About - sunyuansz

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Innovating Since 2002

Company Overview

Founded in Shenzhen in 2002, Sunyuan Technology specializes in the R&D and manufacturing of precision analog signal modules, including signal isolators, isolated amplifiers, smart sensors, DC-DC converters, and digital panel meters.

Our products are widely used in industrial automation, rail transit, renewable energy, medical equipment, instrumentation, robotics, and other demanding applications. Backed by patented technology, certified manufacturing, and years of OEM/ODM experience, we provide reliable alternatives to imported industrial modules with faster response and flexible customization.

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Quality Certification

Multi‑stage industrial‑grade testing from incoming materials to final shipment

After-Sales Service & Quality Assurance

As an industrial manufacturer specializing in the R&D and production of isolation amplifiers, power modules, data acquisition devices, and digital panel meters, we understand the critical importance of product stability and safety in industrial applications.

To ensure consistently high reliability, we have established a rigorous quality control and responsive after-sales service system covering the entire product lifecycle.

From product development and manufacturing to delivery and after-sales support, every stage is carefully controlled to provide our customers with high-reliability products and professional services.

Rigorous Industrial-Grade Quality Control,Multi-Level

Inspection for Zero-Defect Delivery

To meet the demanding environmental requirements of industrial electronic components, instrumentation, and measuring devices, we implement rigorous quality control procedures that exceed industry standards

Incoming Quality Control

100% of critical components—including core ICs, isolation components, transformers, and other key materials—are sourced from reputable brands and selected from industrial-grade products.
Before being accepted into inventory, all incoming components undergo electrical parameter sampling tests, dielectric withstand voltage tests, and solderability inspections to prevent substandard components from entering the production line.

In-Process Quality Control

Standardized SMT Assembly Processes Ensure full, uniform solder joints and prevent cold solder joints, insufficient soldering, and other soldering defects.
Conformal Coating & Encapsulation Processes.Isolation amplifiers and power modules undergo professional encapsulation and conformal coating processes to provide reliable protection against moisture, dust, and vibration, ensuring stable operation in demanding industrial environments.

100% Final Inspection

High-Voltage Isolation & Insulation Testing. Isolation amplifiers and power modules undergo 100% dielectric withstand voltage testing, such as a 3,000 VDC / 60 s isolation withstand test, to ensure reliable electrical isolation and insulation performance.

Quality Traceability

Each device/module is assigned a unique serial number (S/N), enabling full traceability of production records, test data, and responsible personnel throughout the entire manufacturing process.

Industrial-Grade After-Sales Support:Fast, Professional

Service to Ensure Continuous System Operation

To minimize the risk of industrial control system downtime caused by hardware failures, we provide professional and responsive technical support and comprehensive after-sales service

Service Commitment

Warranty Service:All isolation amplifiers, power modules, data acquisition devices, and digital panel meters are covered by a [X]-year free warranty.

Fast Replacement & Spare Parts Support:For standardized modules that experience non-user-induced failures during the warranty period, we provide direct replacement or priority spare parts shipment, minimizing on-site downtime and helping ensure continuous system operation.

Lifetime Maintenance & Support:After the warranty period, we provide cost-based repair services, along with long-term product upgrades and technical support, to ensure continued and reliable operation throughout the product lifecycle.

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Technical Support Team

Dedicated Engineer Support:Senior Field Application Engineers (FAEs) provide one-on-one technical support, helping customers troubleshoot practical on-site issues such as wiring, electromagnetic interference, signal attenuation, and other application-related challenges.

Rapid Response:We provide 24/7 technical support, with after-sales inquiries responded to within 15 minutes and a clear solution provided within 2 hours.

Customization & Technical Guidance

We provide free product selection guidance, pin definition verification, wiring diagrams, and communication protocol integration support for data acquisition devices, including Modbus, RS485, and other protocols.