Sensitivity and resolution of liquid level sensor

The sensitivity of the liquid level sensor refers to the ratio of the output change △y of the liquid level sensor to the input change △x under the steady-state operation. It is the slope of the output-input characteristic curve. If there is a linear relationship between the output and input of the liquid level sensor, the sensitivity S is a constant. Otherwise, it will change with the input quantity. The dimension of sensitivity is the ratio of the dimension of output and input. For example, for a displacement level sensor, when the displacement changes by 1mm, the output voltage changes by 200mV, and its sensitivity should be expressed as 200mV/mm. When the dimensions of the output and input of the liquid level sensor are the same, the sensitivity can be understood as the magnification. Improve the sensitivity and obtain higher measurement accuracy. But the higher the sensitivity, the narrower the measurement range and the worse the stability.

The resolution of the liquid level sensor refers to the ability of the liquid level sensor to feel the smallest change in the measured value. That is, if the input quantity changes slowly from a certain non-zero value. When the input change value does not exceed a certain value, the output of the liquid level sensor will not change, that is, the change of the input value of the liquid level sensor cannot be distinguished. Only when the input change exceeds the resolution, the output will change. Generally, the resolution of each point in the full-scale range of the liquid level sensor is not the same, so the largest change in the input that can cause a step change in the output in the full-scale range is commonly used as an index to measure the resolution.