VEGA radar level gauge PS68.DKEFFIDMAX

VEGA radar level gauge PS68.DKEFFIDMAX：

VEGAPULS 69 is a radar sensor used for continuous measurement of solid materials, including under difficult process conditions and over a large measurement range. It is ideal for use in high and narrow silos, solid materials with poor reflectivity such as fly ash, plastic pellets or sawdust, and situations where there is severe interference reflection due to regular internal components.

Measuring principle

Transmitting a continuous radar signal through its lens shaped antenna. The frequency of the signal will change like a sawtooth. The transmitted signal is reflected by the medium and received by the antenna as an echo.

The frequency of the received signal always deviates from the current transmission frequency. The difference in frequency is calculated using algorithms applied in the field of sensor electronics technology. It is directly proportional to the level of the substance in the container.

VEGAPULS69 operates with very low transmission power within the W-band range.

Optimized for solid materials

Due to the excellent focusing effect of the signal, the adhesive on the built-in device of the silo or the container wall has no effect on the measurement. A highly sensitive electronic component that can meet the requirements of solid material measurement can ensure reliable measurement of the material level of different products with a height of 120 meters. This measurement method is not affected by the large amount of dust, filling noise, or airflow generated by pneumatic filling and temperature fluctuations. Its application areas range from the food industry and plastic processing industry to steelmaking and mineral processing.

Folding automatic heavy hammer detection level gauge

It consists of a servo motor, a steel wire rope suspended with a heavy hammer, a material level signaling device, and a display instrument with a microcomputer. After starting, the microcomputer sends a signal to lower the hammer, and the servo motor rotates to lower the hammer. When the hammer touches the material surface, the transmitter sends a signal to the microcomputer to stop the hammer from descending and send a signal to raise the hammer. The motor reverses to raise the hammer and sends the material level signal value to the display instrument.

After the heavy hammer rises to the top of the warehouse, the motor stops running, and after a delay, the above action is repeated. There are also devices such as upper and lower limit alarm signals on the display instrument.

　　VEGA radar level gaugeFolding nuclear radiation type

The level gauge measurement system is shown in the diagram. The lower side of the storage bin is equipped with a gamma ray radiation source, and the upper side of the storage bin is equipped with a gamma ray receiver. As the height of the material surface changes, the intensity of the gamma rays passing through the material layer also varies. The receiver detects the intensity of the injected gamma rays and displays the height of the material level through a display instrument.

Folding ultrasonic level gauge

The top of the storage bin is equipped with an ultrasonic generator and receiver facing the material surface. The ultrasonic waves emitted by the generator are reflected after passing through the air layer and reaching the material surface, with a portion of the reflection being received by the receiver.

The height of the material level can be calculated by multiplying the time taken from ultrasonic emission to reception by the speed of sound. Due to the influence of air temperature on the propagation speed of sound waves, it is necessary to measure the air temperature to correct the sound velocity.

Ultrasonic level gauges are suitable for measuring the level of bulk materials with larger particle sizes. 1. Natural accumulation of materials can cause tilting, so the surface of solid materials is uneven, making it difficult to determine the exact height of the material level; When materials enter and exit, there is a retention zone that affects the measurement of material level positions.

In the hopper or storage bin, solid materials are prone to large pores inside, forming an arch bridge. There are often small gaps inside the powder. The former affects the calculation of material storage, while the latter causes the level of the material to change with vibration, temperature, and pressure changes.

The common problem in interface measurement is that the interface is not clear, and the presence of turbidity or foam will affect the measurement results. In addition, the presence of mixing, piping, and heating equipment inside the container can also have a certain impact on level detection, especially level instruments such as radar waves and ultrasonic waves that rely on echo signals for measurement.

Due to the different characteristics of different industrial production processes, the level gauge needs to be determined according to different process conditions for folding. In order to analyze level instruments more clearly, the working principle, characteristics, and application environment of level instruments require a clear analysis of the process requirements for level measurement.

Firstly, let's analyze the process characteristics of liquid level measurement:

1. The liquid level is a regular surface. But when the liquid flows in and out, it is prone to fluctuations, or when there are changes such as bubbling and boiling during the production process, fluctuations can also occur.

2. Uneven physical quantities such as density, viscosity, or temperature occur throughout the container.

3. There may be high pressure, high temperature, excessive liquid viscosity, a large amount of dirt and impurities, suspended solids, etc. inside the container.

The physical and chemical properties of solid materials are complex, ranging from granular to powdery, and some media are particles of uneven size; The changes in moisture content and temperature of solid materials are also uneven; Silo vibration, irregular silo shape, etc.

VEGA radar level gauge PS68.DKEFFIDMAX