The KST-III Intelligent Dew Point Tester is a portable high-precision moisture analyzer designed for measuring trace water vapor content in SF₆ gas insulated electrical equipment. The instrument is widely used in GIS substations, circuit breakers, transformers, gas-insulated transmission lines (GIL), and other high-voltage equipment during commissioning, maintenance, and routine inspections.

Featuring advanced dew point sensing technology, the KST-III delivers rapid and reliable moisture measurements with minimal gas consumption. Its compact design, large-capacity data storage, rechargeable lithium battery, and user-friendly interface make it an ideal solution for field engineers and utility maintenance teams.

• Fast Measurement: No warm-up time required. Measurements can begin immediately after power-on, providing quick and accurate dew point readings.
• Portable Design: Lightweight and compact construction allows easy transportation and field operation.
• Low Gas Consumption: Consumes only approximately 2 liters of gas per measurement, reducing SF₆ gas loss and operating costs.
• Imported Self-Locking Couplings: Equipped with original German self-locking connectors to ensure safe operation and leak-free gas connections.
• Large Data Storage: Stores up to 500 groups of measurement records for convenient data management and historical analysis.
• Comprehensive Display: Large LCD screen simultaneously displays dew point, moisture content (ppm), ambient temperature, ambient humidity, date and time, and battery status.
• RS232 Communication Interface: Supports connection with serial printers for direct report printing and data output.
• Long Battery Life: Built-in 4Ah rechargeable lithium battery provides over 20 hours of continuous operation after a full charge.

• SF₆ Gas Insulated Switchgear (GIS)
• Gas Insulated Transmission Lines (GIL)
• High Voltage Circuit Breakers
• Power Transformers
• SF₆ Gas Recovery Systems
• Electrical Utility Maintenance
• GIS Commissioning Projects
• SF₆ Gas Quality Inspection
• Preventive Maintenance Programs
• Substation Testing Laboratories

KSTONE specializes in the development and manufacturing of SF₆ gas testing and handling equipment for the power transmission and distribution industry.

• More than 20 years of industry experience
• Complete SF₆ gas analysis product line
• Exported to over 50 countries and regions
• Professional technical support and training
• Customized solutions for utilities and EPC contractors
• Reliable products widely used in GIS commissioning projects worldwide

The KST-III measures moisture content in SF₆ gas and displays results in both dew point temperature and ppm values.

Excessive moisture can reduce insulation performance and accelerate equipment aging. Regular dew point testing helps maintain safe and reliable operation.

The instrument typically completes a measurement within 3 minutes under standard conditions.

The KST-III consumes only about 2 liters of gas per test, minimizing SF₆ gas loss.

Yes. The tester can store up to 500 measurement records for future reference and reporting.

Yes. Its lightweight design, rechargeable battery, and rugged construction make it ideal for on-site GIS maintenance and commissioning.

Yes. The RS232 communication interface allows connection to compatible serial printers for report generation.

Absolutely. The KST-III is widely used during GIS installation, commissioning, maintenance, and periodic inspections.