Re: water flow detection
Except for clamp on ultrasonic flow meters (and some kind of thermal sensors ), all available methods require to cut the pipe respectively drill a hole into it.
For the selection of suitable methods, some additional information should be given:
- minimum flow to detect
- any accuracy requirements
- is a pressure drop/aperture reduction acceptable
Measurement/sensor principles to consider:
- turbine
- float-type
- ultrasonic doppler
- positive displacement
- differential pressure
- emf (magnetic)
- thermal
- vortex
- coriolis mass flow