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公司創始人王定華，1983年從中國科學院自動化研究所碩士畢業后，在高校任教，長期從事隔離式外測液位測量前沿技術的研究，1990年利用SONAR原理“微振動分析技術”發明了世界首臺聲納式外測液位計。
Wang Dinghua, the founder of the company, graduated from the Institute of Automation of the Chinese Academy of Sciences in 1983, and taught in colleges and universities. He has long been engaged in the research of the cutting-edge technology of isolated external liquid level measurement. In 1990, he invented the world's first sonar external liquid level meter using SONAR principle "micro vibration analysis technology".
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1992年，鄧小平南巡講話，激發了全社會創業的激情和夢想，定華電子（DHE）成立，致力于為世界提供一流的自動化儀表！
In 1992, Deng Xiaoping's speech on his tour to the south inspired the passion and dream of entrepreneurship in the whole society. Dinghua Electronics (DHE) was founded to provide the world with first-class automation instruments!
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ELL聲納式外測液位計量產，并在工業現場大量應用。圖為當時鎮海煉化應用現場。
ELL sonar type external liquid level gauge is mass produced and widely used in industrial field. The picture shows the application site of Zhenhai Refining and Chemical at that time.
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定華電子獲國家高新企業認證，聲納式外測液位計受到國內外專家、用戶及主流媒體關注認可。被稱之為“世界液位測量技術的一場革命。”
Dinghua Electronics was certified as a national high-tech enterprise, and the sonar type external liquid level gauge was recognized by experts, users and mainstream media at home and abroad. It is called "a revolution in world level measurement technology"
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發明“自校準”精度補償技術，測量精度達到0.1級。
The "self calibration" precision compensation technology was invented, and the measurement accuracy reached 0.1 level.
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ELL聲納式外測液位計在氯堿行業成為?；芬何粶y量細分市場第一液位儀表，是各大設計院在液氯、VCM單體儲罐上的首選液位儀表。
ELL sonar type external liquid level gauge has become the first liquid level instrument in the hazardous chemicals liquid level measurement segment market in the chlor alkali industry, and the preferred liquid level instrument for liquid chlorine and VCM single storage tanks in major design institutes.
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定華電子首臺ELL超聲波外測液位開關下線，在工業現場應用。
ELL聲納式外測液位計，首次實現出口。
The first ELL ultrasonic external liquid level switch of Dinghua Electronics was offline and applied in the industrial field.
ELL sonar type external measuring liquid level gauge realizes the outlet for the first time.
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定華電子成為蘭州軍區設備、材料生產（供應商）準入單位。
Dinghua Electronics has become an access unit for equipment and material production (supplier) in Lanzhou Military Region.
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ELL聲納式外測液位計成功應用于中石化千萬噸級煉油項目。
ELL sonar type external liquid level gauge has been successfully applied to Sinopec's ten million ton refining project.
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定華電子通過十余年不懈努力，作為當年唯一一家國內儀表參編企業。推動外測液位儀表進入國家行業標準（HG/T 21581-2009）。標志外測液位儀表成為危險化學品液位測量主流儀表。
Through more than ten years of unremitting efforts, Dinghua Electronics was the only domestic instrument editing enterprise in that year. Promote the external liquid level instrument to enter the national industry standard (HG/T 21581-2009). Mark that the external measuring liquid level instrument has become the mainstream instrument for measuring the liquid level of hazardous chemicals.
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無錫定華2010年7月成立，榮獲無錫市530A類企業，獲得江蘇省民營科技企業認證。致力于物聯網工業傳感器、物聯網信息采集終端設備及工業自動化控制系統應用軟件的研發和銷售。
Founded in July 2010, Wuxi Dinghua was awarded Wuxi 530A Enterprise and Jiangsu Province Private Science and Technology Enterprise Certification. It is committed to the R&D and sales of IoT industrial sensors, IoT information acquisition terminal equipment and industrial automation control system application software.
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采用“變頻超聲波”技術的外測液位開關下線，徹底解決了傳統外測式、外貼、外置液位開關可靠性差、精度一般、人工維護量大的問題。
定華電子與西安交大共建物聯網技術工程研究中心。
The off-line of the external liquid level switch using the "frequency conversion ultrasonic" technology has completely solved the problems of poor reliability, general accuracy and large manual maintenance of the traditional external measuring, sticking and external liquid level switches.
Dinghua Electronics and Xi'an Jiaotong University jointly built the Internet of Things Technology Engineering Research Center.
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定華電子榮獲陜西省科學技術一等獎。
Dinghua Electronics won the first prize of Shaanxi Science and Technology Award.
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ELL外測液位儀表累計銷售量超過10000臺。贏得廣大用戶、設計單位高度評價。定華電子成為軍方、中石油、中石化、中海油、中化等大型企業集團產品優秀供應商。
The accumulative sales volume of ELL external liquid level instruments exceeds 10000. It has won high praise from users and design units. Dinghua Electronics has become an excellent supplier of products of large enterprise groups such as the military, PetroChina, Sinopec, CNOOC and Sinochem.
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本質安全型外測液位儀表下線。因業務發展需要，定華電子股份化改制，正式更名為西安定華電子股份有限公司。
The intrinsically safe external liquid level instrument is offline. Due to the needs of business development, Dinghua Electronics was restructured into Xi'an Dinghua Electronics Co., Ltd.
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定華電子作為中國?；穬\監控領域第一股登陸新三板（股票簡稱：定華電子，股票代碼：837793），在全國中小企業股份轉讓系統掛牌上市。
Dinghua Electronics, as the first stock in the field of monitoring the storage and transportation of dangerous chemicals in China, landed on the NEEQ (stock abbreviation: Dinghua Electronics, stock code: 837793) and was listed in the national SME stock transfer system.
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外測液位儀表通過上海儀器儀表自控系統檢驗測試所《功能安全完整性等級認證》SIL3認證。
The externally measured liquid level instrument has passed the SIL3 Certification of Functional Safety Integrity Level issued by Shanghai Institute of Instrumentation and Automatic Control System Inspection and Testing.
針對罐區SIS系統液位測量要求，推出ELL-FI-CE增強型2代聲納式外測液位計。
According to the requirements of SIS system liquid level measurement in tank farm, ELL-FI-CE enhanced Generation 2 sonar type external liquid level gauge is introduced.
定華電子獲評陜西省“專精特新”中小企業。
Dinghua Electronics was awarded the title of "Specialized, Special and New" SME in Shaanxi Province.
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定華電子榮獲國家技術發明獎二等獎。ELL超聲波外測液位開關增強Ⅲ代量產，新增防雷，故障遠傳輸出功能，主機采用雙腔隔爆設計。
Dinghua Electronics won the second prize of the National Technological Invention Award. ELL ultrasonic external liquid level switch has enhanced the mass production of Generation III, added lightning protection and fault remote output functions, and the host adopts dual chamber explosion-proof design.
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DHE系列雷達物位計，音叉液位開關大規模應用。并且定華電子獲得西安市科技小巨人企業認定。
DHE series radar level meter and tuning fork level switch are widely used. And Dinghua Electronics was recognized as a small giant enterprise of science and technology in Xi'an.
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定華電子榮獲“陜西工業精品”、西安市“軍民融合”企業、陜西省“軍民融合”重點產品。
Dinghua Electronics won the title of "Shaanxi Industrial Boutique", "Xi'an Military civilian Integration" enterprise, and "Shaanxi Military civilian Integration" key product.
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定華電子獲評“陜西省重點科技創新團隊”。
Dinghua Electronics was awarded the "Key Scientific and Technological Innovation Team of Shaanxi Province".
股票簡稱：定華電子 股票代碼：837793
