USBR Water Measurement Manual - Chapter 14 - MEASUREMENTS IN PRESSURE CONDUITS, Section 3. Differential Head Flowmeters
![Amazon.com: Digital Meter Nozzle with Flow Meter, Digital Fuel Oil Nozzle Gun Fueling Nozzle, Oil Nozzle Dispenser Flow Meter, for Measuring the Flow of Pipeline Fluid of Factories, Gas Stations, etc. : Amazon.com: Digital Meter Nozzle with Flow Meter, Digital Fuel Oil Nozzle Gun Fueling Nozzle, Oil Nozzle Dispenser Flow Meter, for Measuring the Flow of Pipeline Fluid of Factories, Gas Stations, etc. :](https://m.media-amazon.com/images/I/51SB6dOQVNL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Digital Meter Nozzle with Flow Meter, Digital Fuel Oil Nozzle Gun Fueling Nozzle, Oil Nozzle Dispenser Flow Meter, for Measuring the Flow of Pipeline Fluid of Factories, Gas Stations, etc. :
![Amazon.com: CDI-026 Aluminum Digital Oil Control Valve Meter Nozzle with Flow Meter for Measuring The Flow of Pipeline Fluid : Industrial & Scientific Amazon.com: CDI-026 Aluminum Digital Oil Control Valve Meter Nozzle with Flow Meter for Measuring The Flow of Pipeline Fluid : Industrial & Scientific](https://m.media-amazon.com/images/I/51ZmuK4Tq+L.jpg)