What is a liquid level gauge:
The height of the liquid medium in the container is called the liquid level, and the instrument for measuring the liquid level is called a liquid level gauge.The liquid level gauge is a kind of level instrument.
The good structure and installation method of the level gauge can be applied to high temperature, high pressure, strong corrosion, easy crystallization, anti-blocking, anti-freezing and solid powdery and granular materials.It can measure the liquid level of strong corrosive medium, the liquid level of high temperature medium, and the liquid level of sealed container, which has nothing to do with the viscosity, density and working pressure of the medium.
First, the selection of the radar level gauge
All kinds of liquid level instruments have their own characteristics and advantages. When choosing an instrument for the measurement medium, various factors should be considered comprehensively, including the characteristics of the measured medium, the purpose of medium measurement, environmental conditions and economic conditions, etc. factor.Try to maximize the strengths and avoid weaknesses among many instruments, and choose the instrument suitable for the measurement medium and purpose.
Second, consider the characteristics of the measured medium
Since there are many types of radar level gauges, before measuring, the pressure, temperature, density and other characteristics of the measured medium should be considered first, and the appropriate antenna and meter should be selected in a targeted manner.For high temperature or highly corrosive media, a non-contact antenna radar level gauge should be used so that the level gauge does not come into direct contact with the liquid, which can not only ensure the accuracy of the measurement data, but also protect the level gauge from damage.
3. Consider the purpose of medium measurement
When selecting radar level gauges, the purpose of medium measurement should also be considered, so that level gauges with different measurement accuracy can be selected.In order to save investment as much as possible, on the premise of meeting the measurement accuracy, choose a liquid level gauge with high cost performance as much as possible.If the purpose of medium measurement is for internal accounting, the requirements for accuracy do not need to be too high.If the purpose of medium measurement is for foreign trade, it is necessary to choose a high-precision liquid level gauge.
4. Consider other factors
In addition, when selecting a radar level gauge, other factors such as environmental conditions, installation conditions, economic conditions, and measurement range and frequency need to be considered.
5. Installation of radar level gauge
The installation of the radar level gauge is also a very important part of liquid level measurement. In order to ensure the normal and stable operation of the radar level gauge, it is necessary to use scientific and reasonable installation methods to reduce the occurrence of various failures.During installation, the antenna should be kept in balance with the measurement tank wall, and the distance between the installation position should be 300mm greater than the tank wall, keeping a sufficient distance, otherwise it is easy to cause abnormal echo signals and cause false echo signals.
When measuring corrosive or easily crystallized objects, in order to avoid the influence of various factors on the antenna and prevent the crystallization existing on the antenna from affecting the normal work, the instrument should be selected in a targeted manner, thereby reducing the occurrence of various faults , to prevent bias in the obtained data.
Application of radar level gauge in oil tank
The radar level gauge is a general-purpose radar level gauge. It is a measuring instrument based on the principle of time travel. The radar wave runs at the speed of light, and the running time can be converted into a level signal through electronic components.The probe emits a high-frequency pulse that propagates in space at the speed of light. When the pulse hits the surface of the material, it is reflected back and received by the receiver in the instrument, and the distance signal is converted into a level signal.
Key Benefits of Radar Level Gauge
Radar level gauges are widely used, whether it is toxic media or corrosive media, it can be measured, and its biggest feature is that it can work under extremely harsh conditions.In terms of measurement, the main advantages of radar level gauges are as follows:
1. Accurate, efficient and energy saving
The radar level gauge can measure under vacuum and pressure, and it is accurate and reliable with high reliability.Due to the characteristics of electromagnetic waves, it is not subject to any restrictions and is not affected by the environment, and can be applied to various occasions.The probe of the radar level gauge has no contact with the surface of the medium, which belongs to non-contact measurement, and can measure different media continuously, accurately and quickly.The probe of the radar level gauge is hardly affected by temperature, pressure, gas, etc. (the influence is only 0.018% at 500°C, and 0.8% at 50bar).The chemical and mechanical properties of the materials used in the radar level gauge are quite stable, and the materials can be recycled, which is extremely environmentally friendly.
2. It has the function of suppressing the interference echo
Interference echoes caused by joints within the beam range, interference echoes caused by feeding or discharging noise, etc. can be automatically suppressed by the internal fuzzy logic control.
3. Easy maintenance and simple operation
The radar level gauge has fault alarm and self-diagnosis functions. It can analyze the fault according to the error code prompted by the operation display module, determine the fault in time and eliminate it, making maintenance and calibration more convenient and accurate, and ensuring the normal operation of the instrument.
4. Strong reliability
Microwaves are not in direct contact with the measurement medium, and are almost undisturbed in various measurement situations such as vacuum measurement, liquid level measurement or material level measurement.Due to the use of high-quality materials, it can be used under extremely complex chemical and physical conditions to provide accurate, reliable, long-term stable analog or digital level signals.
5. Wide range of application
The radar level gauge has a wide range of applications. From the measured medium, it can measure liquid, particles, slurry, etc.From the shape of the tank body, the radar level gauge can measure the liquid level of spherical tanks, horizontal tanks, cylindrical tanks, cylindrical cone tanks, etc.In terms of tank functions, it can measure the liquid level in storage tanks, buffer tanks, microwave tubes, and bypass tubes.
