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technical article
Guided Wave Radar Level Meter Features and Installation
2012-1-7 11:22:26

Guided wave radar is a measuring instrument based on the principle of time travel. High-frequency radar pulse wave runs along the detection component (steel cable or steel rod) at the speed of light; during operation, it encounters reflection caused by the measured medium (due to abrupt change in dielectric constant). Pulse energy is reflected

come back. The time interval between the transmitted pulse and the reflected pulse is proportional to the distance of the measured medium. The reflected echo is accepted by the receiver in the instrument, and the distance signal is converted into a level signal.


Features:


可以应用于各种复杂工况。 Due to the use of advanced microprocessors and unique echo processing technology, guided wave radar level gauges can be used in a variety of complex conditions.


A variety of process connection methods and types of detection components make SDFLEX60 series guided wave radar level gauges suitable for a variety of complex working conditions and applications. Such as: high temperature, high pressure and small dielectric constant medium.

Using pulse working mode, the guided wave radar level gauge has extremely low transmission power, and can be installed in various metal and non-metal containers without harming human body and the environment.

The high-frequency microwave pulses emitted by the wave radar travel along the detection component (steel cable or steel rod). When encountering the measured medium, due to the abrupt change of the dielectric constant, a part of the pulse energy is reflected back. Time interval between transmitted and reflected pulses

It is proportional to the distance of the measured medium. There are two different media in the container. When the dielectric constant of the upper layer is small and the dielectric constant of the lower layer is large, when the high-frequency micropulse propagates along the detection component and encounters the upper layer, due to

Its dielectric constant is small, so very little energy is reflected by this layer of interface, and most of the energy penetrates the upper layer of the medium and continues to propagate downward. When encountering the two-layer interface, the dielectric constant of the lower layer is larger , So there will be more energy

Reflected back. Therefore, guided wave radar is an interface that can measure two different media. The measurement conditions are that the upper medium is non-conductive or its dielectric constant is lower than the dielectric constant of the lower medium by more than 10.


Features: Due to the use of advanced microprocessors and unique EchoDiscovery echo processing technology, guided wave radar level gauges can be applied to a variety of complex working conditions. A variety of process connection methods and types of detection components,

适用于各种复杂工况及应用场合。 The GDUL3X series guided wave radar level gauge is suitable for various complicated working conditions and applications. Such as: high temperature, and small dielectric constant medium. Using pulse working mode, guided wave radar level gauge has extremely low transmitting power, which can be installed in various

There is no harm to human body and environment in metal and non-metal containers.


Installation requirements: Make sure that cables or rods do not come into contact with internal obstacles throughout the entire range. Therefore, avoid installations in the tank as much as possible, such as: people ladders, limit switches, heating equipment, brackets, etc. Also note that cables or rods must not

The streams intersect. Also pay attention when installing the meter: the highest material level must not enter the measurement blind zone; the meter must be kept a certain distance from the tank wall; the meter should be installed so that the direction of the cable or rod is perpendicular to the surface of the measured medium. The meter installed in the explosion-proof area

The installation regulations of the national explosion-proof danger zone must be observed. The intrinsically safe housing is an aluminum case. Intrinsically safe instruments can be installed in places with explosion-proof requirements.


的测量盲区。 Measurement blind zone: The measurement blind zone of the guided wave radar level gauge is in a section downward from the reference plane of the measurement and a section where the cable or rod's lowest part cannot be accurately measured.