Liquid level sensors can be used for liquid level measurement of various media in systems and industries such as power, metallurgy, water supply and drainage, pharmaceuticals, and environmental protection. The sensitivity of the liquid level sensor is very important for the measurement of liquid level, so how to choose it? Let me introduce this knowledge to you below.
Within the linear range of the liquid level sensor, the higher the sensitivity of the sensor, the better. Because only when the sensitivity is high, the value of the output signal corresponding to the measurement will be relatively large, which is beneficial to signal processing.
However, it should be noted that the
liquid level sensor
has high sensitivity, and external noise can easily mix in and be amplified by the amplification system, affecting the measurement accuracy. Therefore, the sensor itself is required to have a high signal-to-noise ratio to reduce external interference signals.
The sensitivity of the sensor is directional. When the measured object is a single vector and its directivity is required to be high, a sensor with low sensitivity in other directions should be selected. If the measured object is a multi-dimensional vector, the cross-sensitivity of the sensor must be as small as possible.
If the temperature unevenness of the upper and lower liquids is not considered, the density can be considered to be the same, and it is easy to calculate the weight from the volume. However, in large containers with liquid level sensors, physical quantities such as temperature, density, and viscosity often appear to be uneven throughout the measured medium, and may change with time, temperature, etc., resulting in measurement errors.
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