QuadraTherm® 640i | SIERRA Vietnam

Industry's Most Accurate Air / Gas Thermal Insertion Mass Flow Meters QuadraTherm® 640i Achieve high accuracy +/- 0.75% of reading Eliminate drift with patented DrySense™ sensor Validate in the field for easy in-situ calibration Use qMix software to easily change gas composition in the field and retain accuracy Backed by lifetime sensor warranty Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD)
Manufacturer: SIERRA Instruments
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Specifications

  • Accuracy: +/- 0.75% of reading above 50% of full scale*
  • Repeatability: +/- 0.15% of full scale 
  • Flow range 0 to 60,000 sfpm (0 to 305 smps) 
  • Turndown 100:1
  • Measure all inert gases and all non-condensing clean gases
  • Flammable gases: methane, propane, hydrogen, digester gas, natural gas
  • Corrosive gases compatible with 316L stainless steel
  • Gas/ambient temperature: -40°F to 392°F (-40°C to 200°C)
  • 1-inch (25.4 mm) diameter protective sensor shield option for improved sensor protection. Learn more.

*Verified by an independent NIST & NVLAP accredited lab

View All Specs

  • Response time is three seconds to achieve 63% (one time constant) of final value
  • Power supply: 100 to 240 VAC (0.4 Amps RMS at 230 VAC); 24 VDC +/- 10%, 1 Amp
  • 316 stainless steel construction
  • Output signals: RS-232, 4 to 20 mA flow, 4 to 20 mA temperature, 4 to 20 mA pressure (optional)
  • Alarm output (contact SPST/opto relays)
  • User definable pulse output for totalized flow
  • Digital communications: Foundation Fieldbus,HARTModbus RTU, and Profibus DP
  • Hazardous-Area Location Enclosure (IP66)
  • Approvals:
    • cFMus–Explosion proof for Class I, Div I, Groups B,C,D
    • ATEX
    • IECEx
    • GOST R
    • Chinese Pattern
    • CE–European Conformity