Radar Level Measurement

Description

The QTRD 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. The running time can be converted into a liquid level signal by electronic components. When propagating, when the pulse meets the surface of the material, it will be reflected back and received by the receiver inside the instrument, which will become a distance signal and converted into a level signal.

Working Principle

The radar liquid level gauge is a radar liquid level gauge based on the principle of time domain reflection (TDR). The electromagnetic pulse of the radar liquid level gauge propagates along the steel cable or probe at the speed of light. When it encounters the surface of the measured medium, the radar liquid level Part of the pulse of the meter is reflected to form an echo and returns to the pulse transmitting device along the same path. The distance between the transmitting device and the surface of the measured medium is proportional to the propagation time of the pulse in between, and the liquid level height is calculated.

Measurement method: It is a radar level gauge based on the principle of time domain reflection (TDR). Part of the pulse of the radar level gauge is reflected to form an echo and return along the same path. However, considering the effects of corrosion and adhesion, the measurement range is The final value should be at least 100mm from the tip of the antenna. For the overflow protection, a safety distance of radar level gauge can be defined and attached to the blind zone. The minimum measurement range is related to the antenna. With different concentrations, the foam can absorb microwaves and reflect them, but it can be measured under certain conditions. Return to the pulse transmitter.

Product Advantages

1. Can be measured in vacuum. It can measure all media with a dielectric constant> 1.2, and the measurement range can reach 70m;

2. The power supply and output signal pass through a two-core cable (loop circuit), using 4…20mA output or digital signal output;

3. Non-contact measurement and installation are convenient. Extremely stable materials are used. It is firm and durable, with accurate and reliable resolution up to 1mm;

4. Not affected by noise, steam, dust, vacuum and other working conditions;

5. Not subject to the change of medium density and temperature, the process pressure can reach 400bar, and the medium temperature can reach -200℃ to 800℃;

6. There are many installation methods to choose from: top installation, side installation, bypass pipe installation, and waveguide installation.