What is an NTC thermistor and why should it matter?
Imagine having a small sensor that adapts to temperature changes such as a chameleon at a costume party. That is, in essence, what does an NTC thermistor (negative temperature coefficient). Its resistance decreases when the temperature rises, which makes it a rather intelligent heat detector. They normally operate in a range of −55 to +200 ° C, so the winter days do not scare them.
Characteristics that make it unique
Unlike their cousins, the RTDs that are more ‘metallurgical’, NTC thermistors are the versatile boys of the neighborhood, generally manufactured in ceramics or polymers. This gives them certain advantages, as an response to temperature changes that is all the faster and more precise. Like a marathon runner, but in the world of sensors!
Precision in extreme temperatures
Most of these brave devices are ideal between −55 and +200 ° C. However, do not underestimate special thermistors who can work near the absolute cold or those who venture at temperatures above 150 ° C. Each one has their battlefield!
NTC thermistors vs. Other temperature heroes
Compared to thermocounts, NTC thermistors opt as the lightest and most agile, offering greater stability and sensitivity in low temperature ranges. In addition, they require less additional circuits to function. Isn’t it great that such a small device can do so much without asking much in return?
Diversity in manufacturing: three types of NTC thermistors
In the world of thermistors, there are three categories that you must know, and each one has its own style.
1. Pearl thermistors
These little thermistors, which seem pearls, use platinum alloys in their construction. The sintering technique gives them remarkable sensitivity.
2. Dis and chip thermistors
With metallic contacts on the surface, these thermistors come in a larger size and handle high powers without breaking sweat.
3. Glass encapsulated thermistors
These are those that have a resistant look and are ready to face burning temperatures of more than 150 ° C, ideal for demanding environments.
Application versatility: beyond what you imagine
NTC thermistors are like Swiss knives in the world of technology. They are used to measure, control, compensate temperature and more. You can find them detecting if there is liquid, limiting electric currents or even monitoring temperatures in vehicles. They are the perfect partner for any gadget!
A small device, a great impact
Although children usually go unnoticed, NTC thermistors show that you do not need to be great to make a difference. With its precision, adaptability and efficiency, they are the dicaprio of the temperature measurement: a lot of talent in a small packaging. So the next time you feel cold, remember that there are heroes like them that help control each degree.