SF6 Leak Detector | Detailed introduction of technical principles

The core principle of an SF6 gas leak detector is to detect and locate minute leaks of SF6 gas in the environment using a high-sensitivity sensor. This is based on negative corona discharge or infrared absorption technology.

The most common principle is negative corona discharge: The instrument's probe contains high-voltage electrodes that create a high electric field at the tip, ionizing air molecules and generating a stable "corona discharge" that forms a small discharge current. When the probe draws in air containing SF6 gas, the SF6 molecules, with their strong electronegativity, "capture" free electrons, significantly suppressing the intensity of the corona discharge and reducing the discharge current. The higher the concentration of leaked SF6 gas, the more significant the current drop. The instrument detects and amplifies this current change through precision circuitry, converting it into an audible (beep frequency change) and visual (concentration value display) leak signal, thus achieving highly sensitive, qualitative, and semi-quantitative leak location. SF6 Leak Detector, SF6 Leak Detector/Gas Leak Detector, Gas Leak Detector 0-1500PPmv

1. Capable of qualitative and quantitative detection of leaks in SF₆ electrical equipment.

2. Accurately locates leak points in SF₆ gas electrical equipment.

3. Simultaneously displays multiple parameters including SF₆ concentration, temperature and humidity, battery status, time, and diaphragm pump status.

4. Employs non-dispersive infrared (NDIR) technology and a world-leading German-made sensor.

5. Fast testing speed; data stabilizes within 10 seconds with excellent repeatability.

6. Includes temperature and pressure compensation, perfectly compensating for gas concentrations under different temperature and pressure conditions.

7. SF₆ gas-only response; does not respond to any other gas, eliminating false alarms.

8. Non-contact gas measurement ensures no sensor poisoning at any concentration.

9. Sensor constant temperature chamber ensures no temperature drift under any ambient temperature.

10. Adheres to European design principles of simplicity and low power consumption; optimized hardware and software; built-in lithium battery for extended standby time.

11. Operators can wear it while working at heights during on-site testing.

12. Improved the previous model's color screen, which was difficult to see in sunlight, making it more suitable for on-site personnel.

13. Segmented audible and visual alarms ensure that on-site operators can detect leaks without needing to view data.

1. Measurement Principle: Non-dispersive infrared, dual-wavelength principle

2. Detection Range: 0-1500ppm

3. Detection Resolution: 0.1PPmv

4. Detection Range: 0-1500PPmv

5. Detection Accuracy: ±2%FS (0-1000ppm)

6. Repeatability Error: ≤±1%

7. Sensitivity Limit: 0.1PPmv

8. Detection Response Time: ≤10 seconds

9. Detection Recovery Time: ≤15 seconds

10. Long-Term Stability (Span): ≤±20ppm, exceeding 1000 hours

11. Long-Term Stability (Zero): ≤±20ppm, exceeding 1000 hours

12. Sampling Method: Pump-suction, flow rate up to 1L/min

13. Zero Drift: ≤±1% (F, S years)

14. Linearity Error: ≤±1%

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