products are widely used in petroleum, petrochemical, chemical, storage and transportation, military oil depots, electric power, medicine, new energy and other fields, and have become the main suppliers of large enterprise groups and military automation instruments such as Sinopec, PetroChina, CNOOC, Sinochem and so on.
In 1990, Professor Wang Dinghua, the founder of Dinghua Electronics, invented the ELL external liquid level measuring instrument, which accurately measures the liquid level from outside the container, and realizes a truly isolated non-contact liquid level measurement. It is the world's first for Chinese instrument companies and its technology is at home and abroad. The advanced level is a technological revolution in liquid level measurement technology. It has been used for a long time in hundreds of working conditions of various containers in more than 1,000 enterprises at home and abroad, and has won high praise from users. In 2009, Dinghua Electronics promoted the entry of external liquid level measurement instruments into the national industry standard-China Chemical Industry Standard (HG/T 21581-2010)-Automatic Control Installation Atlas. External liquid level measurement instruments have become the mainstream instruments for liquid level measurement.
