The radar level gauge has the advantages of low maintenance, high performance, high precision, high reliability, and long service life. When measuring the liquid level of a container, it is affected by many external conditions such as the shape, size, diameter, and material of the container, as well as the physical and chemical properties of the medium such as steam, foam, and corrosive volatility.1. Installation requirements and selection of radar level gauges in general containers:If it is in an open pool, water tank, or natural waters, it will have no effect on the radar used. All three can be used. On a closed container, the smaller guided wave radar level gauge can be installed on the DN40 connector, and the low-frequency horn radar and high-frequency horn can be installed on the DN50 connector, provided that there is no stirring, foam, steam, or pumping. For vacuum, if these conditions exist, DN100 flanges should be used for small high-frequency radars, and DN150 flanges should be used for low-frequency radars.2. Selection and precautions of radar level gauge in corrosive liquid:The flange and cable of the guided wave radar level gauge are made of 304 by default. 316L can be used for general corrosive liquids, and PTFE can be used for strong corrosive liquids such as hydrochloric acid and nitric acid.The flange and horn mouth of the low-frequency horn radar are made of 304 by default. In the case of general corrosive liquids, 316L material can be selected. When encountering strong corrosive liquids such as hydrochloric acid and nitric acid, spraying PTFE is necessary.The flange and bell mouth of the high-frequency horn radar are made of 304 by default, and 316L material can be selected when encountering general corrosive liquids, and when encountering strong corrosive liquids such as hydrochloric acid and nitric acid, spraying PTFE is necessary.When encountering strong corrosive liquids such as hydrochloric acid and nitric acid, low-frequency rod radar and high-frequency rod radar are more suitable. Both of these radars are designed for use in highly corrosive environments. It should be noted that the blind area of low-frequency stick radar is relatively large, 0.5-0.7 meters, which is not suitable for small tanks.3. Selection and precautions of radar level gauge in foamy liquid:If there is no more than 2 cm of foam on the surface of the liquid, it will not have much effect on the measurement. For foams larger than 2 cm, attention should be paid to the thickness and size of the foam.Among foams measuring more than 2cm, small foams are less likely to be penetrated by radar electromagnetic waves than large foams. With the same thickness, the thicker the foam, the less likely it is to penetrate.In this case, low-frequency horn-mouth radar is more suitable than high-frequency horn-mouth radar. If it is a non-adhesive foam, the guided wave radar level gauge can easily penetrate the foam and correctly measure the height of the liquid level below the foam.Fourth, the selection and precautions of the radar level gauge in a steam environment:
In the presence of steam, it has little effect on guided wave radar. The impact on low-frequency horn-mouth radar is small, and it also has a big impact on high-frequency horn-mouth radar.
Post time: 21-09-21