Sorry, but this is naïve. 2 degrees up or down is not particularly accurate. For example if you read 92ºF it could be 90-94ºF The PE2 is better it is 1.8ºF, the Fluke ir guns are a tad bit better they make a model that is 1ºF up or down... but it is more than a BEL. READ THE SPECS!
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