Mass Flow Sensors

PAV3000 Series Air Velocity Sensor

The PAV3000 was designed as an economical high-performance air velocity sensor in space-constrained spaces such as thermal management & HVAC systems. Unlike thermistor-based solutions, the Posifa MEMS sensor core is minimally affected by ambient temperature changes and provides instant real-time feedback on proper airflow at server blades. 

The sensor die uses a pair of thermopiles to detect changes in temperature gradient caused by mass flow, delivering excellent signal-to-noise and repeatability. The "solid-state" thermal isolation structure on the sensor die eliminates the need for a surface cavity or fragile membrane used in competing technologies, making the sensor resistant to clogging and pressure shock. The PAV3000 is surface mountable and provides a digital I2C output.


  • Various flow ranges of 0-73 m/sec (PAV3005D) or 0-15 m/s (PAV3015D)
  • Highly accurate: 5% of reading
  • Long-term stability with minimal null drift
  • Solid-state sensing core (no surface cavity or fragile membrane, resistant to clogging and pressure shock
  • Fast response time of 125 ms
  • Supply voltage of 3.3VDC
  • Digital I2C output
  • Repeatability of 1%
  • Small size of 7.7 mm long X 8 mm wide
  • Evaluation board available (PAV3000EVB)


  • Data center thermal management
  • HVAC VAV damper control
  • HVAC filter monitoring