PTC熱敏電阻參數術語
Heating & Temperature Control and PTC Thermistor Parameter Terminology for Overcurrent Protection
Heating & Temperature Control and PTC Thermistor Parameter Terminology for Overcurrent Protection
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, 等。, and common resistance errors are ±15%, ±20%, ±30%, 等. 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. 然而, 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.
As a component that can change the resistance value according to temperature changes, thermistors have a wide range of applications (such as temperature measurement, 溫度控制, temperature compensation, temperature alarm, battery thermal protection). Let me share with you several application cases of thermistors:
The connection method of the NTC thermistor temperature sensor needs to be determined according to the actual application scenario and measurement requirements. During the wiring process, be sure to pay attention to the pin polarity, wire selection, 溫度範圍, filtering and decoupling, grounding treatment, and verification and calibration to ensure the accuracy and reliability of the measurement.
Pt100同Pt1000傳感器之間嘅主要區別在於它們喺0°C嗰時嘅標稱電阻, 其中Pt100嘅電阻為 100 欧姆同Pt1000嘅電阻為 1000 欧姆, 意味住Pt1000具有更高嘅電阻, 使其更適合需要精確溫度測量且受引線電阻影響最小的應用, 尤其是喺2綫電路配置中;
PT100型, 鉑熱電阻器全稱, 是一種由鉑製成的電阻式溫度傳感器 (鉑), 其電阻值隨溫度變化. 這 100 PT之後表示其電阻值為 100 0°C時嘅欧姆, 它的電阻值約為 138.5 100°C時嘅欧姆.
本文探討了 2-, 3-, 以及用于電阻溫度檢測器嘅4綫配置 (RTDs (熱電阻)), 關注環境因素, 精度要求, 成本, 同Wire Configuration影響選擇. 4綫配置好複雜,但可提供最高嘅精度, 而2綫配置喺低精度應用中具有優勢. 選擇配置需要結合應用要求同實際條件.
一個RTD (電阻溫度檢測器) 係一種電阻隨溫度變化而變化嘅傳感器. 電阻隨著傳感器溫度嘅升高而增加. 電阻與溫度嘅關係係眾所周知嘅,並且可以隨時間推移而重複.