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capacitive fuel level gauge
1. What is a capacitive fuel level gauge
There are many types of fuel level gauges, and capacitive fuel level gauges are one of them. It is a device that converts changes in the position of the measured object into capacitance. It is used in the field of industrial and agricultural production. The application is more extensive. The capacitive fuel level gauge can measure the fuel level of strong corrosive medium, the fuel level of high-temperature medium, the fuel level of sealed container, and the viscosity and density of the medium.Degree, work pressure has nothing to do.
2. What is the working principle of the capacitive fuel level gauge?
The capacitive fuel level gauge is developed based on the principle of capacitive sensing. The change of the measuring capacitance is used to measure the unevenness of the fuel surface. When the measured medium is immersed in the height change of the measuring electrode, causing a change in its capacitance. It can convert the changes of various material levels and fuel level medium heights into standard current signals, and transmit them to the operation control room for secondary instrument or computer installation.
Centralized display, alarm or automatic control. The specific principle is: A metal rod is inserted into the fuel container, the metal rod acts as one pole of the capacitor, and the container wall acts as the other pole of the capacitor. The medium between the two electrodes is the fuel and the gas. Since the dielectric constant s1 of the dry fuel is different from the dielectric constant s2 on the fuel surface, for example: e1>82, when the fuel level rises, the total dielectric constant between the two electrodes of the capacitive fuel level gauge. The value increases accordingly and therefore the capacitance increases. Conversely, when the fuel level drops, the value decreases, and the capacitance also decreases. Therefore, the capacitive fuel level gauge can pass through the capacitance between the two electrodes. Change the bump to measure the fuel level.
Capacitive fuel level sensors usually consist of two parts, the sensing part and the signal processing part. The sensing part is a coaxial container, in which a metal rod is inserted into the fuel container as the positive pole, and the other metal shell is fixed outside as the negative pole. When the oil enters the container, it causes a change in the capacitance between the sensor housing and the sensing electrode.
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