SteelMass 640s – Sierra Thermal Mass Flowmeter

Insertion Gas Mass Flow Meter

Sierra’s SteelMass Model 640S delivers precise measurements for heavy-duty industrial gas mass and air flow meter measurement applications. This insertion thermal mass air/gas flow meter offers precision SCFM (standard cubic feet per minute), SFPM (surface feet per minute) and SMPS (standard meters per second)  measurement of gas mass flow rate in industrial environments

  • Insertion, totalising air/gas mass flow meter
  • Eliminate drift with patented DrySense™ sensor
  • Increase flexibility with low pressure drop, high turndown
  • Validate in the field for easy in-situ calibration
  • Backed by lifetime sensor warranty

Product Benefits

  • Features our patented zero drift DrySense™ velocity sensor: Watch video…
  • Lifetime warranty on sensor
  • Sierra’s state-of-the-art ISO 9000 closed loop calibration facility matches each application for best accuracy
  • Greenhouse Gas (GHG) certified to meet EPA (40 CFR Part 98)
  • Optimized (CH4) as well as N20, SF6, HFCs, PFCs and CO2, per the EPA mandate
  • Popular choice for landfill gas (LFG) measurement at low pressure (20 – 40 mBarg) and about 40-60°C (100°F) variable flows require a large turndown
  • Custom options available:
    • Wide range of process connections
    • Low and high pressure hot tap
    • High temperature option 750°F (400°C)
    • Self-cleaning purge  for dirty flow environments
    • Axial probe design for dirty flow environments
    • Longer probe lengths
    • Multipoint flow averaging arrays for very large ducts
  • Flow-range adjustment and validation and diagnostics
  • Dual-range capability
  • Field validation/configuration to assure operating performance:
  • Field rangeability
  • Flow totalizer and alarms
  • Large LCD display and pushbutton interface, remote enclosure mounting available
  • Small-diameter, 3/4 in. (19.1 mm) sensor probe
  • Range of process connections (including hot tap)
  • Pipe/duct sizes up to 72 inches (2M)
  • An inline flow conditioned version is also available – Model 780S
  • Very low pressure drop
  • No moving parts
  • Free computer interface software: Download now…
  • Digital communications: Foundation Fieldbus, HART, Modbus RTU, Profibus DP

Datasheet – PDF