A certain company is located in Fujian Province, and its main business scope includes licensed projectsProduction of hazardous chemicals; Production of food additives; Operation of hazardous chemicals; Disinfectant production (excluding hazardous chemicals); Mobile pressure vessel/gas cylinder filling. General project: Production of chemical products (excluding licensed chemical products); Manufacturing of synthetic materials (excluding hazardous chemicals); Thermal production and supply; Sales of chemical products (excluding licensed chemical products); Import and export of goods; Non residential real estate leasing.

In January 2025, the company had 3 liquid chlorine horizontal tanks that needed to be equipped with external level measuring instruments. Due to the display of empty tanks, after product recommendation, a low-level calibration unit was added. The liquid level displayed 0 below the blind spot, and returned to normal when it was above the blind spot. This solved the problem of false liquid level uploading to provincial security checks caused by customer empty tank signals. Since its use, the effect has been good.