Sierra

Sierra Instruments manufacturers high performance mass flow meters and mass flow controllers for nearly any gas, liquid, or steam application. Thermal Mass, Transit-Time Ultrasonic, Vortex Shedding and Multivariable flow meters are available in both standard and customized versions for applications in laboratory, industrial, and hazardous environments. Sierra's flow measurement technologies precisely measure or control very low flows down to less than 1 sccm full scale as well as extremely high flows of gas, liquid, and steam.

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Sierra Industrial Thermal Mass Flowmeters
Click Photo for Spec Sheet Description Accuracy, Flow range Gas & Max. Pressures Input Power Output Signals Features
QuadraTherm? 640i
QuadraTherm? 640i thermal mass meter

QuadraTherm introduces the first four-sensor thermal mass flow meter design?three precision platinum temperature sensors and one patented DrySense mass velocity sensor backed by a lifetime warranty

  • Accuracy: +/- 0.75% of reading above 50% of full scale.
  • 3/4" (19.1 mm) insertion probe up to 72" (2m) long.

  • Most gases compatible with 316 L stainless steel
  • Pressures: NPT & compression fittings 500psi (35bar); flange ratings as appropriate

 

  •  18-30 Vdc 100 to 240 Vac, 50/60 Hz (optional)

  •  0-5 Vdc 0-10 Vdc
  • 4-20 mA
  • Pulse
  • Modbus FFB Profibus RS232

QuadraTherm? 780i
QuadraTherm? 780iQuadraTherm? 780i

Inline version with built-in flow conditioning; multivariable outputs, flow ranges up to 60,000 sfpm (305 smps), iTherm? Dial-A-Gas®, Dial-A-Pipe, Hazardous Area approvals, Digital Communications (pending)

  • Accuracy: +/- 0.5% of Reading above 50% of FS
  • Flow range 0-60,000 sfpm (305 smps)

  • Most gases compatible with 316 L stainless steel
  • Pressures: NPT & compression fittings 500psi (35bar); flange ratings as appropriate

  • 18-30 Vdc 100 to 240 Vac, 50/60 Hz (optional)

  • 0-5 Vdc 0-10 Vdc
  • 4-20 mA
  • Pulse
  • Modbus FFB Profibus RS232

  • 100:1 Turndown
  • Built-in flow conditioning minimizes upstream pipe runs
  • Multivariable: Mass flow rate, temperature & pressure
  • Revolutionary QuadraTherm? four-sensor design
  • DrySense? no-drift sensor with lifetime warranty

640S Steel-Mass?
640S Steel-Mass?

Insertion mass flow meters; NEMA 4X and Hazardous Area Approvals: FM, ATEX, CSA, EEx, PED, CE, Cenelec; Smart electronics; Insertion probe lengths 6? to 36?

+/- 2% of reading from 10% to 100% of calibrated range & 0.5% of full scale below 10%; 0.2% repeatability Flow range up to 20000 sfpm

  • Most gases compatible with 316 L stainless steel
  • Pressures: NPT & compression fittings 500psi (35bar); flange ratings as appropriate

18-30 Vdc 100 to 240 Vac, 50/60 Hz (optional)

  • 0-5 Vdc 0-10 Vdc
  • 4-20 mA
  • Pulse
  • Modbus FFB Profibus RS232

  • Field Validation
  • Low pressure drop
  • Alarms and Totaliser
  • Low-flow cut off
  • Robust

780S Flat-Trak?
780S Flat-Trak?

In-line mass flow meters; NEMA 4X and Hazardous Area Approvals: FM, ATEX, CSA, EEx, PED, CE, Cenelec; Smart electronics; Body size 1/4" to 8" NPT, Buttweld or ANSI

  • Accuracy is +/-1% of reading, 0.5% of full scale repeatability
  • Flow Range: 0-0.7 nm³/h to 0-20000 nm³/h

  • Most gases compatible with 316 L stainless steel
  • Pressures: 500psi (35bar) NPT, flange ratings as appropriate

  • 18-30 Vdc
  • 100 to 240 Vac, 50/60 Hz (optional)

  • 0-5 Vdc 0-10 Vdc
  • 4-20 mA
  • Pulse
  • Modbus FFB Profibus RS232

  • Field Validation
  • Low pressure drop
  • Alarms and Totaliser
  • Low-flow cut off
  • Robust
  • Built in flow conditioners provide compact installation

670S Multi-Trak?
670S Multi-Trak?

High-Performance Multi-Point Mass Flow Meter System For Large Ducts & Stacks that have non-uniform velocity profiles, high turn-down requirements, dirty gas streams, wide temperature ranges and fast velocity and temperature changes. CE, CSA, ATEX, FM, IP65. With Sierra HMI.

Accuracy +/- 1 % of reading plus 0.5% of full scale.

Most gases compatible with 316 L stainless steel. Pressures: up to 70barg. Temperatures to 177°C (option: 400°C).

18-30 Vdc (regulated), 825 mA per point

Linear 4-20 mA proportional to grand-average flow signal

Innovative and user-friendly HMI offers advances over industry- standard collector boxes and allows users to:

  • Average the flow of 2-4 meters (and removes meters from the average under alarm or user selected conditions)
  • Convert flow units
  • Set up the density of the gas for mass
  • flow measurement
  • Easily configure the individual meters
  • Set up alarms
780S-UHP Ultra High Purity?
780S-UHP Ultra High Purity?

Ultra-High-Purity In-Line mass flow meter; NEMA 4X and Hazardous Area, Approvals: FM, ATEX, CSA, EEx, PED, CE, Cenelec; Smart electronics; flow body sizes from 3/8? to 6?.

  • +/- 1% of reading + 0.5% of full scale;
  • 0.2%FS repeatability
  • Flow range up to 5000 scfm

Most gases compatible with 316L stainless steel

18-30 Vdc 100 to 240 Vac, 50/60 Hz (optional)

  • 0-5 Vdc 0-10 Vdc
  • 4-20 mA
  • Pulse
  • Modbus FFB Profibus RS232

  • Field Validation
  • Low pressure drop,
  • Alarms, Totaliser,
  • Low-flow cut off,
  • 7-10 Ra or 20-25 Ra finish

620S Fast-Flo®
620S Fast-Flo®

Fast response (200ms) insertion mass flow meters for light-industrial use; NEMA 4X; Smart electronics; Insertion probe lengths 3.9? to 24?

  • +/-1% of full scale & 0.2% repeatability
  • Flow range up to 20000 sfpm

Most non-combustible, non-corrosive gases

18-30 Vdc

0-5 Vdc 0-10 Vdc 4-20 mA

  • Field Validation
  • Low pressure drop
  • Alarms Totaliser,
  • Low-flow cut off
  • Fast response