What is RTD? How to measure Temperature using RTD?
RTD is a Sensor.
Used to Measure Temperature
It's Measuring Range -200 to 850 Deg. C. it is non-linear.
Full form of RTD is Resistance Temperature Detector.
Whenever Temperature Changes Resistance also changes.
If Temperature Increases, Resistance also Increase, If Temperature Decreases, Resistance also Decrease.
RTD is a Passive Component.
Require External Electrical Circuit To Measure Resistance of RTD, Like Resistor Bridge
Construction of RTD
Made using Platinum, Nickel, Copper or Tungsten material
PT100 is Type of RTD
PT Represent Platinum
At Zero Deg. Cel Temperature its resistance is Resistance is 100 Ohm
That's why it is called PT100.
At 100 Deg. Cel Resistance is 138.51 Ohm
Formula to Calculate Temperature with RTD
RT=R0(1+αT)
RT is Resistance of RTD
R0 is Resistance at Zero Deg. Cel, which is 100 Ohm
α is Coefficient for Platinum, Its value is 0.00385/ ֯C
T is Temperature
T=(RT/R0)-1/α)
Suppose RT value is 113 Ohm
R0 is 100
α is Coefficient for Platinum, Its value is 0.00385
T = (113/100)-1/0.00385
T = 33.7 Deg. Cel
Images and vector credit to Pixabay
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