Explosion-Proof Ultrasonic Level Meters Are Required for Measuring Liquid Height in Hazardous Areas

　　In industrial chemical plants, E+H pressure transmitters are often used to measure the level in storage tanks and reactors because they offer two advantages. An explosion-proof ultrasonic level meter is a non-contact level measurement instrument that is easy to install and maintain. The density and viscosity of the liquid do not affect the measurement; installation is convenient, requiring only a hole in the tank top, and there is no need to drain the liquid inside the tank, which simplifies the lengthy installation process for flammable liquids.

　　It is used to measure flammable and explosive liquids such as diesel and crude oil, or to measure liquid height in hazardous areas. It is widely used in explosion-proof environments such as petroleum extraction, refining, chemical, and pharmaceutical industries.

　　I. Selection of ultrasonic level meters for highly corrosive and volatile environments

　　The liquid media in chemical storage tanks are diverse and have different chemical properties. Therefore, the inherent characteristics of the media should be considered when selecting an explosion-proof ultrasonic level meter.

　　First, pay attention to the volatility of the medium. When measuring liquids with volatile media such as sulfuric acid, hydrochloric acid, and nitric acid, a large number of small liquid particles will be suspended in the air inside the tank, causing partial scattering of the sound waves emitted by the ultrasonic level meter. When the level drops to a low position, the ultrasonic level meter may not be able to receive the echo. To avoid this, it is recommended that users increase the measurement distance by 30-50% when selecting the measuring range of the explosion-proof ultrasonic level meter. For example, for a 6-meter-high water tank, choose a 10-meter RBCS21 explosion-proof ultrasonic level meter for measurement.

　　These media are not only volatile but also usually highly corrosive, so it is necessary to consider the anti-corrosion performance of the ultrasonic level meter. For example, the probe of the RBCS21 anti-corrosion ultrasonic level meter made of PVDF / PTFE materials can ensure reliable measurement in corrosive liquids or corrosive environments.

　　For organic solvents such as toluene, xylene, alcohol, and acetone, which are highly volatile media, it is necessary to consider the impact of their volatility on measurement to avoid affecting the sound velocity of the ultrasonic level meter and causing measurement errors.

　　II. Selection of ultrasonic level meters in explosive hazardous environments

　　In petroleum, chemical, and other enterprises with flammable and explosive gases, for safety reasons, they will choose instruments with explosion-proof performance. This is because liquid media not only pose a potential explosion hazard, but also the dangerous gases exposed to the air present certain safety risks. Therefore, enterprises such as wastewater treatment plants need to choose explosion-proof ultrasonic level meters. At present, there are not many ultrasonic level meters with explosion-proof functions that are independently developed and produced in China. Most manufacturers of explosion-proof ultrasonic level meters actually do not have certification. The Rbcs21-x explosion-proof ultrasonic level meter is developed by Hangzhou Nankong Instrument Co., Ltd. and has passed the professional inspection of the Explosion-Proof Electrical Institute. It has authoritative certification and an explosion-proof rating of ExdIICT4Gb.