The Water level electrode often appears in important dam projects, or some factory boiler rooms also have water level electrodes. In fact, the working principle of water level electrodes is well understood, and it plays a huge role.
Water level electrodes often appear in important dam projects, or some factory boiler rooms also have water level electrodes. In fact, the working principle of water level electrodes is well understood, and it plays a huge role.
As the name implies, there is a word "water level" in the water level electrode, so it is a tool for measuring the water level, and the last two words are electrodes. It can be seen that it is inseparable from electricity, and the working principle of the water level electrode is based on water. Or the conductivity of steam is used to measure the water level, so as to send out specific water level data to the outside world. However, many water level electrodes have indicator lights, which will light up according to different resistances. People can also judge according to the number of indicator lights. The depth of the water level, this is the working principle of the water level electrode.
The obvious open or short-circuit of the electrode can be measured with the resistance file of a multimeter. It is not ideal to use the multimeter's buzzer to measure the presence or absence of water level. The reason is that the buzzer can be used to measure the on-off of the circuit, but the resistance range for stopping and sounding is limited, which may lead to misjudgment. Because we know that measuring the water level with electrodes is based on the difference in electrical resistivity between water and steam, that is, the electrode of the water level cylinder has a small impedance to the cylinder in water, and has a large impedance to the cylinder in steam. In the measurement, the resistance is not equal to zero when the electrode is immersed in water, and the resistance is infinite when the electrode is not immersed in water. When judging the fault on the spot, it is better to check whether the electrode is normal or not in conjunction with the indication of the display instrument.
Due to the great difference between the electrical resistivity of water and steam, the electrical resistivity of saturated steam produced by high-pressure boilers is generally tens of thousands to hundreds of thousands of times greater than that of saturated water, and is also higher than that of saturated steam condensate. To be more than 100 times larger. Therefore, saturated steam can be regarded as a non-conductor (or a high-resistance conductor) and water as a conductor (or a low-resistance conductor). The electric contact water level gauge uses this principle to determine the position of the soda-water interface by measuring the resistance between the electrodes in the soda-water medium in the measuring cylinder connected to the container. The advantages of the electric contact water level gauge are: it can adapt to the variable parameter operation of the boiler, has small delay, simple structure, intuitive display, low cost and convenient maintenance. The disadvantage of the electric contact water level gauge is that the electrode is immersed in soda water for a long time, which is easy to cause corrosion and leakage, as well as the fixed error caused by the discontinuity of the display.
The working principle of the water level electrode is very simple, and as long as you imagine it a little bit, you can feel the image that it brings a huge effect. I believe that with the development of technology, more and more irrelevant people will understand the working principle of the water level electrode. , And make a greater contribution to the world through this magical water level measuring instrument.