Temperature Sensor Basics

Temperature sensors are widely used. The following are some basic knowledge and common terms of temperature sensors. 1. Output impedance: The impedance measured at the sensor output when the input is short-circuited. 2. Zero output: Under city conditions, the output of the sensor when the added measured value is zero. 3. Hysteresis: Within the specified range, when the measured value increases and decreases, the maximum difference that appears in the output. 4. Late: The time delay of the output signal change relative to the input signal change. 5. Drift: During a certain time interval, the sensor output is finally measured irrelevant and unwanted variation. 6. Zero drift: the change in zero output at a specified time interval and indoor conditions. 7. Sensitivity: the ratio of the increment of the sensor output to the corresponding increment of the input. 8. Sensitivity drift: The change in the slope of the calibration curve due to the change in sensitivity. 9. Thermal Sensitivity Drift: Sensitivity drift due to changes in sensitivity. 10. Thermal Zero Drift: Zero drift due to changes in ambient temperature. 11. Linearity: The degree to which the calibration curve conforms to a specification only. 12. Philippine linearity: The degree to which the calibration curve deviates from a specified straight line. 13. Long-term stability: the ability of the sensor to remain within the allowable error for a specified time. 14. Inherent rate: when there is no resistance, the sensor's free (without external force) oscillation rate. 15. Response: The characteristic of the measured change at the output. 16. Compensated temperature range: The temperature range that is compensated for the sensor to maintain zero balance within the span and specified limits. 17. Creep: The change in output within a specified time when the measured machine has a constant environmental condition. 18. Insulation resistance: Unless otherwise specified, it refers to the resistance value measured between the specified insulating parts of the sensor when the specified DC voltage is applied at room temperature. 19. Sensor: A device or device that can sense the specified measured value and convert it into a usable output signal according to a certain law. Usually consists of sensitive components and conversion components. ①Sensitive element refers to the part of the sensor that can be measured directly (or in response). ② The conversion element refers to the part of the electrical signal that can be sensed (or responded) by a more sensitive element in the sensor and converted into an electrical signal that is transmitted and (or) measured. ③ When the output is a specified standard signal, it is called a transmitter. 20. Measuring range: the range of the measured value within the allowable error limit. 21. Range: The algebraic difference between the upper and lower limit of the measurement range. 22. Accuracy: The degree to which the measured result agrees with the true value. 23. Repeatability: The degree of agreement between the results of multiple consecutive measurements of the same quantity under all the following conditions: Same method of measurement: Same observer: Same measuring instrument: Same location: Same conditions of use: repetition in a short period of time. 24. Resolution: The minimum change that the sensor can detect within the specified measurement range. 25. Threshold: The minimum change in a measurand that produces a measurable change at the sensor output. 26. Zero position: the state where the absolute value of the output is minimized, such as a balanced state. 27. Excitation: The external energy (voltage or current) applied to make the sensor work properly. 28. Maximum excitation: The maximum value of excitation voltage or current that can be applied to the sensor under urban conditions. 29. Input impedance: The impedance measured at the input terminal of the sensor when the output terminal is short-circuited. 30. Output: The amount of electricity produced by the sensor as a function of the applied measured value.
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