High-Sensitivity SF6 Leak Detectors | Corona, Infrared & Ionization Principles | KSTONE

December 22, 2025
Principle of SF6 Leak Detector
  1. Corona Discharge Principle

    Represented by models such as XP-1A, SMART-01B and DILO 3-033-R002, this type of detector features a leak detection sensitivity of 3g/year and fast response speed. Its drawback is that the sensor has a service life of only 20 hours, and the sensitivity will gradually decrease with prolonged uselatest company news about High-Sensitivity SF6 Leak Detectors | Corona, Infrared & Ionization Principles | KSTONE  0

    latest company news about High-Sensitivity SF6 Leak Detectors | Corona, Infrared & Ionization Principles | KSTONE  1latest company news about High-Sensitivity SF6 Leak Detectors | Corona, Infrared & Ionization Principles | KSTONE  2

                                 XP-1A                                              SMART-01B

2. Infrared Detection Principle

It can be divided into infrared principles using discrete components or tube-type structures, with an actual maximum sensitivity of up to 1 ppm. The tube-type infrared dual-wavelength principle offers better linearity and higher stability.

Infrared detectors based on discrete components can be categorized into qualitative and quantitative types:

    • Qualitative type: Represented by models such as SMART-200-FR and INFICON D-TEK (adopting discrete infrared sensors). 
      • Quantitative type: Represented by KSTONE LF-01-FR.

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                                                                        Tube-type Infrared Sensor

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                        SMART-200-FR                                                        LF-01-FR

3. High-Frequency Magnetic Field & Low-Voltage Ionization Principle

Leak detectors developed based on this principle boast three key advantages: ultra-high sensitivity, rapid response speed, and zero sensor wear.

The sensitivity can reach 0.01 ppm, the response time is less than 1 second, and the sensor service life is as long as 10 years.

Main models include LF-1D+, LF-200, LF-300, LF-302, etc.

  • For indoor factory leak location, we recommend the cost-effective LF-1D+.
  • For on-site leak detection, we recommend the premium model LF-200.
  • For annual leak rate calculation using the wrapping method, we recommend the optimal models LF-300, LF-302 or LF-303.

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                         LF-1D+                                                             LF-200

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                            LF-300                                                 LF-302

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                            LF-303