoflo customer!