Bebur water quality family
What are the key parameters affecting water analyzer sensors?
Release time:2025.11.24
It is well known that the quality of a water quality analyzer depends on the accuracy of the sensor, the performance of the instrument and the design.
Sensors play a crucial role in water quality analyzers.
What are the key parameters that affect the sensor?
Drinking water quality analyzer
Professor Li of Bebur Tech thinks as that:
Key parameters of sensors include range, sensitivity, linearity, hysteresis, repeatability, accuracy, resolution, zero drift and bandwidth.
Range: The algebraic difference between the upper and lower limits of the sensor measurement, indicating the range that the sensor can measure. For example, the range of a pressure sensor is -10 N/cm² to 90 N/cm².
Sensitivity: The ratio of the change in the output value of the sensor to the change in the input value, usually expressed by the formula Δy/Δx, where Δy is the change in the output value and Δx is the change in the input value.
Linearity: The degree of linearity between the output and input of the sensor. Ideally, the input-output relationship of the sensor is linear, but in fact there will be a certain nonlinear error.
Hysteresis: The phenomenon that the output curves of the sensor do not overlap when the input changes from small to large and from large to small is called hysteresis. The hysteresis error is expressed by the ratio of half of the maximum output difference between the forward and reverse strokes to its full-scale output value.
Repeatability: The consistency of the measurement results when the same measured quantity is repeatedly measured under the same working conditions. The repeatability error is expressed as the ratio of the maximum difference between the actual output signal values measured multiple times at the same test point to the full-scale output value.
Accuracy: The difference between the sensor measurement value and the true value, also called error by some manufacturers.
Resolution: The minimum change that the sensor can recognize. High resolution is a necessary condition to ensure high accuracy.
Zero drift: The degree to which the output value of the sensor changes over time when there is no input signal.
Bandwidth: The frequency range that the sensor can respond to.
These parameters jointly determine the performance and application range of the sensor. Choosing a suitable sensor requires comprehensive consideration of these parameters based on the needs of the specific application scenario.
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