Industrial Manufacturing

Transformer Monitoring & Temperature Control Solutions

Winding temperature indicators, top-oil temperature indicators, oil level monitoring and transformer monitoring solutions for power transformers, substations and retrofit projects.

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Factory Production

Built for Transformer Monitoring Applications

Designed for transformer manufacturers, substations, utility projects and retrofit applications.

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Technology Innovation

Engineering-Driven Product Development

From temperature indication to oil level and online monitoring, our products are developed for reliable field performance.

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Equipment Testing

Factory Testing for Reliable Delivery

Routine inspection and testing procedures support consistent product quality and dependable delivery.

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Quality Control

Support for International Projects

We support overseas customers with technical documents, project coordination and responsive commercial communication.

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ZPro Factory

About Us

Dalian Zhonghe Optoelectronics Technology Co., Ltd.

Located in Dalian Jinzhou New Area, we are a technology enterprise dedicated to the R&D, production and service of large power transformer monitoring and protection devices. Our products are widely used in major domestic UHV bureaus, power supply companies, and transformer factories, and exported to more than ten countries including the United States, Russia, Spain, France, Vietnam, and Myanmar.

We have an innovative R&D team with rich professional knowledge and practical experience in power monitoring and protection. We adhere to independent innovation and own dozens of national patents. ISO9001 certified in 2012, recognized as a high-tech enterprise in 2018, and certified for intellectual property management in 2019.

Products

Core Products

As a main drafter of industry standards, we provide advanced power transformer monitoring and protection solutions.

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BWR-04 / BWR-06 Transformer Winding Temperature Controller with 4-20mA Output

BWR-04 / BWR-06 Transformer Winding Temperature Controller with 4-20mA Output

The BWR-04 / BWR-06 Series Transformer Winding Temperature Controller is designed for oil-immersed transformer winding temperature monitoring, indication and control. It supports 4-20mA remote signal output, alarm control, cooling fan control, trip protection and remote monitoring. It is suitable for power transformers, substations, power distribution systems and industrial electrical equipment.
BWY-804 / BWY-806 Transformer Oil Temperature Controller with Pt100 and 4-20mA Output

BWY-804 / BWY-806 Transformer Oil Temperature Controller with Pt100 and 4-20mA Output

The BWY-804 / BWY-806 Transformer Oil Temperature Controller is designed for oil temperature monitoring, indication and control of oil-immersed transformers. It supports Pt100 resistance signal output, DC 4-20mA current signal output, alarm control, cooling system control and remote monitoring for power transformers, substations and power distribution systems.
BWR2-04 / BWR2-06 Type II Transformer Winding Temperature Controller with Pt100 and 4-20mA Output

BWR2-04 / BWR2-06 Type II Transformer Winding Temperature Controller with Pt100 and 4-20mA Output

The BWR2-04 / BWR2-06 Type II Transformer Winding Temperature Controller is designed for oil-immersed transformer winding temperature monitoring, indication and control. It can be used with the BL-F composite transmitter, supports Pt100 resistance signal output, and can be connected with the TC-152 temperature transmitter to provide 4-20mA current signal output for remote monitoring, alarm control, cooling fan control and transformer protection applications.
BWY2-804 / BWY2-806 Type II Transformer Oil Temperature Controller with Pt100 and 4-20mA Output

BWY2-804 / BWY2-806 Type II Transformer Oil Temperature Controller with Pt100 and 4-20mA Output

The BWY2-804 / BWY2-806 Type II Transformer Oil Temperature Controller is designed for oil temperature monitoring, indication and control of oil-immersed transformers. It supports Pt100 resistance signal output and can be connected with the TC-152 temperature transmitter to provide 4-20mA current signal output for remote monitoring, alarm control, cooling system control and transformer protection applications.
BWY2-804 / BWY2-806 Type II Transformer Oil Temperature Controller with BL-FC Oil Temperature Composite Sensor, Pt100 and 4-20mA Output

BWY2-804 / BWY2-806 Type II Transformer Oil Temperature Controller with BL-FC Oil Temperature Composite Sensor, Pt100 and 4-20mA Output

The BWY2-804 / BWY2-806 Type II Transformer Oil Temperature Controller is designed for oil temperature monitoring, indication and control of oil-immersed transformers. It supports Pt100 resistance signal output and can be connected with the TC-152 temperature transmitter to provide 4-20mA current signal output. The product can also be used with the BL-FC oil temperature composite sensor according to project requirements.

Our Advantages

Company Advantages

Industry expertise and technical capabilities for transformer monitoring solutions.

Controlled Manufacturing and Testing

Routine inspection and testing procedures help ensure stable performance and reliable delivery.

Project-Based Support

We support model selection, technical clarification and project coordination for different transformer applications.

Standards and Technical Documentation

Product development and quality control are supported by industry standards, technical documents and test records.