I forgot one link:
http://www.metrisinst.com/product_details.php?ID=3D42&sm_chart=3D0&ref=3Dte=
mp
This module could be defined as a toy and who wrote the datasheet is
not a profesionist.
How could be understand the following phrase:

Accuracy: +/- 2% or 2=B0C, whichever is greater

:) ?




On 4/5/07, Vasile Surducan <piclist9@gmail.com> wrote:
> On 4/5/07, John Chung <kravnus@yahoo.com> wrote:
> > Can anyone recommend some IR modules? It should not
> > cost too much. USD 30.00 at max. Range of measurement
> > would be 10C to 300C.
>
> " and must measure at a critical distance range of 1 inch"
>
> You didn't define which is the target surface, because if it's a 1x1mm
> iron piece,
> most of the commercial infrared modules will not be able to sense it
> even from 1 inch distance.
>
> Let's think and talk  like engineers and not like accountants...
> I'll try to explain you why is improbable to find such device at $30.
>
> 1. Because the measurement range is below and above the possible
> ambiant temperature, so definitely it needs an internal temperature
> reference (like a peltier) somewhere below the 10C, and this a
> critical moisturing point (around 8C).
> 2. Because at 1 inch distance and 300C, everything will be melted
> including the software you're writting
>
> and so on...
> :)
>

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