Thermal resistors

The measurement of the temperature of RTD is based on the properties of the electrical conductors to alter its resist...

The measurement of the temperature of RTD is based on the properties of the electrical conductors to alter its resistance depending on the temperature . Most wire increases its resistance with increasing temperature and decrease with decreasing temperature .
RTD types :
Pt 100 by a factor of 1.385 (range -200 ÷ 850 ° C ) - IEC 751
Pt 100 by a factor of 1.391 (range -200 ÷ 650 ° C) - 22 graduations
Pt 46 (range -200 ÷ 650 ° C) - 21 graduations
Cu 53 (range -50 ÷ 180 ° C) - graduation 23
Cu 100 (range -50 ÷ 180 ° C) - graduation 24
Ni 100 (range -60 ÷ 250 ° C ) - DIN 43760 ,
Cu 50 (range -50 ÷ 200 ° C)
Pt 50 (range -260 ÷ 750 ° C)