InnovaMass 240/241 VTP Vortex Flow Meter

Sierra was the first to introduce a multivariable mass vortex flow meter to the market in the late 1990’s. Sierra’s multivariable product line features an in-line version, the InnovaMass® 240 and a unique insertion version, the InnovaMass® 241.


The 241 has emerged recently as the proven instrument of choice in geothermal steam applications across the globe. Both the 240 and 241 measure the mass flow rate of any gas or liquid and are ideally suited for saturated or superheated steam. The InnovaMass offers customers one instrument and one process connection, measuring five process parameters simultaneously: mass flow rate, temperature, pressure, volumetric flow rate, and

fluid density.

The 241 is available in high-pressure versions capable of mass flow measurement up to 5000 psig (345
barg), and the 240 cryogenic version is widely used for fluids down to -330°F (-200°C). All models are fully field-programmable, configurable and feature RS-485, MODBUS or HART protocols. InnovaMass is a true high performance, rugged, and reliable workhorse in industry.

  • Mass and volumetric flow measurement of gas, liquid, and steam 
  • Multivariable outputs for five process parameters: 
mass flow rate
volumetric flow rate
  • temperature
  • single process connection 
  • In-line (1/2 inch to 8 inch) and insertion (into pipes > 2 inch) configurations 
  • Field-configurable ranges, alarms, outputs and displays 
  • Field configurable via six push buttons or magnet through explosion-proof window 
  • Smart DSP electronics extends low flow range down to a Reynolds number of 5000 
  • Rangeability up to 30:1 
  • Temperature -330°F (-200°C) up to 750°F (400°C) 
  • Cryogenic version measures liquid O , N , Ar, 22 and CO2 down to -330°F (-200°C)
  • Pressure up to 1500 psig (100 barg) 
  • High pressure version to 5000 psig (345 barg) 
  • Ideal for steam applications 
  • Flow computer integrates AGA-8 equations for natural gas 
  • Full implementation of HART protocol 
  • Optional MODBUS protocol 
  • FMC and ATEX approval