| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow meter for preventing a measurement range from being limited by a passing flow rate.SOLUTION: A flow meter 5 comprises: a flow meter 2 for small flow rate and a flow meter 3 for large flow rate disposed in series with a channel 1 through which measurement fluid flows; and pressure control means 4 mounted in parallel with the flow meter 2 for small flow rate, and configured to automatically open a valve when a predetermined pressure value is set. The flow meter 2 for small flow rate and the flow meter 3 for large flow rate are configured such that it is possible to accurately measure a wide flow rate range from the minimum measurement flow rate of the flow meter 2 for small flow rate to the maximum measurement flow rate of the flow meter 3 for large flow rate by automatically switching the path of the channel 1 by the pressure control means 4. |
