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A sensor is a transducer that converts a measured quantity of something into a signal carrying information
The signal may be electrical, optical, mechanical, etc… |
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| An ideal sensor allows for continuous measurement without taking timed samples and without modifying the “thing” to be measured (called the measurand) |
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| Detection of the physical or chemical interaction between the environment and the sensing material that allows some material properties to change. |
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| the conversion of the material property to change into a useful signal |
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| Static Characteristics of a sensor refer to the relationship between the measurand and the output signal (i.e., the curve itself) |
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| Sensitivity is the slope of the generated curve |
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| Full Scale Output (FSO) is the maximum output signal |
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| Linearity is the "closeness” of the sensor’s calibration curve to a straight line (typically expressed as a percent of the FSO) |
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| is the lowest detectable value of the measurand |
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| is the smallest increment of the output (as a percent of the FSO) |
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| is the sensor’s ability to reproduce output readings for the same measured quantity and under the same conditions |
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| Is the maximum error of measurements when the sensor is changed for another sensor of the same type. |
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| (or offset) is the output when nothing is applied |
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| is the change in zero output under varying conditions (ex: temperature, storage) |
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| is the change in slope of the calibration curve |
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| is the length of time for the output to reach a certain percent (usually 90%) of the final value |
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| is the ability of the sensor to respond only to its measurand |
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| is the length of time that the sensor stays sensitive under normal operating conditions. |
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| is the maximum difference in the output with an increase and then a decrease in the quantity being measured (expressed as a percent of the FSO) |
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