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General Catalog 610-01
TEMPERATURE SENSORS Pt 100 Ω
TEMPERATURE SENSORS Pt 100 Ω
General information
TEMPERATURE SENSORS Pt 100 Ω

The measurement is based on variation of resistance from metallic wires (resistors) against variations of temperature. Materials most often used are platinum and nickel. Platinum offers a large temperature range and a good linearity. His pureness and chemical inertia guarantee a high stability of sensor itself. 

Relation between platinum resistance and temperature according Standard CEI 751 is as following formula (restricted):

                                                           Rt = Ro [ 1 + At + Bt2 + Ct3 (t - 100)] 

 

Rt = Thermometer resistance at temperature t
Ro = Thermometer resistance at 0°C
t = Temperature in °C
A B C = Coefficients according to previous calibration ( C = 0 for positive temperature in °C)

Industrial probes and boards are base on:

Ro = 100 Ω
R 100°C = 138.5 Ω

STANDARDS AND TOLERANCES

FRANCE NFC 42330
GERMANY DIN 43760
GREAT BRITAIN BS 1904
INTERNATIONAL CEI 751


Acceptance ttolerances in °C:

Class A: ± (0.15 +0.002)
Class B: ± (0.3  +0.005)
is temperature value in °C

General Catalog 610-01
17/04/2018 11:39
General information
TEMPERATURE SENSORS Pt 100 Ω
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