How It Works: Doppler Flow

Doppler flow meters measure flow from outside a pipe with a clamp-on sensor. Greyline Doppler meters continuously transmit high frequency sound (640MHz) that travels through the pipe wall and into the flowing liquid. Sound is reflected back to the sensor from solids or bubbles in the fluid. If the fluid is in motion, the echoes return at an altered frequency proportionate to flow velocity. Doppler flow meters continuously measure this frequency shift to calculate flow. Learn more about Greyline Instruments at www.greyline.com ============================= Like us on Facebook:   / greyline-instruments-inc-312237172172101   Follow us on Twitter:   / greylineinst   Follow us on LinkedIn:   / greyline-instruments