Tag Archives: termistori temperatuuriandur

NTC (negatiivne temperatuuri koefitsient) temperatuuriandur on temperatuuri mõõtmise element, mis kasutab termistori takistuse eksponentsiaalset vähenemist temperatuuri tõustes. Selle südamik on keraamiline pooljuht, mis on valmistatud metallioksiidide paagutamisel (nagu mangaan, koobalt, ja nikkel), ja temperatuuri järeldatakse takistuse muutuse mõõtmise teel. Järgmised on selle peamised tehnilised omadused, rakendusi, ja valikupunktid:

Tänapäeva elektroonikas kasutatakse nelja peamist temperatuuriandurit: Negatiivne temperatuuri koefitsient (NTC) termistorid, takistuse temperatuuriandurid (TTA-d), termopaarid, ja pooljuhtide baasil integreeritud (IC) andurid.

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, jne., and common resistance errors are ±15%, ±20%, ±30%, jne. 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. Siiski, 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.