A chemical industry group in Hubei is one of the top 500 enterprises in China. It mainly produces industrial yellow phosphorus, industrial sodium tripolyphosphate, food grade phosphoric acid, food sodium pyrophosphate, feed grade tricalcium phosphate, toothpaste grade sodium monofluorophosphate and other products, which are widely used in washing, food, electronics, medicine and other industries. The liquid chlorine storage tank in the storage area of the company was installed with differential pressure liquid level gauge and radar liquid level gauge before. The maintenance and repair is quite cumbersome. Once the instrument fails, it needs to stop production, and then carry out dumping, tank cleaning, purging and other operations. The maintenance cycle is long. Moreover, liquid chlorine is a yellow green, highly toxic and corrosive dangerous chemical. Maintenance and overhaul also bring potential safety hazards.

Through consulting with its peers, the group learned that the non-contact liquid level measuring instrument - External liquid level gauge. The biggest feature of external liquid level gauge is that during maintenance and repair, the storage tank does not need to stop production, open holes, hot work, tank cleaning and other operations, and the measurement is completely free from internal media, which has many advantages, such as safety, cleanliness, efficiency and so on. In the later stage, the instrument is simple and convenient to maintain, with good stability and high precision in the use process, and can accurately measure the actual liquid level of the storage tank. Finally, the group decided to use our company's external liquid level gauge for liquid level measurement for 8 liquid chlorine storage tanks with a height of 2.8 meters. After a period of use, the customer spoke highly of the product.