Flow rate measuring device, flow rate measuring method, pressure measuring device, and pressure measuring method

摘要

The measurement accuracy of the liquid flow rate can be improved, and the repeatability of the measurement value can be improved. The flow rate measuring apparatus includes a light source for emitting light to a measurement target site, a light receiving element for receiving scattered light emitted from the light source and scattered light at the measurement target site, a wavelength of the emitted light and a wavelength of the scattered light And a contact member capable of contacting the measurement target site with respect to the entire surface of the opposing surface facing the measurement target site, and a flow rate for measuring the flow rate of the liquid flowing through the measurement target site based on the scattered light And a measuring unit.