SteelMass 640S Mass Flow Meter

Sierra Instruments’ Steel-MassTM Model 640S immersible thermal mass flow meter is designed for the toughest industrial gas flow measurement applications.

The versatile microprocessor-based transmitter integrates the functions of flow measurement, flow-range adjustment, meter validation and diagnostics in either a probe-mounted or remote housing. Mass flow rate and totalized flow, as well as other configuration variables, are displayed on the optional 2 x 12 LCD display. The programmable transmitter is easily configured via an RS-232 communication port and FLOWMETH's and Sierra's Smart InterfaceTM software, or via the display and magnetic switches on the instrument. FLOWMETH's and Sierra's state-of-the-art calibration facility insures that the calibration will match the application, and our patented Dry- SenseTM thermal sensor insures the Model 640S will hold this calibration over time. Our Smart InterfaceTM software guides you through a procedure to fully validate instrument performance, thus field-verifying meter functionality. The meter is available with a variety of input power, output signal, mounting and packaging options.

  • Direct mass flow monitoring eliminates need for separate temperature and pressure inputs 
  • Accuracy +/- 1% of reading plus 0.5% of full scale 
  • Patented Dry-SenseTM technology elimi- nates sensor drift 
  • State-of-the-art calibration facility insures a highly accurate calibration that matches the application 
  • Field validation of meter electronics and sensor resistance verifies flow meter performance 
  • One-second response to changes in flow rate 
  • FM, CSA, PED, ATEX and GOST R/RTN certified for hazardous areas 
  • CE approved 
  • High temperature option to 750°F (400°C) available 
  • Multipoint options available 
  • Integrated self-cleaning purge option available for dirty flows 
  • Low and high pressure hot taps available 
  • Optional MODBUS, Foundation Fieldbus and Profibus PA available