<font color='#000F22'>check this out
Analyser bits you just need to add your own snesor. Very easy to build and with the current exchange rate very reasonable, especially if you can find a YBOB diver to part with old cells. In particular
cheap bits it's basic but will do the job. There was a site that did all the electronics for $49, but have lost the link. If you do a search here on the forum you should find it.
gareth