Series A4 Digital Differential Pressure Control


The Series A4 digital differential pressure controller is a patent pending microprocessor based pressure controller for positive, negative, and differential pressure as well as velocity and flow. The Series A4 differential pressure controller includes (2) 8A SPDT relays, and an optional digitally scalable 4-20 mA output. The programmable control allows full configuration of variables such as setpoints, dead band, engineering units, flow coefficients, and more.


  • Mounts in Industry Standard Holes
  • 1.6” (41 mm) Panel Depth
  • OLED Program Display
  • Measures Flow & Velocity
  • Optional 4-20 mA Output
  • Universal Power 24-240 VAC / VDC
  • (2) 8A SPDT Relays