What is platinum resistance?
componentCommon Pt100 temperature sensing components include ceramic components, glass components, and mica components. They are made of platinum wire wound on ceramic support, glass support, and mica support respectively, and then processed by complex processes.
Thin film platinum resistanceThin-film platinum resistance: using vacuum deposition thin-film technology to sputter platinum on the ceramic substrate, the film thickness is within 2 microns. The Ni (or Pd) lead is fixed with glass sintering material, and the thin film element is made by laser trimming.
Characteristics of platinum resistance(1) -200℃<t<0℃, RPt100=100[1+At+B +Ct(t-100)] (2-1)
(2) When 0℃≤t≤850℃, RPt100=100(1+At+B) (2-2)
In the formula, A=3.90802×; B=-5.80×; C=-4.2735×.
The main technical parameters of Pt100 temperature sensor are as follows:
Measuring range: -200℃～+850℃; allowable deviation △℃:
Class A ±(0.15+0.002│t│). Class B±(0.30+0.005│t│);
Thermal response time "30s;
The minimum insertion depth of the resistance: the minimum insertion depth of the thermal resistance is ≥200mm;
Let-through current ≤ 5mA. In addition, the Pt100 temperature sensor also has the advantages of anti-vibration, good stability, high accuracy, and high pressure resistance.
PT100 design principleThe 100 after PT means that its resistance value is 100Ω at 0°C, and its resistance value is about 138.5Ω at 100°C.
The working principle of PT100: When PT100 is at 0 ℃, its resistance value is 100Ω, and its resistance value will increase at a uniform rate as the temperature rises.
The resistance value will increase regularly with the uniform temperature.