How to know the liquid level inside the oil tank?

How to get the liquid level inside the oil tank?

Tank level monitoring is very important when storing and transporting hazardous chemical gasoline and diesel liquids. The level of liquid inside the tank is key to ensuring safety and also helps in efficient inventory management. In this article, we will introduce how the liquid level information is generated and how the liquid level data is displayed to the user.

Measuring device
The key to obtaining data is the detection sensor. The liquid level height can be obtained by using a float level gauge, pressure sensor, electrostatic level gauge, suspended ultrasonic level gauge, or water gauge.
Although the water gauge is not as advanced as modern liquid level monitoring technology, the traditional water gauge is still a simple and effective liquid level measurement tool. You can quickly obtain an approximate liquid level height by inserting the water gauge into the oil tank and observing the correspondence between the liquid level and the water gauge scale. However, this method usually requires manual operation and is unsuitable for large oil tanks or situations requiring continuous monitoring.

The float level gauge is a traditional and commonly used liquid level monitoring device. It is a float that moves up and down as the liquid level changes. Through the position of the float, the liquid level height can be accurately determined. This method is simple reliable and suitable for various types of liquids, but requires regular maintenance to ensure accuracy.

carbon rod
The measuring tool used by our company is a type of float level gauge: a carbon rod for the liquid level gauge. A liquid level meter carbon rod is a technology that uses the conductive properties of carbon materials to determine the level of liquid by measuring the difference in conductivity between liquid and gas. The carbon rod of the liquid level meter consists of at least two carbon rods, one placed above the liquid surface and the other placed below the liquid surface. When the liquid level rises above the carbon rod, the conductivity in the liquid will cause current to flow through the carbon rod, thereby generating a liquid level signal; when the liquid level drops below the carbon rod, the current will no longer flow through the carbon rod and will stop. Generation of the liquid level signal. Current signals on the market generally use international standard current 4~20ma. According to the different needs of manufacturers and customers, the signal processing methods of carbon rods are also different. For customers who require a 485 communication connection, the carbon rod manufacturer will re-process the inside of the carbon rod before leaving the factory, so that the output mode is positive and negative power plus Two AB communication lines, coupled with a set of fixed protocols, eliminate the need for customers to perform ADC sampling processing on carbon rod signals. This kind of carbon rod greatly eases development difficulty for developers.

Carbon rod wireframe
When using carbon rods with original current signals, we often need to convert the current signal into a voltage signal and also need to design a sampling circuit to keep the signal stable within a certain range, and finally convert the sampled voltage into liquid The bit height is sent to the mobile phone or server through the display interface or communication module. The advantage of this carbon rod is that the integrated product can replace various carbon rods because the circuit is the same, the measuring range can be set in the program, and the applicability is wide.
Whichever method you choose, equipment should be inspected and maintained regularly to ensure accuracy and reliability.

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