Stationary with some vibration -- it's for a hydraulic tank and oil=20 weight is 90. The oil does NOT disperse into the system and return when=20 stopped. I've just been asked by someone if I can make them a simple=20 level sensor as commercial sensors are $800+, and thought this to be an=20 interesting problem. Cheers, -Neil. On 2/17/2015 12:59 PM, Denny Esterline wrote: > What environment? Temperature, moving vs stationary, is the oil dispersed > though the system during operation and returns to the tank when shutdown > (car engine behavior)? > > There was a recent discussion of sensing water level, I think most of tho= se > answers are applicable here. > > > Tripped on some sales literature for these a couple days ago - > http://www.mtssensors.com/ Interesting ideas, but I have no clue about > pricing. > > > -Denny > > > On Tue, Feb 17, 2015 at 10:39 AM, Neil wrote: > >> I looking into making an oil-level sensor as a general indicator of oil >> level. It does not need to be super accurate, and really just needs to >> indicate a minimum of 5 levels -- too low, low-side of normal, average >> normal, high normal, or too full. Space for the sensor is tight -- >> approx 1" dia and about 6" to 8" deep. I've found this page, which >> shows some general ways this is done... >> >> http://www.machinerylubrication.com/Read/23921/oil-level-sensors-automot= ive-industrial >> >> What I'm thinking is a small donut-shaped float around a 6" tube, with >> magnets in the donut and reed or hall-effect sensors in the tube. Or >> vice versa -- a tube with the sensors in the tube wall, and a magnetic >> ball floating in the center. Any better (simpler) ideas? Or anyone >> know if I can do this with some type of capacitive sensing? >> >> Cheers, >> -Neil. >> >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .