Tagu arhīvs: Termistoru tehnoloģija

NTC (negatīva temperatūras koeficients) Temperatūras sensors ir temperatūras mērīšanas elements, kas izmanto eksponenciālu termistora izturības samazināšanos, paaugstinoties temperatūrai. Tās kodols ir keramikas pusvadītājs (piemēram, mangāns, kobalts, un niķelis), un temperatūru secina, izmērot pretestības izmaiņas. Šīs ir tās galvenās tehniskās īpašības, pieteikumi, un atlases punkti:

Mūsdienu elektronikā šodien tiek izmantoti četri galvenie temperatūras sensori: Negatīva temperatūras koeficients (NTC) termistori, pretestības temperatūras detektori (RTS), termopāri, un pusvadītāju bāzes integrēts (IC) sensori.

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, 5Ω, 10Ω, utc, and common resistance errors are ±15%, ±20%, ±30%, utt.. 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. Lai arī, 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.