Quality Management Certification

Quality-oriented, we pursue 100% quality requirements, which depends on our high standards of quality management systems, including a high degree of customer focus, process approach and continuous improvement. All systems and processes are rigorously tested and certified. Our ISO9001:2008 certification is the most effective proof of this quality management system.

Numerous certificates prove that our products are trustworthy. 

Yutong Instrument passed ISO9001:2008 quality management system certification in April 2010.Chongqing Yutong Company adheres to the quality policy of “Technology as the guide, quality as the basis, continuous improvement and customer satisfaction.” Through the international leading automated production equipment, perfecting the precise process control level and strict and meticulous process quality management methods. Fully guarantee the quality requirements of the products.


Yutong Company hosted or participated in the development of national standards for safety barriers/isolators/temperature transmitters.
The products produced by our company are designed, produced and manufactured according to the requirements of national/industry standards.


Persevering in innovation and continuously promoting technological progress. So far, Yutong Instrument has more than 20 national technology patents.


Yutong Instrument's products comply with EU safety regulations and pass the EU CE certification.


Yutong Instrument obtained the national industrial product production license for explosion-proof electrical products. It shows that our company's capabilities and conditions in quality control, production capacity, equipment level, technology research and development are in line with the production requirements of national explosion-proof electrical products. 


Yutong Instrument's explosion-proof electrical products--safety barrier products have passed the inspection of China National Explosion-proof Electrical Products Quality Supervision and Inspection Center (CQST), and obtained the explosion-proof electrical equipment explosion-proof certificate.Certification standards:
GB3836.1-2010 Explosive atmosphere - Part 1: Equipment - General requirementsExplosive atmospheres - Part 4: Intrinsically safe "i" protective equipmentDDZ-III series electric unit combination meter: safety barrier


European explosion-proof products ATEX certification. ATEX is a standard directive named after "Atmosphere Explosive". It is the specification of the explosion-proof product and the specification of the operation. Only use explosion-proof products with ATEX certification, can be produced, manufactured, sold in the EU countries and used in flammable and explosive hazardous areas.Certification standards:  
EN60079-0:2009 Explosive atmospheres - Part 0: Equipment - General requirementsEN60079-11:2006 Explosive atmospheres - Part 11: Intrinsically safe "i" protective equipment


For functionally safe devices, the performance meets the requirements of safety functions. The function of functional safety is to reduce the risk of dangerous events to an acceptable level, so as to ensure that the controlled equipment is in a safe state within a specified period of time.SIL certification is based on IEC61508, IEC61511, IEC61513 and other standards to evaluate, verify and certify the safety integrity level (SIL) or performance level (PL) of safety equipment.
SIL certification is divided into 4 levels, SIL1/SIL2/SIL3/SIL4, including two levels of product and system. Among them, SIL4 is the highest level.
Certification standards:
IEC61508:2010 Functional safety of electrical/electronic/programmable electronic safety related systems.