Selection of radar level gauges under different operating conditions

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The last edit to this post was made by zhoudingshengs on 2023-11-9 at 11:11. 1. The impact of the container in which the medium is stored on the selection of a radar level gauge: In the case of open ponds, tanks, or natural water bodies, it has no effect on the radar level gauge that is used. On enclosed containers, the guided-wave radar level gauge can be installed on fittings with a diameter of DN40 as a minimum, while low-frequency and high-frequency horn-type radars can be installed on fittings with a diameter of DN50 as a minimum – provided there is no stirring, foam, steam, or vacuum present. In cases where these conditions exist, high-frequency radars must be installed using flanges with a diameter of DN100, whereas low-frequency radars require flanges with a diameter of DN150. 2. Selection of corrosive liquids: The flanges and cables of guided-wave radar level gauges are typically made of 304 material; for general corrosive liquids, 316 material can be used, while for highly corrosive liquids such as hydrochloric acid and nitric acid, polytetrafluoroethylene material is suitable. The flanges and horns of low-frequency horn antenna radars are typically made of 304 material; for exposure to ordinary corrosive liquids, 316 material can be used. In the case of highly corrosive liquids such as hydrochloric acid and nitric acid, spraying with tetrafluoroethylene is required. The flanges and horns of high-frequency horn antenna radars are typically made of 304 material; for exposure to ordinary corrosive liquids, 316 material can be used. In the case of highly corrosive liquids such as hydrochloric acid and nitric acid, spraying with tetrafluoroethylene is necessary. When encountering strongly corrosive liquids such as hydrochloric acid and nitric acid, low-frequency rod radars and high-frequency rod radars are more suitable. Both of these radars are designed for use in highly corrosive environments. It should be noted that low-frequency rod radars have a relatively large blind zone of 0.5–0.7 meters, which makes them unsuitable for use with small containers. 3. Selection for liquids with foam: A foam layer on the surface of the liquid that is no more than 2 centimeters thick has little impact on measurements; however, if the foam thickness exceeds 2 centimeters, attention must be paid to both the thickness and size of the foam. In foams with a thickness of over 2 cm, fine bubbles are less susceptible to penetration by radar electromagnetic waves compared to larger bubbles. At the same thickness, the thicker the foam, the less likely it is to be penetrated. In this case, a low-frequency horn radar is more suitable than a high-frequency horn radar. If it is a non-adhesive foam, then a guided-wave radar level gauge can easily penetrate the foam and accurately measure the liquid level below it. 4. Selection for steam-filled environments: In environments with steam, it has little impact on guided wave radar. It has the least impact on low-frequency horn-shaped radar, but it also has a significant effect on high-frequency horn-shaped radar level gauges.