Open Channel flow measurement is usually not done directly by flow meters but is may be done using the techinque of measuing the height of the flowing liquid as is passes a restriction. While not true flowmeters as normally defined, this type of flow measurement is useful in situations such as streams or rivers where the flow is not confined within a pipe.
Water Quality Sensors
The following Water Quality Sensors are available that fit your specifications. Please click on a sensor model name below to read more about that water sensor.