A customer asked me, orifice flowmeter need to add a temperature compensation temperature point, in the end is good with pt100 or pt1000, then here I briefly introduce the difference between the two for your reference.
Pt100 and pt1000 are both made of platinum (Pt) of the resistance temperature detector, a positive resistance coefficient.
Pt100 its resistance will change with the temperature changes. PT 100 behind that it is at 0 ℃ for the resistance of 100 ohms at 100 ℃ when its resistance is about 138.5 ohms.
Pt1000 than pt100 sub-degree number 10 times larger, higher accuracy, and its resistance will change with the temperature changes. PT 1000 behind that it is at 0 ℃ when the resistance of 1000 ohms at 300 ℃ when its resistance is about 2120.515 ohms.
PT1000 input impedance to be higher, the excitation voltage can be increased, so to improve the sensitivity, if the wire is very long, then the accuracy is good, there is no accumulation of resistance error, PT100 will have to add root compensation wire.