ISO 6416 describes the establishment and operation of an ultrasonic (transit-time) gauging station for the continuous measurement of discharge in a river, an open channel or a closed conduit. It also describes the basic principles on which the method is based, the operation and performance of associated instrumentation and procedures for commissioning.It is limited to the "transit time of ultrasonic pulses" technique, and is not applicable to systems that make use of the "Doppler shift" or "correlation" or "level-to-flow" techniques.ISO 6416 is not applicable to measurement in rivers with ice.NOTE ISO 6416 focuses on open channel flow measurement. IEC 60041 covers the use of the technique for full pipe flow measurement.                          
                          
                          
                            
                                
                                    
                                        Document identifier
                                        ISO 6416:2017
                                     
                                    
                                        Title
                                        Hydrometry - Measurement of discharge by the ultrasonic transit time (time of flight) method
                                     
                                                                        
                                        ISO Category
                                        TC 113/SC 1: Velocity area methods
                                     
                                    
                                    
                                        Publication date
                                        2017-10-01
                                     
                                                                        
                                    
                                        International Relationship
                                        
                                            BS EN ISO 6416:2017                                        
                                     
                                    
                                    
                                    
                                        History of version
                                        
                                        ISO 6416:2017 * ISO 6416:2004 * ISO 6416:1992                                        
                                     
                                    
                                    
                                    
                                    
                                    
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