temp sensor

[janni]

There's a wide range of IR thermometers (some of them even use, discussed in this topic, thermocouples ) so picking a proper one requires some consideration. On the other hand, every year now the IR thermometers (mainly those based on semiconductor sensors) get better, cheaper and more popular.
Unfortunately, the accuracy is not great and measurements depend on emissivity of measured object's surface. For accuracy better than 1% or emissivity independence one has still to pay thousands, rather than hundreds of USD.

[joseLB]

There's a wide range of IR thermometers (some of them even use, discussed in this topic, thermocouples ) so picking a proper one requires some consideration. On the other hand, every year now the IR thermometers (mainly those based on semiconductor sensors) get better, cheaper and more popular.
Unfortunately, the accuracy is not great and measurements depend on emissivity of measured object's surface. For accuracy better than 1% or emissivity independence one has still to pay thousands, rather than hundreds of USD.

Janni
At the add, they tell it´s 1 degree accuracy...
What the ideia behind them? ...mainly those based on semiconductor sensors...
Could you drop a link here?
Jose

[janni]

At the add, they tell it´s 1 degree accuracy...

They say:
Accuracy: ± 1,5% or ± 1,5 ℃
(whichever is greater, i.e. at 200℃ error may reach ± 3 ℃). And that's assuming measured body emissivity of 0.95.

It's the reproducibility (difference between subsequent measurements, whatever their absolute accuracy) that's estimated as 1% or 1 ℃ (again, whichever is greater).

Could you drop a link here?

See here, for example.

[janni]

Sorry, somehow managed to duplicate the post .

[LGR]

What the ideia behind them?

http://en.wikipedia.org/wiki/Black-body_radiation

It's pretty complicated quantum physics.