I am involved in a project to develop a new form of oxygen analyser for
reflow ovens that will have the following characteristics
        Instantaneous response
        High accuracy and repeatability
        Parts per billion sensitivity
        Long Life
        Portability

I'd like to add low cost to that as well, but we'll have to wait and see!

The system we have been using has a heated chamber with the sensor inside
it. Since the sensor has to be at 720 deg C to function correctly, the
temperature of the chamber means that any hydrocarbons in the gas stream
just start to burn, and so the oxygen then burns, and we get a falsely low
result (usually 3-4 parts per billion!)

Anyway, we need to understand more thoroughly what is in the volatalised
flux fumes that are floating around in a reflow oven.

Can anyone help us with this?

Nicholas Kane
Axion Australasia



Axion Australasia
[tel: +613 9888 4311    fax: +613 9888 4241]

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