Sierra - Model FlatTrak 780S -Inline Thermal Mass Flow Meters with Flow Conditioning

North America`s #1 selling inline thermal mass flow meter (2009 Flow Research, Boston MA) delivers precise measurements with heavy-duty industrial gas mass and inline CFM air flow meters. Choose from a wide variety of inline and insertion thermal mass air flow meters for precision CFM (cubic feet per minute) measurement of gas mass flow rate in industrial environments. 

The thermal meter:

• Incorporates Sierra’s unique dual-plate flow conditioning element to eliminate velocity profile distortions, as well as swirl and temperature stratification in the gas stream
• Reduces piping straight run requirements to as little as three upstream diameters
• Saves you money on installation costs when compared to an orifice-plate where at least 20 upstream piping diameters are required for optimal performance

The 780S is GHG certified and routinely used to measure gas to boilers and burners and other process equipment, air volume flow metering, compressed air flow, combustion air flow, natural gas fuel flow, custody transfer and stack gas emissions flow monitoring.Operating Principal: Thermal dispersion technology for direct mass flow measurement featuring no pressure or temperature compensation needed, no moving parts, low pressure drop, high turndown.

Watch the video to learn about Thermal Principle of Operation for thermal mass meters.

• Built-in flow conditioning elements drastically reduce upstream straight-run requirements
• Features our no-drift DrySense velocity sensor
• Lifetime warranty on sensor
• 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
  • Wide range of materials like Kynar and Hastalloy
  • Self-cleaning purge  for dirty flow environments
  • Ultra-High Purity 7-10 Ra to 20-25Ra interior finishes

• 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
• An insertion version for pipes/ducts up to 72" (2M) available - Model 640S
• Very low pressure drop
• No moving parts
• Free computer interface software
• Digital communications: Modbus RTU

• Accuracy: +/- 1% of reading plus +/-0.5% of full scale
• Repeatability of +/- 0.2% of full scale
• Pipe sizes from 1.0" to 8.0"  (2.5cm  to 20.3cm) 
• Flow range to 20,000 sfpm (100 smps)
• 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
• 100:1 turndown
• Temperature:
  • Gas: -40°F (-40°C) to 350°F (200°C)
  • Ambient: -40° F to 120° F (-40° C to 50° C)
• Response time is one second to achieve 63% of final value
• Power supply 18 to 30 VDC (regulated), 625 mA maximum; 100 to 240 VAC, 50/60 Hz, 15 watts maximum
• 316 stainless-steel construction (Other materials available)
• Output signals: RS-232, 0–5 VDC, 0-10 VDC, 4–20 mA  
• User definable pulse output for totalized flow
• Digital communications solutions include: Modbus RTU
• Hazardous-Area Location Enclosure (IP66) and NEMA 4X (IP65)
• Approvals:
  • FM (USA) Class I, Div I, Groups B,C,D
  • CSA and CRN (Canada)
  • CE
  • PED (EU)
  • GOST R (Russian Federation)
  • Chinese Pattern Approval (China)

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