QUALITY CONTROL

Strict quality inspection from materials to final testing, ensuring safe and reliable SF6 equipment.

CUSTOM ENGINEERING

Professional engineering team supporting OEM/ODM customization for SF6 handling, gas recovery and testing applications.

MANUFACTURING

Modern production workshop with standardized assembly process, ensuring stable quality and fast delivery worldwide.

GLOBAL SUPPORT

Responsive technical support and export experience for customers across power utilities, GIS manufacturers and service companies.

WHO WE ARE & WHY CHOOSE US

China high quality SF6 Recovery System & SF6 Gas Tester suppliers

Shanghai Yushi Technology Development Co., Ltd.

Company Profile About KSTONE KSTONE is a professional manufacturer specializing in SF6 testing instruments, gas handling equipment, and eco-friendly gas solutions for the global power industry. With over 13 years of professional experience, KSTONE has become one of the leading manufacturers in China with one of the most complete product ranges in the SF6 industry. We provide reliable equipment and ...

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Introduction

SF6 leak detector, dew point meter, comprehensive testing instrument, recovery vacuum separation and purification device

Service

Customized Professional Project Solutions, Supply of High-quality Equipment, Efficient On-site Commissioning, and Comprehensive After-sales Maintenance Support

History

13-Year Expert SF₆ Testing Equipment Manufacturer (China) Full product line | 1,000+ global clients | ISO9001 & national high-tech certified Standard-setting participant (national/industry/group levels) State Grid recommended supplier | Dual industry association member Products: SF₆/C₄F₇N gas detectors, recovery/purification/filling devices

Our Team

A 20-person technical R&D team, comprising senior engineers with 8+ years of experience, drives product iteration and technology exploration. Operating across hardware, software, and testing groups, the team allocates 30% of resources to upgrading existing products—like improving SF6 analyzer accuracy by 15%—and 70% to new projects such as next-gen fluorine gas sensors and AI analysis systems.

SHEMAR Electric Expands Global Insulation Manufacturing with Advanced SF₆ and C4F7N Gas Handling Solutions

SHEMAR POWER Expands Global Insulation Manufacturing with Advanced SF₆ and C4F7N Gas Handling Solutions SHEMAR POWER is recognized as one of the world’s leading suppliers of composite insulation products for high-voltage power transmission systems. As global demand for reliable power infrastructure ...

Shanghai Yushi Conducted SF6/N2 Gas Mixing System Training and Commissioning at Guodian Bona

Shanghai Yushi Conducted SF6/N2 Gas Mixing System Training and Commissioning at Guodian Bona Professional SF6 Gas Handling Training, Leak Detection Demonstration and GIS Equipment Commissioning On May 25, Shanghai Yushi successfully conducted professional technical training and on-site commissioning ...

Kstone Conducts Technical Exchange and On-site Guidance at Zhenggang Instrument Transformer

Kstone Conducts Technical Exchange and On-site Guidance at Zhenggang Instrument Transformer Recently, the technical director and general manager of Shanghai Yushi Technology Development Co., Ltd. (Kstone) visited Zhenggang Instrument Transformer to conduct technical exchange and on-site guidance ...