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 technical solutions for GIS manufacturers, switchgear companies, electrical utilities, high-voltage testing organizations, and industrial maintenance service providers worldwide.

Today, KSTONE products serve more than 1000 customers across global markets.

Our main products include:

• SF6 Leak Detectors
• SF6 Dew Point Meters
• SF6 Comprehensive Testing Instruments
• SF6 Recovery, Vacuum, Separation & Purification Systems
• SF6 Mixed Gas Filling Devices
• Density Relay Calibration Equipment
• Vacuum Pumping Systems
• C4F7N Gas Instruments & Equipment
• Eco-Friendly Gas Handling Solutions

All products are designed for industrial applications in GIS, switchgear, and power equipment maintenance.

KSTONE has obtained:

• ISO9001 Quality Management System Certification
• National High-Tech Enterprise Certification
• Specialized & Innovative Enterprise Certification
• National Technology-Based SME Certification
• Double Soft Certification Enterprise

These recognitions reflect our continuous investment in technology, product development, and manufacturing quality.

KSTONE actively participates in the development and revision of national and industry technical standards for SF6 and environmentally friendly gas technologies.

• GB/T11023-2018
  High Voltage Switchgear — SF6 Gas Sealing Test Method

• DL/T1366-2023
  Sulfur Hexafluoride Gas for Power Equipment
• DL/T2756-2024
  Guidelines for Detection and Recovery of Sulfur Hexafluoride and Its Mixtures for Electrical Equipment
• DL/T1353-2024
  Technical Specification Standard for Sulfur Hexafluoride Treatment Systems

• Technical Specification Standard for Perfluoroisobutyronitrile (C4F7N) Gas Replenishment Devices

• Recommended Manufacturer of SF6 Mixed Gas GIS Tools for State Grid Corporation of China (2022 No.290)
• Member of China Electrical Equipment Industry Association
• Member of China Fluorosilicon Organic Materials Industry Association

Trusted By / Our Customers

Supporting global customers in power transmission and gas handling applications.

KSTONE is committed to providing reliable, efficient, and environmentally responsible gas handling solutions for the global power industry.

We continue to focus on SF6 management technologies and next-generation eco-friendly gas applications to support safer and greener electrical systems worldwide.