What is TORBAR? How does it work?

What is TORBAR?

The TORBAR is a self-averaging flow meter with multiple ports. Its design is similar to that of a pitot tube, which is used to measure fluid flow.

How does TORBAR work?

TORBAR generates an average differential pressure (DP) signal proportional to the flow rate squared.

Typically, the DP output is piped to a differential pressure transmitter, which generates an electric current signal proportional to the flow rate. The DP transmitter can be mounted directly TORBAR in some applications thanks to an integrated 3-valve manifold. Including mass tribal pressure and temperature compensation.

The TORBAR is a double-chamber tube with multiple sensing ports in both chambers. An average pitot tube measures the flow by checking the pressure average at different ports. At a typical flow meter, low pressure and high-pressure chambers and multiple ports penetrate each other.

The ports in one compartment face up and the other ports face down. Adding probes to the flow stream creates dynamic (impact pressure) and static pressure. The upstream ports and downstream of the probe collect the sample, respectively, and the dynamic pressure and static pressure, respectively. A readout instrument or transmitter measures the differential pressure between chambers.

This flow element creates differential pressure when added to the flow stream. It is in upstream and downstream, and this differential pressure generating device gives the flow signal when combined with the differential pressure transmitter.

The cross-sectional area and flow coefficient of the pipe gives the volumetric flow rate as the fluid velocity increases. Manufacturers refer to flow coefficients when supplying the tube, which varies with tube diameter and pipeline diameter.


  • High accuracy.
  • Flexible design.
  • Wide range of processes and their conditions from high vacuum to high pressure.
  • The installation is a low-cost solution for measurement in large diameter pipes or ducts.
  • Can be installed easily, with low-pressure loss, robust construction, and negligible wear.


  • Fluids should be clean, and consideration should be given to the acceptable size of solid particles within a range specified by the supplier.
  • High accuracy only with high-velocity fluids.


Useful for mapping flow profiles in large-sized ducts and channels.