What are the considerations for selecting a radar water level gauge in different environments and media?

　　 Radar water level gauge It is a measurement instrument based on the time-of-flight principle. The detector emits high-frequency pulses that propagate through space at the speed of light.

　　When selecting a radar level transmitter, the vessel’s volume and geometry should be taken into account. Additionally, the effects of corrosion, foam, and vapor must be considered. The factors that influence radar level measurement are as follows:

　　1. In a sealed vessel, a guided-wave radar level transmitter may be installed on a DN40 nozzle at a minimum. On a DN50 nozzle, both low‑frequency and high‑frequency horn antennas can be mounted, provided there is no agitation, foam, steam, or vacuum.

　　2. The flange and cable of the guided-wave radar level transmitter are made of 304 stainless steel as the standard material. For general corrosive liquids, 316 stainless steel may be used. When exposed to highly corrosive substances such as hydrochloric acid or nitric acid, a tetrafluoroethylene lining can be employed.

　　3. Foaming on the liquid surface with a thickness of no more than 2 cm has little impact on measurements; however, when foam exceeds 2 cm, attention should be paid to both its thickness and size. When measuring bubbles thicker than 2 cm, smaller bubbles are less likely to be penetrated by radar electromagnetic waves than larger ones. Under identical bubble size and conditions, the thicker the foam, the lower the likelihood of penetration.

　　4. Under steam conditions, the impact on guided-wave radar level transmitters is minimal. It has a small effect on low-frequency horn‑type radar but a significant effect on high-frequency horn‑type radar.

　　The Influence of Liquid Containers on Radar Selection

　　If it’s an open-air pool, a water tank, or a natural body of water, there’s no impact on the radar being used. All three are suitable.

　　Guided-wave radar level transmitters, when used in closed vessels, can be equipped with low‑frequency horn‑type radars and high‑frequency horn‑type radars on DN40 nozzles. They can also be installed on DN50 nozzles and are unaffected by agitation, foam, steam, or vacuum conditions.

　　Selection of Corrosive Liquids

　　The flanges and cables of the guided-wave radar level transmitter are made of 304 stainless steel. For general corrosive liquids, as well as highly corrosive media such as nitric acid and hydrochloric acid, 316 stainless steel may be used; in such cases, a Teflon coating is recommended.

　　The flange and horn of the high‑frequency horn‑type radar are, by default, made of 304 stainless steel. For most corrosive liquids, 316 stainless steel is recommended. When encountering highly corrosive substances such as hydrochloric acid or nitric acid, a four‑oxide coating should be applied.

　　Foam Liquid Selection

　　Foam on the liquid surface should not exceed 2 cm; this has little impact on measurements. When foam exceeds 2 cm, attention should be paid to its thickness and size.

　　When measuring bubbles larger than 2 centimeters, small bubbles are less easily penetrated by radar electromagnetic waves than large bubbles. For a given thickness, the thicker the foam, the more difficult it is to penetrate.

　　Steam Environment Selection

　　The steam environment on guided waves Radar water level gauge It has little impact.