Mainstream Portable AV-Flowmeter
Portable area velocity flow meter
Sutiable for open channels and partially full pipes
Ideal for short term and extended field measurement
Quick to install - no flumes or weirs required
velocity range - 10mm/s to 5m/s
Pulse / SDI-12 / GPRS output options available
High capacity Internal data logger
Smart power saving mode
The Mainstream portable AV-Flow Meter offers a solution to those wanting to measure water velocity, level and flow in an open channel / partially full pipe applications, for short term and extended field measurements. With a loca battery power supply the flow meter can be deployed without the need for an external power source, with one years battery life achievable at 1minute measurement intervals. Onboard data logging also allows for measurement to be taking on a predefined frequency and donwloaded using the PC software and cable.
High Levels of performance
The sensor high sensitivity means the system can be used for a wide range of applications in waste water and even "clean" water applications. With a streamlined probe, the sensor is also able to eliminate fouling and reduces the flow disturbance. Signal quality monitors also offer verification of the data quality.
Exteme protection
Designed for measuerment in the harhest environments the Mainstream Portable AV-flowmeter provides an enclosure environmental protection rating of IP67. Internal electronics however are fully sealed for IP68 protection meaning the unit can be fully submerged with the enclosure lid open.
How does it work?
The Mainstream systems utilise the area velocity method of flow measurement, providing the user with a continuous or time stamped value of flow. Velocity measurement from the sensor is achieved by analysing transmitted and received ultrasound signal. The sensor creates a zone of inspection, here bubbles and solids particles in the water. These then provide a reflection of the ultrasound signal back to the velocity probe. The frequency shift in the ultrasonic signal between the transmitted frequency and that been received provides the flow velocity.
Liquid Level is also measured by a submerged pressure sensor or ultrasonic sensor. When the wetted cross sectional area for the channel / pipe and velocity are known the flow meter is then able to calculate flow rate.
