Hello, All. Sorry to bring this up again but I'm still trying to find the perfect solution to test my hot sauces to make sure they're shelf stable (preferably around pH 4.0). I just talked to a genetleman at a scientific supply company, who told me I needed to buy a digital pH meter (cost: $85.00, plus shipping). The salesman explained that the meter was quite precise (in .1 increments which is good), and that pH test paper (even paper for home brewing) would give me color readouts. Since my sauces come in green, red, orange, and yellow, he thought the color of the sauces would interfere with the color readout on the pH test paper (which only comes, he said, in .3 increments). Does all of this make sense? And is there any other option?? I'd hate to spend 90 bucks only to find out there was a better, cheaper way. Help!! TIA, Robert. P.S. Jim, Judith, and others who sell to the public, I'd especially be interested in your take on this.