What is a linear NTC temperature sensor?
Release Date:
2023-02-22
Author:
What is a linear NTC temperature sensor?
A linear temperature sensor is a linear-output negative temperature coefficient (NTC) thermal controller and a linear temperature–output voltage transducer. Specifically, under a standard operating current of 100 µA, the device’s output voltage varies linearly with temperature, thereby achieving a linear conversion from a non‑electrical quantity to an electrical one.
What are the key characteristics of a linear NTC temperature sensor?
Within its operating temperature range, the temperature sensor exhibits a nearly linear relationship between temperature and output voltage. This enables straightforward design of temperature‑sensing or temperature‑control circuits without requiring additional linearization, thereby simplifying both the hardware design and system tuning.
How is the temperature range of a linear NTC temperature sensor defined?
In general, the temperature range can span from –200°C to 200°C; however, given practical requirements, such a broad range is seldom necessary. Consequently, three distinct sections must be tailored to different product packaging designs, and the selection of lead wires varies accordingly. For linear thermistor components, the operating temperature range is limited to only –40°C to 80°C, which is sufficient to meet typical circuit‑level temperature compensation needs.
What criteria should be followed when selecting extension lines?
Typical double-sided coated paper production lines should be operated within the temperature ranges of –20°C to 20°C and –50°C to 100°C, while high-temperature production lines should be operated within the range of 100°C to 200°C.
What does “base pressure” mean?
The reference operating voltage is the thermal stress at 0°C (the compound of ice and water), and the controller’s operating voltage value is derived from the current during operation (100 A), which in fact equals zero. This value is denoted as V(0). Calibration is performed upon leaving the factory; since the temperature coefficient S remains constant, once the reference operating voltage V(0) is known, the controller’s operating voltage at any temperature can be determined without the need for further grading of the controller. The formula is as follows:
V(T)=V(0)ST.
For example: Suppose the reference operating voltage V(0) is 700 mV, and the temperature coefficient S is −2 mV/°C. Then, at 50°C, the output operating voltage V(50) would be 700 − 2 × 50 = 600 mV. This illustrates the practical value of a linear temperature sensor compared to other types of temperature sensors.
Huizhou Jin Yuan Xiang Electronic Co., Ltd. It is a high-tech enterprise that manufactures NTC thermistor NTC temperature sensor Temperature probes. Feel free to request a quote with product images. Free sample production available. For more information on NTC thermistors, please visit our website at www.jyx-sensor.cn. If you have any questions, please contact our team for assistance.
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