Archív značiek: termistorový snímač teploty

NTC (negatívny teplotný koeficient) Teplotný senzor je prvok merania teploty, ktorý využíva exponenciálne zníženie odporu termistora, keď teplota stúpa. Jeho jadrom je keramický polovodič vyrobený spekaním oxidov kovov (napríklad mangán, kobalt, a nikel), a teplota je odvodená meraním zmeny odporu. Nasledujú jeho základné technické vlastnosti, žiadosti, a výberové body:

V modernej elektronike sa dnes používajú štyri hlavné teplotné senzory: Negatívny teplotný koeficient (NTC) termistory, detektory teploty odporu (Rts), termočiny, a polovodičové integrované (IC) senzory.

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, atď., and common resistance errors are ±15%, ±20%, ±30%, tam. 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. Však, 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.