At 05:44 PM 8/13/02 -0300, you wrote:
>What temperature range do you have to cover

And what is the liquid? Human blood? 120'C fuming Nitric acid? Sewage?
Food? A microbial cell culture? The water in a hot tub? (same thing?)

Any kind of sheath is going to slow down the response, and you have to
make sure that any materials that are in contact with the liquid are
compatible with it. Industrially, the most common probe material is
probably 300-series stainless steel tubing, TIG welded, which meets
NSF standards for food contact as well as being resistant to a lot of
common chemicals under normal conditions.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
9/11 United we Stand

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