BS 5857-1.4 is an International Standard that discusses the fluid flow in closed conduits, using tracers.
BS 5857-1.4 specifies the transit time method using non-radioactive tracers for the measurement of water flow rate in closed conduits.
BS 5857-1.4 gives the technical specifications of the grid electrode in a rectangular conduit.
BS 5857-1.4 on transit time method is useful for:
Flow-rate measurement by the transit time method (formerly called “Allen velocity method”) is based on measuring the transit time of “labelled” fluid particles between two cross-sections of the conduit a known distance apart.
BS 5857-1.4 is the sixth part of a series of standards covering tracer methods of water flow measurement in closed conduits. BS 5857-1.4 assists with the general requirements of tracer for the transit time method and helps in making a better choice of measuring length. BS 5857-1.4 provides you with the guidelines for the various test methods and their procedures. BS 5857-1.4 helps you in calculating the transit time and guides you in estimating the separation and dispersion of recorded traces.
By adopting, BS 5857-1.4 you can learn about the methods for measurement of fluid flow in closed conduits, using tracers which can help you in understanding the methods of hydraulic measurements.