I got some pretty good readings that look like I'll have a resolution of around 0.005 SG (which is usable, I think). The only major problem I ran into was that air was slowly leaking out the tubes that were in the water, which means the seal I have between the tubes and the pressure sensor ports isn't good enough. So the next thing on my list is to come up with a way to seal the tubes better.
Here are some pictures of the prototype:
2 comments:
hey ken, i found your blog while i googled. i am wanting to make some little level transmitters for friends and family, for use on farm with animal water feeders. I am having trouble connecting wires to the freescale surface mount sensor. I like the way you did it. Where do I find those little boards?
Thanks for reading; good luck with your level sensors. I got that particular protoboard from Radioshack (although there are plenty of other places you can get similar stuff from. I cut one of the boards in half since I only needed to solder the pins on one side of the sensor. Here's a link to it: http://www.radioshack.com/product/index.jsp?productId=2103799
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