Insertion Multiparameter Mass Vortex Flow Meter - InnovaMass® 241 VTP

Insertion Multivariable Mass Flow Meter

Sierra's Model 241 provides a direct reading of mass flow rate from a single entry point in the process line and provides analog and digital outputs of five process variables: mass flow rate, volumetric flow rate, temperature, pressure, and fluid density. The unique insertion design has probe lengths from 2-inches up to 72-inches and can measure air up to 67000 scfm and saturated steam up to 330,000 pounds/hour.

Product accuracy is +/- 1.0% of rate over a 30:1 range for liquids and +/-2.0% of rate over a 30:1 range for gas and steam. Volumetric accuracy is +/- 1.2% of rate over a 30:1 range for liquids and +/-1.5% of rate over a 30:1 range for gas and steam.The Model 241 is hazardous area approved for FM, CSA, ATEX and CE.

 InnovaMass® 241 VTP (Multivariable Vortex Meter)

InnovaMass® 241 VTP (Multivariable Vortex Meter)




Technical Details

Product accuracy is ± 1.0% of rate over a 30:1 range for liquids and +/-2.0% of rate over a 30:1 range for gas and steam. Volumetric accuracy is ± 1.2% of rate over a 30:1 range for liquids and +/-1.5% of rate over a 30:1 range for gas and steam.The Model 241 is hazardous area approved for FM, CSA, ATEX and CE.

Unique Product Features

  • Mass & Volumetric flow monitoring of most gases, liquids and steam
  • Rangeable down to Reynold's number of 5000
  • In-line sizes from 2 " to 72 "
  • Mass flow accuracy is ± 1.0% of rate over a 30:1 range for liquids and +/-2.0% of rate over a 30:1 range for gas and steam
  • Volumetric flow accuracy is ± 1.2% of rate over a 30:1 range for liquids and +/-1.5% of rate over a 30:1 range for gas and steam
  • Fully field configurable
  • Loop powered with 4-20ma outpute
  • No moving parts, very reliable
  • Also measures pressure, temperature and density of process
  • Ex approved for FM, CSA and ATEX
  • Active loop, Loop powered, MODBUS and HART output available
  • Active Flow profile compensation
  • Fully field configurable
  • Easy to Install, lots of installation options (f.i. Hot-tap systems)
  • Digital communications solutions include: BACnet, HART, and Modbus RTU.

Product Information

A unique insertion multivariable vortex mass flow meter, the Model 241 is a true workhorse in large pipe applications, high pressure applications and numerous geothermal steam applications.

Sierra's Model 241 provides a direct reading of mass flow rate from a single entry point in the process line and provides analog and digital outputs of five process variables: mass flow rate, volumetric flow rate, temperature, pressure, and fluid density. The unique insertion design has probe lengths from 2-inches up to 72-inches and can measure air up to 67000 scfm and saturated steam up to 330,000 pounds/hour. In addition, the instrument is available in a high-pressure version capable of mass flow measurement of gases up to 5000 psig. The Model 241 has emerged recently as the proven instrument of choice in geothermal steam applications across the globe. The ability to sense all process conditions in a single location greatly improves measurement accuracy and eliminates the costly requirement for additional line penetrations associated with traditional mass flow measurement systems.

Sierra's digital communications solutions offer engineers and systems integrators, full industrial system integration and networking capability with Sierra's vortex flow meters. Digital communications solutions include: BACnet, HART, and Modbus RTU. This flexibility of communication features offers turnkey solutions for integration of Sierra's vortex flow meters into any industrial automation system or application.

The sophisticated on-board flow computer also incorporates AGA-8 algorithms for natural gas measurement to reducing billing and contract disputes. Smart electronics provide access to all measured variables and programming menus, and permit field-configuration directly from the control panel or workstation via RS485, Modbus, HART, BACnet protocols.


Operating Principle

Sierra’s 240/241 Series multivariable vortex mass flow meters use a unique sensor head to monitor mass flow rate by directly measuring three variables–fluid velocity, temperature and pressure. The built-in flow computer calculates the mass flow rate and volumetric flow rate based on these three direct measurements. The velocity, temperature and pressure sensing head is built into the vortex meter’s flow body. To measure fluid velocity, the flow meter incorporates a bluff body (shedder bar) in the flow stream and measures the frequency of vortices created by the shedder bar. Temperature is measured using a platinum resistance temperature detector (PRTD). Pressure measurement is achieved using a solidstate pressure transducer. All three elements are combined into an integrated sensor head assembly located downstream of the shedder bar within the flow body.