| 1. Small antenna size, easy to install; Non-contact radar, no wear, no pollution. |
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| 2. Almost no corrosion, bubble effect; almost not affected by water vapor in the atmosphere, the temperature and pressure changes. |
| 3. Serious dust environment on the high level meter work has little effect. |
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| 4. A shorter wavelength, the reflection of solid surface inclination is better. |
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| 5. Beam angle is small, the energy is concentrated, can enhance the ability of echo and to avoid interference. |
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| 6. The measuring range is smaller, for a measurement will yield good results. |
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| 7. High signal-to-noise ratio, the level fluctuation state can obtain better performance. |
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| 8. High frequency, measurement of solid and low dielectric constant of the best choice. |
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