In this article, we will be taking a look at the PT100 Temperature Sensor Table. So using this table, we can see how the resistance of PT100 changes with temperature.
But before we do that, we first need to know what a PT100 temperature sensor is and how it works. Right? Because having a clear idea about what this sensor is will help us know how to use it. Does that make sense? Great! Then let us start from there!
What Is PT100 Temperature Sensor?
PT100 temperature sensor is a sensor that that is made from Platinum. But what does it do? Well, we can use PT100 sensor to measure the temperature around it. So in a way, it can act like a thermometer!
Wait a second. How does a sensor made of Platinum work as a thermometer?
How does it work?
So here is the thing. A pure metal like platinum has a unique feature in that it’s resistance increases with an increase in temperature. So by just measuring the resistance across it, we can map it to it’s corresponding temperature!
Now that sounds great right? Because now just my checking the resistance of this sensor, we can tell what the temperature is. How cool is that!
But why does the Platinum behave this way? What makes it change its resistance based on the temperature?
Well, to answer this question, we need to know a little bit of the chemical structure of Platinum.
First thing first, we need to know that Platinum is a pure metal. Because of this, an electric current can flow easily through it. Alright?
So everything should work fine when you are passing current through it then, right? Well, not really!
Why? Because this free flow of electrons in Platinum is affected by the temperature around it.
You see, a metal like Platinum is made up of crystals. And these crystals starts vibrating as the temperature increases. So this increase in vibration in turn will slow down the flow of electrons!
So there you have it! This is the reason why Platinum will conduct less current as temperature increases.
So PT100 temperature sensor that is built using Platinum will take advantage of this feature. And hence, we can use it to measure resistance across it to determine the temperature!
Now that is a very nifty way to take advantage of this feature right? I mean you are measuring temperature around you by just checking resistance of a sensor. How cool is that!
So now that we know how a PT100 temperature sensor works, it is time for us to look at the PT100 Temperature Sensor Table.
What Is A PT100 Temperature Sensor Table
So as we learnt, PT100 temperature sensor’s resistance increases with increase in temperature. Right? So just by measuring the resistance across it, we can tell what the temperature around it is. Right?
But what is the formula we need to use to convert a resistance to temperature? That is when the temperature sensor table comes in handy!
So simply put, this PT100 temperature sensor table will help us map between a resistance value and it’s respective temperature. No formula required then! That is great right.
So how does this PT100 temperature sensor table look like then? Well, take a look at it for yourself:
| Temperature (In Degree Celsius) | Resistance (In Ohms) |
| -200 | 18.52 |
| -100 | 60.26 |
| 0 | 100 |
| 100 | 138.5 |
| 200 | 175.85 |
| 300 | 212.05 |
| 400 | 247.10 |
| 500 | 281 |
| 600 | 313.72 |
| 700 | 345.29 |
| 800 | 375.71 |
| 850 | 390.49 |
So as you can see, there is a simple mapping between the temperature and resistance. You can then use this table as a reference to measure the current temperature across a PT100 sensor.
But before we go, did you notice one important thing in the PT100 Temperature Sensor Table? Can you spot it?
So if you did find that the resistance is at 100 Ohms when the temperature is at zero degree Celsius, then yes! You got hat right!
Now that is an important feature of the Pt100 temperature sensor. So its resistance is always at 100 Ohms when it is working at a temperature of 0 degree centigrade. It is a good thing to keep that in mind when working with this sensor!
Conclusion
So there you have it. Because that is all there is for you to know about PT100 sensor.
But if you still have any questions about it, do let me know in the comment section below and I will be happy to help!
So with that, I will end this article now. Have a great day you all! 🙂
