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Shenyang Yuguang Temperature Instrument Co., Ltd. is a sole proprietor founded in China with a long history. Its predecessor was a hi-tech
enterprise established in 1985 specializing in research, development and production of fully sheathed thermocouples and fully sheathed
RTDs and it was the first company engaged in R&D of sheathed RTDs in China and one of the first private enterprises in China.
The company successfully developed the first batch of sheathed thermocouples in the country at the beginning of 1980s and national
patents were obtained in 1986 and 1987. In 1988, Yuguang’s products were assessed as technologically advanced with domestically
leading quality and having reached the advanced level of similar products in the world by China CACS Engineering Corporation. In 2001, the
company successfully developed hydrophobic probe – high temperature high pressure rapid thermocouple and high temperature high
pressure rapid RTD, and obtained nation patents on July 10, 2002 and, in the same year, these two products were granted the Certificate for
National Key New Product (high temperature high pressure rapid thermocouple certificate No. 2002ED422007, high temperature high
pressure rapid RTD certificate No. 2002ED422011) by the Ministry of Science and Technology, State Administration of Taxation, Ministry of
Foreign Trade and Economic Cooperation, General Administration of Quality Supervision, Inspection and Quarantine of the People’s
Republic of China, and State Environmental Protection Administration. In 2003, the fully sheathed rapid RTD developed by the company for
bearing bush was also granted the Certificate for National Key New Product (certificate No. 2003ED147006) by the above five ministries and
administrations. The above products have also been recognized as reaching the international leading standard by the Ministry of Science
and Technology and the Technical Committee for Standardization of Power Industry Thermal Automation.
The guiding thought for production of the company is “to provide maintenance free products for users” and produce world top class
products based on product performance and reliability using world’s best raw materials and high performance and reliability production
technology. For instance, in the production of sheathed conductors and sheathed thermocouples, the multiple high vacuum annealing and
argon filling process is adopted and extremely strict industrial hygiene measures are applied to various operation procedures.
The products are widely applied in power, metallurgical, petrochemical and other industries. Especially regarding large thermal power
generating units and hydroelectric generating units (including pumped storage units) in the power system, the products have already
replaced imported equipment on the units that are introduced from abroad on a large scale due to the better quality.
公司主要产品有：Main products include:
I. High temperature high pressure fully sheathed thermocouple (RTD)
It is applicable to measure and control the temperature of high temperature high pressure fluid in the power, metallurgical and
petrochemical industries. And it features with high accuracy, good stability, resistance to high temperature and pressure, resistance to wear,
no leakage and shock resistance.
II. Universal fully sheathed thermocouple (RTD) with protective casing
It is applicable to the measuring and control of fluid of intermediate temperature and pressure and below in the power, metallurgical and
petrochemical industries. And it is characterized by high accuracy, good stability, resistance to wear, no leakage and shock resistance.
III. Fully sheathed thermocouple (RTD) for measuring metal wall temperature (thermocouple)
It is applicable to monitoring and measuring of metal wall temperature of mechanical equipment, pipes and containers in the power,
metallurgical, petrochemical and mechanical industries. And it features with high accuracy, good stability, shock resistance and quick
IV. Fully sheathed thermocouple (RTD) for bearing bush (bearing)
It is applicable to monitoring and measuring of temperature of various bearing bushes (bearings). And it has the features of impact
resistance, shock resistance, high accuracy, good stability, quick response, no leakage of sealing parts and no oil leakage.
V. RTD (thermocouple) for electric machinery
It is applicable to monitoring of temperature of coil, iron core and cooling media of various kinds of electric machinery such as generators
and motors. And it has the features of impact resistance, shock resistance, high accuracy, good stability, quick response, and anti-
VI. High temperature high pressure rapid thermocouple (RTD) – hydrophobic probe
It is applicable to rapid measuring of high temperature, high pressure fluid media in the power, metallurgical and petrochemical industries
and is characterized by quick response (τ0.5≤3S) and excellent reliability. It is especially suitable to the steam turbine anti-water protection
and boiler spray type desuperheating quick adjustment system because it can solve the problem of slow response and poor adjustment quality of such systems.
All these products are of world leading quality and long service life and the quality warranty period is more than eight years. It can be guaranteed that the elements are free from damage and maintenance during two overhaul periods or a longer period of time.
VII. TR series large rotary machinery rotor multi-position online finish turning and honing system
In order to meet the need of on-site and online maintenance of power generation plants and large and medium steamships, the company
has also developed TR system large rotary machinery rotor multi-position online finish turning and honing system and obtained
international patents (patent No. HK1120985). The system can be used for online finish turning and honing of rotor journals of large rotary
machinery, generator collecting rings, thrust plates of steam turbines, coupling and grounding carbon brush axial surfaces, with machining
precision and polish degree meeting or exceeding the factory accuracy of such equipment and reaching then international standards. This
machining method can be applied on site and most equipment can be processed on the line, e.g. the machining can be conducted, and
there is no need to taking off the lid of turbine cylinder, taking out the rotor of the generator rotor or dock a ship when repair them, thus to
save substantial transport cost, reduce the risk and win valuable time.
Yuguang Company is a hi-tech industrial company which always regards technological progress as the power for its development and
places the cultivation of hi-tech talents and development of hi-tech products in the first place. The engineering and technical personnel
have developed a number of urgently needed hi-tech products and applied for many patents, winning the applause of the users and awards
from the government. Liaoning Science and Technology Commission and Patent Office have recognized Yuguang Company as a Provincial
Patent Advanced Collective and an Advanced Enterprise and Shenyang Municipal Government has granted the company the honorable title
of Star Scientific Research Institute and the first prize for creation and invention.
Apart from R&D of hi-tech products, Yuguang Company has also cultivated a top-notch technical team. The technical personnel mainly
come from famous universities, research institutes and large enterprises in China and have solid theoretical basis and rich practical
experience, as the outstanding in the industry of China. They have made great contributions to the product development and technological
progress of our company.
Yuguang Company values very much the absorption and application of new process and technology and modern management technology
and has successively sent engineering technicians and managerial personnel to investigate and study in foreign countries such as the US,
Germany and Norway for the purpose of bringing in technology and cooperative production, by which the technology and management
have been raised to a new level.
Yuguang Company has cooperated with ABB and Statoil ASA, and, by drawing lessons from their advanced management experience and
quality assurance measures, in combination with the features of our products, has established a quality assurance system of our own. Due to
the adoption of the international standards, our products have been recognized as maintenance free products with excellent performance.
Therefore, we have has won a number of quality management awards.
Yuguang Company is mainly engaged in R&D and production of temperature measuring primary instruments and elements of fully
sheathed thermocouples and fully sheathed RTDs (please see the above introduction for details). Over the past thirty years, our products
have been successfully applied in more than a hundred large, medium and small thermal power plants in China, as well as in some exported
units, winning the applause of the users.
In addition, our company has developed the large rotary machinery online finish turning and honing system which has been successfully
applied in nearly fifty units, ensuring their long-term stable operation.
Chairman, general manager, chief engineer, as well as technical quality department, production department, administration office, operation
department, production workshop under them. Various types of management personnel and engineering technicians including senior and
intermediate management and professional technicians, excellent technical workers and management personnel.
The strength of the Company: the company has a registered capital of RMB 3 million yuan, a premise of nearly 2000m2 including office
buildings, workshop and production site, sophisticated fully sheathed thermocouple and RTD production lines such as sheathed element