Tag Archives: senzor temperature termistora

NTC (negativni temperaturni koeficijent) temperaturni senzor je element za mjerenje temperature koji koristi eksponencijalno smanjenje otpora termistora kako temperatura raste. Njegova jezgra je keramički poluvodič napravljen sinteriranjem metalnih oksida (kao što je mangan, kobalt, i nikla), a temperatura se zaključuje mjerenjem promjene otpora. Sljedeće su njegove osnovne tehničke karakteristike, aplikacije, i izborne tačke:

Postoje četiri glavna temperaturna senzora koja se danas koriste u modernoj elektronici: Negativni temperaturni koeficijent (NTC) termistori, otporni temperaturni detektori (RTDs), termoelementi, i integrirani na bazi poluvodiča (IC) senzori.

When selecting a thermistor, it is indeed necessary to comprehensively consider many key parameters and packaging (epoxy resin Encapsulation, Glass Bead Encapsulation, thin film Encapsulation, SMD Encapsulation, stainless steel probe sensor Encapsulation, injection molding coating). Let me tell you in detail:

‌ The resistance range of thermistors is wide, and the resistance of NTC thermistors can range from tens of ohms to ten thousand ohms, and even special devices can be customized according to needs. Commonly used resistance values ​​are 2.5Ω, 5Oh, 10Oh, itd., and common resistance errors are ±15%, ±20%, ±30%, itd. The resistance range of PTC thermistors is usually from 1KΩ to hundreds of KΩ.

‌Reasonable arrangement of temperature sensors‌: The location and arrangement of temperature sensors will also affect the response time. If the contact area between the sensor and the object being measured is large, the heat exchange will be faster and the response time will naturally be shorter. Međutim, please note that too large a contact area may also lead to increased measurement errors, so we have to make a trade-off based on the actual situation.