Selection of Radar Level Gauges for Corrosion/Foam/Vapor Environments

When selecting a radar level gauge, in addition to judging by the shape of the tank, it is also necessary to consider the effects of corrosion, foam, steam, etc. 1. If it is in an open pool, water tank, or natural waters, it has no effect on the selection of the radar level gauge. On a closed container, the guided wave radar level gauge can be installed on the DN40 nozzle, and the low-frequency bell-mouth radar level gauge and the high-frequency bell-mouth radar level gauge can be installed on the DN50 nozzle, provided there is no stirring, foam , steam, vacuuming, if there are these situations, the high-frequency radar should be installed with a DN100 flange, and the low-frequency radar should be installed with a DN150 flange. 2. The flange and cable of the guided wave radar level gauge can be made of 316 material when encountering general corrosive liquids, and PTFE-lined when encountering strong corrosive liquids such as hydrochloric acid and nitric acid. The flange and bell mouth of the low-frequency bell-mouth radar are made of 304 material as standard. When encountering strong corrosive liquids such as hydrochloric acid and nitric acid, the low-frequency rod-type radar radar level gauge and the high-frequency rod-type radar level gauge are more suitable. Both radar level gauges are designed for use in highly corrosive environments. 3. There is no more than 2 cm of foam on the surface of the liquid, which has little effect on the measurement. If the foam exceeds 2 cm, pay attention to the thickness of the foam and the size of the foam. Among foams measuring more than 2 cm, fine foams are less easily penetrated by radar electromagnetic waves than larger ones. Under the same size foam, the thicker the foam, the less likely it is to penetrate. In this case, it is more suitable to use a low-frequency bell-mouth radar level gauge than a high-frequency bell-mouth radar level gauge. If it is non-adhesive foam, the guided wave radar level gauge can penetrate the foam and accurately measure the liquid level below the foam. 4. In a steam environment, it has little effect on the guided wave radar level gauge. It has little influence on the low frequency bell mouth radar level gauge, and also has a great influence on the high frequency horn mouth radar level gauge.

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