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The main difference between an RTD and a Pt100 is the material used for the sensing element: PT100 is a specific type of RTD thermal resistor, and its name comes from “Platinum” (platinum) a “100” (100 ohmoch pri 0°C). It is the most commonly used RTD sensor and is widely used in industrial process control, laboratory measurement and other fields that require high-precision temperature monitoring. The advantages of PT100 include:

The thermal resistance formula is in the form of Rt=Ro(1+A*t+B*t*t);Rt=Ro[1+A*t+B*t*t+C(t-100)*t*t*t], t represents Celsius temperature, Ro is the resistance value at zero degrees Celsius, A, B, C are all specified coefficients, for Pt100, Ro is equal to 100℃.

A PT100 sensor acquires temperature by measuring the change in its electrical resistance, which directly correlates to the temperature it is exposed to; as the temperature increases, the resistance of the platinum element within the sensor also increases, allowing for a precise calculation of the temperature based on this resistance change; v podstate, ten “100” in PT100 signifies that the sensor has a resistance of 100 ohmoch pri 0°C, and this value changes predictably with temperature fluctuations.

Platinum resistors are widely used in the medium temperature range (-200～650℃). V súčasnosti, there are standard temperature measuring thermal resistors made of metal platinum on the market, ako Pt100, Pt500, 1000 Pt, tam.

Rozsah merania teploty bežne používaných platinových odporových snímačov Pt100 je -200～850℃, a rozsahy merania teploty Pt500, Senzorové sondy Pt1000, tam. sa postupne znižujú. 1000 Pt, rozsah merania teploty je -200 až 420 ℃. Podľa medzinárodného štandardu IEC751, teplotné charakteristiky platinového odporu Pt1000 spĺňajú nasledujúce požiadavky: