SteelMass 640s

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SteelMass 640s

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Sierra Instruments’ SteelMass 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



  • Direct mass flow monitoring eliminates need for separate temperature and pressure inputs
  • Accuracy +/- 1% of reading plus 0.5% of full scale
  • Patented Dry-Sense™ technology eliminates 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 HART, Modbus and Profibus DP available, Foundation Fieldbus
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