Flow Open Channels Without Restrictions Models Applications AVFM 5.0 measures the level and the velocity of the fluid in order to calculate the flow rate into an open channel or a pipe. Stingray water level, velocity, and temperature in open channels and partially filled pipes quotation request, technical info, special application? Information requestYour e-mail Your message Accept privacy policyPowered by ChronoForms - ChronoEngine.com.