Mass Flow - Digital

HFM-D-300A Digital Mass Flow Meter

HFM-D-300A Digital Mass Flow Meter

The A Series of the Digital 300 line of thermal mass flow meters and controllers utilizes a 15-pin D-sub connector which is compatible with Teledyne Hastings’ power supplies and cables. The Series also employs dual RJ communication ports for RS232/RS485 communications. The A Series is backwards compatible with previous versions of Teledyne’s Digital 300. Also, the A Series can be configured with the optional IP67 enclosure to provide protection against water and dust.


  • Available Flow Ranges:
    • 0-5 sccm up to 0-25 slm (N2 Equivalent)
  • Excellent Accuracy ±(0.5% of Reading +0.2% of Full Scale)
  • All-Metal Seals
  • 0-5 VDC, 0-10 VDC, 0-20 mA or 4-20 mA I/O
  • RS232 / RS485
  • Typical Settling Time:
    • HFM-D-300 < 1 second
    • HFC-D-302 1-2 seconds
  • Status LEDs
  • Auto-Zero (HFC-D-302 Controller Only)
  • Totalizer
  • IP-67 Enclosure Available (“A” Series)
  • Large Diameter Sensor Tube (low dP)
  • Operating Pressures to 500 psi or higher
  • NIST Traceable Calibration


  • Leak Testing
  • High Purity Gas Delivery
  • Thin Film Deposition
  • Gas Blending
  • Pharmaceutical
  • Fuel Cell R&D
  • Enviromental Monitoring
  • Medical Research


  • High Accuracy
  • Fast Metering Response
  • Superior Linearity
  • Rapid Controller Settling Time
  • Digital Extended Range