Non-explosion-proof radar level meter

Project Overview

1. Overview

The non-explosion-proof radar level gauge is an instrument that uses the principle of electromagnetic waves to measure the height of liquids. It is used in chemical, electric power, petroleum, food and other industries. Compared with other liquid level measurement technologies, non-explosion-proof radar level gauges have the following advantages:

Non-contact measurement: No need to contact the medium, avoiding contamination and corrosion during the measurement process. : The measurement accuracy can reach millimeter level, meeting most application requirements. Strong anti-interference: not affected by medium density, temperature, pressure, viscosity and other factors. Low maintenance: simple structure, no regular maintenance required. Flexible installation: can be installed on various containers to adapt to different working conditions.

However, non-explosion-proof radar level gauges also have some disadvantages, such as:

Higher price: Compared with other level gauges, the price of non-explosion-proof radar level gauges is relatively higher. Susceptible to steam: In high humidity environments, steam can affect measurement accuracy. There are certain requirements for the installation location: installation in locations with strong electromagnetic interference should be avoided.

2. Working principle

The working principle of non-explosion-proof radar level gauge is based on the time difference method, that is, it emits a pulse signal that propagates in the medium and is reflected by the surface of the medium Back, the receiver receives the reflected signal and calculates the time difference between the transmitted and reflected signals, thus calculating the liquid level height. The specific process is as follows:

Transmitting a pulse signal: The radar transmitter emits a high-frequency electromagnetic pulse signal that propagates at the speed of light. Signal reflection: The pulse signal encounters the boundary of the liquid level and generates a reflected wave. Receiving reflected signals: The radar receiver receives reflected waves. Calculate time difference: The radar controller calculates the time difference between the transmitted signal and the reflected signal. Convert liquid level: Calculate the liquid level based on the time difference and the speed of light.

Non-explosion-proof radar level gauges usually use electromagnetic waves with a frequency of 26GHz or 80GHz for measurement. High-frequency electromagnetic waves have good directivity, which can effectively reduce the impact of interference signals and improve measurement accuracy. At the same time, high-frequency electromagnetic waves have shorter wavelengths and can effectively measure small-scale liquid level changes.

Figure 1 illustrates the working principle of a non-explosion-proof radar level gauge.

Figure 1 Schematic diagram of the working principle of a non-explosion-proof radar level gauge

3. Main components

The non-explosion-proof radar level gauge mainly consists of the following parts :

Transmitter: emits a high-frequency electromagnetic pulse signal. Receiver: Receives reflected signals. Controller: Processes the received signal and calculates the liquid level. Display: Displays the liquid level. Sensor: Mounted on the container for transmitting and receiving signals to the controller.

Figure 2 shows the typical structure of a non-explosion-proof radar level gauge.

Figure 2 Structural diagram of non-explosion-proof radar level gauge

4. Advantages

Compared with other liquid level measurement technologies, non-explosion-proof radar level gauge has Advantages of:

ContactlessMeasurement: There is no need to contact the medium, which avoids problems such as pollution, corrosion, and wear during the measurement process. It is especially suitable for highly corrosive, easy-to-scale, and toxic media. Application: Suitable for various liquids, including water, oil, chemicals, slurries, etc. : The measurement accuracy can reach millimeter level, and some models can even reach sub-millimeter level, meeting most application needs. Strong anti-interference: not affected by factors such as medium density, temperature, pressure, viscosity, color, bubbles, etc., as well as changes in the dielectric constant of the medium. Low maintenance: simple structure, no regular maintenance required. Flexible installation: It can be installed on various containers, including round, square, rectangular, conical and other shapes to adapt to different working conditions. High reliability: long service life and low maintenance costs.

5. Application fields

Non-explosion-proof radar level gauges are used in the following fields:

Chemical industry: measuring reactors, storage tanks, pipelines and other equipment Liquid level. Electric power industry: measuring boiler water level, steam drum water level, condensate water level, etc. Petroleum industry: measuring the liquid level of oil storage tanks, oil wells and oil pipes. Food industry: Measuring the liquid level of food processing equipment and storage tanks. Pharmaceutical industry: measuring the liquid level of pharmaceutical production equipment and storage tanks. Environmental protection industry: measuring the liquid level of sewage treatment equipment, pools, and rivers. Agriculture: Measuring the liquid level of irrigation equipment and reservoirs.

6. Precautions

When using non-explosion-proof radar level meter, you need to pay attention to the following matters:

Installation angle: The installation angle should be consistent with the radar emission direction. Avoid reflected waves that cannot be recycled to the receiver. Installation location: Avoid installation in locations with strong electromagnetic interference, such as near motors, transformers, etc. Medium characteristics: Different media have different dielectric constants. Before installation, you need to know the dielectric constant of the medium in order to set the instrument parameters. Container material: The container material will affect the intensity of the reflected wave. Choosing the appropriate material can improve the measurement accuracy. Effect of steam: In a high-humidity environment, steam will affect the measurement accuracy, and corresponding anti-steam measures need to be taken.

7. Summary

The non-explosion-proof radar level gauge is a liquid level measuring instrument with high reliability, high accuracy and low maintenance. It has been widely used in industrial production. . With the continuous development of technology, the performance of non-explosion-proof radar level gauges continues to improve, and its application fields continue to expand. In the future, non-explosion-proof radar level gauges will develop in a more intelligent, digital, and networked direction, providing more efficient and reliable liquid level measurement solutions for industrial production.