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technical article
Notes on the level gauge
2011-12-17 11:11:20


超声波液位计 、压变式液位计、雷达液位计磁性浮子液位计 Input level gauge , ultrasonic level gauge , pressure change level gauge, radar level gauge, magnetic float level gauge

The new installation structure of the magnetic float level gauge can resist the impact of the gas phase and prevent ferromagnetic impurities from falling into the takeover, which is mainly reflected in the new type of takeover parts; the lower takeover of the magnetic float level gauge is slightly

A small section that extends into the interior of the device; a slotted water seal structure is set on this section of the takeover. When the magnetic float level gauge operates normally, this structure guarantees that

The lower nozzle is always filled with liquid phase; when there is a gas phase impact, the gas phase always moves upward or obliquely upwards, so that the gas phase cannot replace the liquid phase in the lower nozzle; it cannot enter

The liquid level gauge measurement room avoids the disturbance of the measurement caused by bubbles and the phenomenon of magnetic disturbance;


When the float in the measuring tube of the level gauge changes with the measured liquid level, the magnetic body in the float interacts with the magnetic body in the color bar on the display bar to make it flip, red indicates liquid, white indicates no liquid,

In order to achieve the purpose of accurately displaying the liquid level on the spot. The working principle of the magnetic flip column liquid level gauge is that the magnetic float type liquid level gauge and the measured container form a connector to ensure that the liquid level between the measured container and the measuring tube is equal;

The advantage is non-contact measurement, relatively sanitary, and can detect highly corrosive media;


就不怎么适用了、超声波液位计,就是利用超声波发射 Disadvantages are-the generation and reception of ultrasonic waves have high requirements on the environment. In the case of harsh environments, ultrasonic level gauges are not very suitable. Ultrasonic level gauges use ultrasonic emission.

Receiving principle, non-contact measurement of liquid depth. 的传播速度,在某个温度下是比较恒定的,在已知道速度的情况下,只要计算出超声波的发出到接 The propagation speed of ultrasonic waves is relatively constant at a certain temperature. If the speed is already known, as long as the transmission and reception of ultrasonic waves are calculated,

After receiving the time, the distance from the ultrasonic probe to the liquid surface can be calculated. The depth of the tank or the tank is constant. The distance from the liquid surface to the probe is calculated, and the distance from the liquid surface to the bottom of the tank or the tank is calculated.

Is the depth of the liquid.

The radar level gauge uses the transmission and reception of microwave pulses to measure the depth of the liquid. The radar level score can be contacted or non-contacted. The microwave emission does not require a medium.

It can also be measured under conditions. In addition, the radar can be used in harsh environments, which is much wider than the ultrasonic range;

Drop-in liquid level gauge: Put the sensor probe into the middle of the liquid, and use the pressure of the liquid to measure the depth of the liquid. The disadvantage is that when the liquid is a highly corrosive medium or has a very thick consistency

Medium, input type is not very suitable. The advantage is that it is in direct contact with liquid and the price is relatively cheap;

The pressure change type liquid level is mainly used on the tank body, and its installation methods include thread installation and flange installation. The range of use is relatively narrow, and it can be divided into open tanks and closed tanks. This divides the single flange liquid level and the double flange liquid level.