Resistance thermometers

Know what do you about Resistance?

What is Resistance? Meaning of Resistance?Where can we use Resistance?

We take before Resistance? In physics?

Try to answer this question!

See this video

Resistance thermometers

Resistance thermometers

Just think about this two wards?

What does it mean?

Resistance thermometers

Electrical resistance thermometers- measure

temperature by measuring resistance in a

wire

Resistance thermometers

Definitio

n

Resistance thermometers work on the principle that the

resistance of a metal varies with temperature when

accurate laboratory measurements are required

only standard platinum resistance thermometers

(SPTS) are

Resistance thermometers

used there are two reasons for this:

Resistance thermometers

Platinum

is not only a noble metal but also

the most electrically stable metal known to man

Resistance thermometers

The platinum resistance thermometers PRT are the

reference on which the international definition of

temperature is based.

Resistance thermometers

Advantage of Resistance thermometers

Display is easy to read

Rapid response

Accurate over broad

temperature range

disadvantage

Tends to “drift” years of use

expensive

Summary

Resistance thermometers

Definition:

Resistance thermometers

Electrical resistance thermometers- measure

temperature by measuring resistance in a wire

Resistance thermometers

How it works ?

Resistance thermometers

•Resistance thermometers work on the principle that the

resistance of a metal varies with temperature when accurate

laboratory measurements are required only standard platinum resistance thermometers (SPTS)

Resistance thermometers

•Why we use platinum?

Resistance thermometers

.1noble metal

Resistance thermometers

most electrically stable metal

Resistance thermometers

Advantage of Resistance thermometers

Display is easy to read

Rapid response

Accurate over broad

temperature range

disadvantage

Tends to “drift” years of use

expensive

I hope you under stand the lesson?

Resistance thermometers

Miss: shaimaa 3arfa

Physics

Done: marim abdel karim gado

Resistance thermometers