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