AVR-Chat

Jameco has this

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=129120&

you could interface it with a microcontroller and obtain almost any distance within reason.

Brian

--- In AVR-Chat@yahoogroups.com, wagnerj@... wrote:
>
> This might work for small depth changes, such as trying to hold a water
> level constant. But, I would not bet anything on having it work over a 15
> meter range.
> 
> Jim Wagner
> Oregon Research Electronics
> 
> > How about this?
> > A water tight ball with a magnet in it.  A magnetic field sensor at the
> > top of the tank.  The higher the fluid level, the more mag field sensed.
> > Use a permeable tube to hold the floating ball so that it stays
> > more-or-less in one area.  A magnetic sensor sensitive enough for this to
> > work might be pricey though.  This is a kind of fancy way to do the force
> > sensor you suggested with no moving parts but a floating ball. :)
> >
> > DLC
> >
> >> I think I may have an idea. a pressure sensor at the top of the tank and
> >> a
> >> rod extending down into the tank with a plastic ball fixed at the end.
> >> the
> >> higher the water level the more force on the sensor.
> >>
> >> Brian
> >>
> >> --- In AVR-Chat@yahoogroups.com, Muhammad Amiruddin
> >> <amiruddin.muhammad@> wrote:
> >>>
> >>> Dear all,
> >>>  
> >>> please help me,
> >>>  
> >>> i want make project for measuring the level of water on the tank that
> >>> approximately 15 m high. what senssor that i should use ?
> >>>  
> >>> Is there any ultrasonic senssor wich can measure range until 15 m ?
> >>>  
> >>> rgds,
> >>>  
> >>> 4mir
> >>>  
> >>>
> >>>
> >>>
> >>>
> >>> [Non-text portions of this message have been removed]
> >>>
> >>
> >>
> >>
> >>
> >> ------------------------------------
> >>
> >> Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >
> >
> > --
> > Dennis Clark
> > TTT Enterprises
> >
> >
>