Question { ICI Pakistan, 14113 }

What is the difference between pt100, pt500 and pt1000 RTDs?

Answer

This number 100,500,1000 refers to the reference resistance of the Rtd.meaning pt 100 means at 0 degree temp it gives 100 ohm resistance ,similarly pt 500 gives, 500 ohm resistance at 0 degree.but not questions arrise why we go for higher resistance and the ans is simple for good sensitivity and accuracy.