About Wenzhou Zhengyuan Electronics Co., Ltd.
A high-tech manufacturer of electrical measuring tools in Wenzhou — China's electrical hardware capital.
Our Factory
Founded in 2008 and now 18 years strong, Wenzhou Zhengyuan Electronics Co., Ltd. (brand CHINYOO) is a high-tech enterprise focused on the R&D, production and sales of electrical measuring tools — from digital multimeters to high-precision smart voltage testers. With specialized production, automated manufacturing, rigorous quality control and continuous innovation, we have become a leading voltage tester and multimeter manufacturer, exporting across Europe, Southeast Asia, South America and other global markets.
We welcome OEM & ODM projects: custom logos, custom ranges, custom colors, custom packaging and flexible MOQ.
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Quality Control
From raw materials to finished goods, every unit passes 12 inspection steps to ensure stable performance and precise readings.
Every unit goes through 12 inspection steps from incoming materials to finished goods — stable performance and accurate readings on every product.
High-precision automated lines and smart testing equipment give precise control over key processes.
Annual capacity of one million units, built on automated manufacturing, keeps delivery fast and consistent.
Certifications
All products are CE (EMC and LVD) certified and RoHS compliant, verified by DTI (Deesev Testing) per IEC 62321, produced in our ISO 9001-certified factory.
CEEU Conformity
EMCElectromagnetic Compatibility
LVDLow Voltage Directive
RoHS DoCDTI EE180805 — Voltage Tester 1805D series
RoHS ReportDTI EE180805 — Voltage Tester 1805D series
RoHS DoCDTI EE190805R — Voltage Tester VD06 series
RoHS ReportDTI EE190805R — Voltage Tester VD06 series
FCCFCC Certification
Battery DirectivesCE & US Battery Compliance
R&D & Innovation
Multiple national patents — including invention patents — cover circuit design, structure design and functional innovation, keeping our core technology self-owned.
A dedicated R&D center with senior engineers delivers custom solutions and launches 5+ new products every year.
We work with universities and research institutes to stay at the frontier of measurement technology.
Global Markets & Service
Our instruments serve well-known electrical brands and channel partners across Europe, Southeast Asia and South America. As an OEM/ODM source factory operating since 2008, we run an annual capacity of one million units and support bulk orders and rush delivery.
Flexible cooperation models with fast response to orders — your logo, your range, your packaging, your market.
A localized after-sales network answers customer requests quickly and keeps supply chains moving.
Continuous value through technology upgrades and cost optimization.
Dedicated to Measurement · Building the Future
We will keep focusing on electrical measurement — technology as the engine, quality as the foundation — to become a globally trusted provider of electrical tool solutions. Every measurement, precise and reliable.
Visit Us
Building 6, No.1 Hongjin Road, Daizhai Village, Tengqiao Town, Lucheng District, Wenzhou, Zhejiang, China
Work With Our Factory
Get our full catalog, pricelist and MOQ details.