> I keep seein' people here talk about finding leaks by adding dye to the
> freon....talk about 70's technology...or lack thereof. Even small
> independent garages these days use electronic "freon sniffers".
Yes, you're right. Most of them use a small flame and phosgene
detector, or a catalyst plate that changes color when the R-12 comes
in contact with the flame.
But they don't necessarily work so well with R134a. And the simple
fact of the matter is that they're more expensive than a dye charge.
And the fact that the dye charge will help detect leaks indefinitely
as long as it's circulating through the system.
Sometimes low tech is best,
Ron
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