What Are Resistance Temperature Detectors (rtds) - Make An Rtd Temperature Sensor


We probably have heard a lot regarding temperature sensors like thermocpuples etc. however a very common tendency involved with all metals can be simply adopted for making high temperature detectors.


In schools we all might have studied about the physical properties of metals and regarding how metals change their physical properties in response to heat.

Basically metals have the tendency to increase their resistivity when subjected to heat. The change in their resistance value is directly proportional to the applied heat.

The principle can be thus well exploited for measuring temperatures through their varying resistances and by measuring the corresponding readings

over an Ohmmeter.

Learning How to Make an RTD Temperature Sensor.

The proposed idea is based on this principle and can be used for measuring temperatures above 200 degree Celsius.

However the metal incorporated should have sufficient


resistance at room temperature or rather at least 100 Ohms value at zero degree Celsius.

Conventionally platinum metal is employed for the purpose due to their inert nature, in our design we use Nichrome for the experiment.

The reading device or the meter can be any commercial Ohm meter or a digital multimeter set at the resistance range.

The resistance selected can be set around the 500 Ohm mark and tried for other ranges while proceeding with the experiment.

 Intersted also to know more about RTDs and their functioning....Learm More.



Article Written By Swagatam

Swagatam is a blogger at Expertscolumn.com

Last updated on 25-07-2016 194 0

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