电容感应技术是*可靠的液位监测方法。这是因为液体本身具有导电性，从而引起电容传感器的电容发生变化。电容传感器分为两种：自电容和互电容。自电容使用单个引脚作为传感器，测量该引脚和地面之间的电容。这一电容被称为寄生电容。液体对传感器寄生电容的改变程度取决于液体体积。互电容使用一对引脚。其中一个作为发送器(TX)，另一个作为接收器(RX)。这种方法测量的是两者之间的电容，即互电容。液体会引起互电容的变化，而变化程度取决于液位。
PV023R1K1T1NHCC
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PV023R1K1T1WMM1
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PV032R1K4T1NMMC
PV032R1K8T1VMMC
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PV032R9K1T1NFWS
加气设备泄露天然气运输车连接处泄露通过触摸屏快速调整声学成像仪频段，化碳气体泄漏的频段通常在2kHz以上，该现场的频段设置为3kHz-45kHz（黄色框），使用ii9声学成像仪，可以清晰地反映出泄漏点的位置。*重要的是，声学成像仪可以有效现场的噪声。即使现场有很多噪声，声学成像仪也不会受到干扰。Fluke声学成像仪可以设置频段，泄漏点的频率一般在2kHz以上，处于超声波范围；而噪声小于2kHz，可准确设置泄露的频段，现场噪声互不干扰。
