FastFlo 620s – Sierra Thermal Mass Flowmeter


The FastFlo™ 620S is an insertion thermal mass air flow sensor designed to give you a highly reliable, responsive and affordable mass flow measurement for light industrial applications where a NEMA 4X (IP65) enclosure is acceptable. This mass airflow sensor:

  • Includes a compact, versatile, microprocessor-based transmitter
  • Integrates flow-range adjustments, and meter validation and diagnostics
  • Gives you the ability to “field-validate” your meter’s calibration

Product Benefits

  • Ideal for OEMs and for compressed air monitoring
  • Smart electronics permit field adjustment of critical air flow meter settings
  • Programmable pulse output for remote totalization
  • Minimal flow blockage and low pressure drop
  • Field flow-range adjustment, meter validation and diagnostics
  • Program transmitter via RS-232 using free user software or with three push-buttons on display interface
  • Sierra’s state-of-the-art ISO 9000 calibration facility matches each application for best accuracy
  • Flow-range adjustment and validation and diagnostics
  • Field validation/configuration to ensure operating performance
  • Flow totalizer and alarms
  • 2 x 12 backlit LCD display totalizer values
  • Remote enclosure mounting available
  • No moving parts
  • Free computer interface software

Datasheet – PDF