We require a low-cost flow meter that will work equally well in full, or partially full water pipes and open channels. The device must be able to measure velocity, flow, temperature, and depth. The device will require a Doppler sensor (or some other means) to determine water flow velocity, and a depth sensor to allow the device to calculate the actual water volume (flow rate). In addition, a means to input an irregular cross sectional profile will also be required to provide accurate flows measurements in a natural watercourse such as a river or stream.
Ideally, as additional options, the meter could also measure various water parameters such as salinity.
The device would be installed at the BOTTOM of the pipe or stream and must be capable of operation after being 'dry' when no water is flowing. It will send the data to a cloud-based application in real time via an RS-485 serial interface. The meter should include a data logger to store the readings when communications with the remote site is unavailable or 'batch data' would be more appropriate.
The device will be connected to a separate communication module that will provide power to the device.
Low power consumption is also a priority to allow for installations that rely on solar power.
Please provide a example of similar projects that you have completed.