Greyline area-velocity flowmeters with sealed, submersible ultrasonic sensors measure flow through open channels, partially full pipes and surcharged pipes without a flume or weir.
Use the AVFM 6.1 Area-Velocity Flowmeter for permanent installations including municipal storm water, sewage, combined and irrigation water. The AVFM 6.1 displays and totalizes flow, and includes 4-20mA outputs, control relays, and 26 million point-data logger standards. Modbus serial communications output is optional.
Use the battery-powered Stingray 2.0 Portable Level-Velocity Logger for flow surveys, spot checks, sewer infiltration and inflow studies for applications, including municipal storm water, sewage, combined and irrigation water. The Stingray data logs for long periods with standard D-cell Alkaline batteries.
Use the MantaRay Portable Area-Velocity Flowmeter for portable flow monitoring in municipal storm water, sewage, combined, and irrigation water. The built-in rechargeable battery allows for flow studies weeks at a time, or for continuous use up to 8 hours at a time. View flow rate and total on the large, backlit LCD display, connect to samplers with 4-20mA and relay outputs, and download log files from the 2 million point-standard data loggers to USB memory sticks.