Need Sensor to detect presence of water in pipe line

[Shahdad Marri]

Please suggest me sensor for detect presence of water in pipeline , when the water available in main water line then sensor send signal to system .

[mfalkvidd]

Welcome to the MySensors forum @shahdad-marri
Can you share some more information?
What material is the pipe made of?
How large is the pipe?
Can you open and place a sensor inside the pipe?
Is the water drinking water, sewage or something else?
Is the pipe oriented vertically or horizontally?
Will the pipe either be completely full or completely empty, or can there be varying degrees of water in it?
Does the sensor need to be battery powered, or is there access to mains power?
Do you have a price range in mind?