Greyline Instruments Portable Area-Velocity Flow Meter - Manta Ray Aerosol Monitors included with the Vis 350

included with the Vis 350 are 2 batteries for extended use in the field when AC power is not available

the digital readout and polarity indicators will help you to visually pinpoint the target and

the Arrow 100 works smoothly with both

Features/Advantages over coaxial units:

built in casing hanger that allows the unit to be suspended on the casing while the results are being recorded

Greyline Instruments Portable Area-Velocity Flow Meter - Manta Ray Aerosol Monitors included with the Vis 350The MantaRay Portable Area Velocity Flow Meter measures flow in open channels, partially filled and surcharged pipes using an ultrasonic sensor. It's designed for monitoring stormwater, sewage, industrial effluent, irrigation water and natural streams. The MantaRay displays and datalogs flow rate and total flow and connects to samplers, SCADA and telemetry systems. Calibration is simple: enter the pipe diameter or channel dimensions and the MantaRay