Thanks Adam, any advice on which float system to use and where I can get hold of one in the UK? Andy ----- Original Message ----- From: "M. Adam Davis" To: Sent: Monday, October 16, 2000 3:42 PM Subject: Re: [EE]: Help water level > Given that it is for a sub, the water shouldn't slosh around all that much. Why > not use a float? It is probably a little larger than you want, and perhaps > you'd rather have a non-mechanical sensor, but for ease of assembly and reading > and simple float setup with a pot or rotary encoder can't be beat. > > When you do go to another expiremental method, it would be benificial to have > the float working as well so you can compare the readings and improve your > design, before getting rid of the float. > > -Adam > > Andy Shaw wrote: > > > > Hi Folks, > > I'm trying to put together some sort of sensor to measure the amount of > > water in a model sub ballast tank. The requirements are: > > 1. Must be small (not a lot of space). > > 2. Easy to seal against water. > > 3. Continuous range from say 1 cm to say 30 cm deep, with 1mm accuracy. > > 4. Possibly best not to use anything that depends upon pressure (since this > > may vary depending upon sub depth). > > 5. Easy to hook up to a PIC (either digital or analogue OK - I have both). > > 6. Cheap! > > Not asking much! > > > > I seem to remember seeing a rain gauge project that used two (insulated) > > wires separated by a fixed gap as part pf some sort of oscillator. But guess > > what I've lost the mag. Anyone got the details of know if this would work > > for me? > > > > Thanks > > > > Andy > > > > -- > > http://www.piclist.com hint: The PICList is archived three different > > ways. See http://www.piclist.com/#archives for details. > > -- > http://www.piclist.com hint: The PICList is archived three different > ways. See http://www.piclist.com/#archives for details. > > > > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.