Sierra Instruments, Inc.

- Model 241S - Insertion Vortex Flow Meters

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Sierra was the first to introduce multivariable mass vortex flow meters to the market in the late 1990s with the InnovaMass 'S-Series' product line--the 240S and 241S. The InnovaMass 240S inline version is a true workhorse in applications ranging from large pipes and ducts, to high pressure and saturated or superheated steam. The InnovaMass 241S is manufactured as a volumetric only version or a multivariable version.

The iSeries Has Arrived!

Today, our next generation vortex product line, the 'iSeries' InnovaMass 240i and 241i , is fully redesigned with new cutting-edge innovation, featuring Sierra's proprietary Raptor II OS flow engine and robust Smart Interface Portal (SIP) for easy field validation.  Learn More.

Reduce Costs with Just One Process Connection

Five-In-One: The multivariable version of the Sierra's vortex flow meters allows one instrument and one process connection to measure five process parameters at the same time to simultaneously measure mass flow rate, temperature, pressure, volumetric flow rate, and fluid density.

  • Insertion probe for pipes and ducts up to 72 inches (2M); Optional hot tap
  • Highly reliable with no moving parts
  • Loop power option available
  • Rugged, long-lasting design for the industrial applications
  • For fast delivery, buy online, next-day shipment

  • Mass or volumetric flow monitoring of gases, liquids or steam
  • Ideal for pipes and ducts up to 72 inches (2M). See next generation 241i.
  • Measures five process variables with one process connection
    • Mass flow rate
    • Volumetric flow rate
    • Temperature
    • Pressure
    • Fluid density
  • Low-cost alternative to Coriolis meters for large pipes and ducts
  • Easy single-point installation; hot tap and hot tap retractor available
  • Sensors located behind bluff body are well protected from pressure shocks and water hammer
  • Large LCD display and pushbutton interface; remote enclosure mounting available
  • Display of simultaneous total flow rates and process diagnosis
  • Loop-powered design simplifies wiring and signal processing
  • AGA-8 algorithms for natural gas
  • Optional BTU measurement for steam and water
  • Fully field configurable
  • Rangeable down to Reynold's number of 5000
  • Precision platinum RTD
  • Complex density calculations performed without need for separate flow computer
  • Field validation/configuration to assure operating performance
  • Flow totalizer and alarms

  • Fluids measured: steam, gases and liquids
  • Up to 72 inches (2 m) available;
  • Pipe sizes from 0.5 to 8 inches (1.3  to 20.3 cm); See 240Sor next generation 240i
  • Accuracy:
    • Mass flow: +/- 1% of reading (liquids); +/- 2% of reading (gas & steam)
    • Volumetric: +/- 1.2% of reading (liquids); +/- 1.5% of reading (gas & steam)
  • Repeatability:
    • Mass flow rate: +/- 0.2% of ful scale
    • Volumetric flow rate: +/- 0.1% of scale
    • Temperature: +/- 0.2°F (+/- 0.1°C)
    • Pressure: +/- 0.05% of full scale
    • Density: +/- 0.1% of full scale
  • Rangeability up to 30:1 (accuracy maintained across entire range)
  • Process fluid temperature:
    • Standard: -40°F to 500°F (-40°C to 260°C)
    • High temperature (HT): up to 750°F (400°C)
  • Ambient temperature:
  • Operating: -5°F to 140°F (-20° to 60°C)
  • Storage: -40°F to 150°F (-40° to 65°C) 0 to 98% relative humidity, noncondensing conditions
  • Process pressure:
    • Standard: up to 1500 psia (100 bara)
    • High pressure to 5000 psig (345 barg)
  • Response time is adjustable from 1 to 100 seconds
  • Power supply options:
    • 12 to 36 VDC, 100 mA (add 20 mA per output up to 60 mA)
    • 100 to 240 VAC, 50/60 Hz, 25 watts
    • Active loop, loop powered with 4 to 20ma output
  • 316 stainless steel construction (other materials available)
  • Output signals:
    • 3 programmable 4 to 20 mA  
    • User definable pulse output for totalized flow
  • Hazardous-Area Location Enclosure (IP66) and NEMA 4X (IP65)
  • Digital communications: RS-485, Modbus RTU, HART (with DD), BACnet  See next generation 241i.
  • Approvals:
    • FM
    • CSA
    • ATEX
    • IECEx
    • CE

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