Hey Blast, Same here... it's a bit pricey for me to justify (but who knows). But more importantly, it would be valuable to know the field expedient measurements to use simply because I can think of a lot of situations where you wouldn't have this, but maybe you have a pencil or two, some wire, and a 9 volt from a toy in a car, etc.

I wish I still had access to a lab... wouldn't take too long to figure out the amount of salt and time @ voltage to react what you need. Hopefully someone here has the equipment to calculate it (I haven't been in a chem lab in 10 years! - I'd have to brush the dust off of the corner of my brain that understood this at one point) <img src="/images/graemlins/smile.gif" alt="" />