What does the 550 do that a regular set of gauges and a thermometer will not?

So you are looking at the 550 and wondering "What the heck do I need that for, I can get the same results with a analog set of gauges and a thermometer...."
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Testo 550 Common questions and answers

We get a lot of questions on the Testo 550. We have outlined the most common below. Have one that is not answered? drop us a note and we will add it.
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