The electromagnetic impulse travels along the steel cable or bar at the speed of light. When it encounters the surface of the measured medium, part of the impulse will be reflected to form an echo and returns to the impulse launcher along the same path. The distance between the launcher and the surface of the measured medium is proportional to the propagation time of the impulse, then we can get the height by calculation.
H = H - v * t / 2
( In the formula) ： h→( level of material)
H→height of empty status(total height)
V→ Radar wave speed(approximately to light speed 3*108m/s)
T→Time interval between wave emitted and received
Guided wave radar level transmitter mainly consists of housing shell, PCB, operation and display panel, flange, antenna, sensor and etc.
3.1 The electromagnetic waves emitted are constant and do not require field verification or migration to change the range.
3.2 Various installing methods, can be connected by thread or flange.
3.3 Changes in temperature, pressure and density have no effect on the measurement.
3.4 There are no moving parts during the measuring process, no mechanical parts damaged problems, free maintenance.
3.5 Almost any liquid or stationary particle medium can be measured.
3.6 The disadvantage is there are blind zones at the top and bottom. The minimum dead zone on the top is 0.25m.
HCDAR-56 has coaxial type guided wave antenna structure, because of the structure of guided wave tube, when the measured medium fluctuates greatly, underthe isolation of tube, the internal fluctuation is slightly. So it is suitable for measuring the liquids with obviously fluctuation on surface, meanwhile the coaxial structure also improves the strength of signal transmitted, so it is also suitable for measuring the liquids with low dielectric constant.
Hcdar-56 radar manufactured by our company can be used to measure liquid level of solid powder and low dielectric constant.The figure shows two horizontal canisters of our company's radar level meter applied in a perfume factory.The permittivity of the measured materials is relatively low in the field application. After the field confirmation, hcdar-56 radar of our company is selected, and the users respond well after it is put into use.