Hi Vasile:

The referenced module is specified for the range of -27 to 482=B0F (-33 to =

220=B0C).  So Accuracy =B12% of reading or =B12=B0C means that for temperat=
ures of 100c =

and lower the accuracy is +/- 2%, above 100C it's capped at +/-2 deg C.

Hi John:

All the IR modules I've seen have rather wide view angle so when looking at=
 a =

soldering iron tip would see mostly the background.

ZYTemp http://www.zytemp.com/ makes many more IR thermometers than are show=
n on =

the Metris web page.  I have the TN105 and it measures -11 F when looking u=
p at =

a blue sky and + 43 F when looking up a clouds.

There are IR thermometers made by Barnes engineering Co. and I suspect othe=
rs =

that have a microscopic spot size.  I used one of these at a former job.  Y=
ou =

can measure the temperature by looking through a microscope and putting the =

cross hairs on the part of the IC where you want the measurement.  Either t=
he =

chip needs to be coated with a black substance that has an emissivitey of 1=
 or =

you need to do a calibration to know the actual temperature.  The problem i=
s =

that the prices are many orders of magnitude higher than you want to pay.  =
The =

optics to work with the heat type IR are expensive.

Have Fun,

Brooke Clarke


-- =

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