Rtd Sensor Temperature Range

Different combinations of metals can be used in building the thermocouples to provide different calibrations with different temperature ranges and sensor characteristics.

Rtd sensor temperature range.

The din standard specifies a base resistance of 100 ohms at 0 c and a temperature coefficient of 00385 ohm ohm c. The rtd pt100 and pt1000 are available in a similar range of tolerances and both can have similar temperature coefficients depending on the purity of the platinum used in the sensor. For platinum is used the range is up to 660 0 c. For example a class a sensor equipped with a coiled rtd element must maintain the specified tolerance from 100 450 c.

By selecting the proper elements and protective sheathing rtds can operate in a temperature range of 200 to 650 c 328 to 1202 f. The relative change in resistance temperature coefficient. Thermocouples are temperature sensors that use two different metals in the sensor to produce a voltage that can be read to determine the local temperature. Each type of temperature sensor has a particular set of conditions for which it is best suited.

A wide temperature range approximately 200 to 850 c good accuracy better than thermocouples good interchangeability long term stability. The linear approximation of the resistance temperature relationship of the metals between 0 0 c. From the temperature of 0 0 c up to a temperature value where the change is linear is considered as the temperature range of the sensor. Nickel is suitable for temperatures below 300 0 c.

The curve describes the resistance vs temperature characteristics of a platinum 100 ohm sensor the standardized tolerances and the measurable temperature range. Home products temperature sensors resistance temperature detectors rtd resistance temperature detectors rtd understanding an application s performance requirements such as operating temperatures accuracy and repeatability demands material compatibility issues and environmental conditions are crucial to designing the best rtd temperature sensor solution. Order before 8pm est standard shipping mon fri. Common rtd sensing elements constructed of platinum copper or nickel have a repeatable resistance versus temperature relationship r vs t and operating temperature range the r vs t relationship is defined as the amount of resistance change of the sensor per degree of temperature change.

When comparing the pt100 vs pt1000 in terms of resistance keep in mind that resistance value readings for the pt1000 will be higher by a factor of ten than. Note that iec 60751 specifies a maximum temperature range for each class. Resistance temperature relationship of metals. When operated outside this temperature range the sensor accuracy might default to class b.

Rtds offer several advantages. Why use an rtd instead of a thermocouple or thermistor sensor.