The sulfur hexafluoride gas detector can be used for leak detection of electrical equipment such as high-voltage switches and transformers in the power industry, as well as for monitoring production processes, laboratory research, and emergency response in various occasions. It has a wide range of application fields.

The basic working principle of sulfur hexafluoride gas detector:

1. Principle of electrochemical sensor: When sulfur hexafluoride gas comes into contact with the sensor, a specific electrochemical reaction occurs, generating current or voltage signals. The current or voltage changes caused by this reaction are directly proportional to the gas concentration. The instrument detects this signal and converts it into a concentration value to determine whether the concentration of SF6 gas exceeds the standard. This method has a fast response speed and is suitable for rapid detection.

2. Principle of infrared absorption technology: Utilizing the strong absorption characteristics of SF6 molecules at a wavelength of 10.55 microns, infrared light is allowed to pass through the tested gas sample, and then the degree of attenuation of the transmitted light intensity is measured. Calculate the gas concentration based on principles such as Lambert Beer's law. This technology has strong anti-interference ability and is suitable for high humidity and complex industrial environments, but requires regular calibration to address signal saturation issues.

Precautions for using sulfur hexafluoride gas detector:

1. Safety protection measures

-Avoid direct contact: Sulfur hexafluoride is highly toxic, and protective equipment (such as gloves and goggles) should be worn during operation. If it accidentally comes into contact with the skin or eyes, immediately rinse with water and seek medical attention.

-Prevent inhalation of gas: Due to its density being about 5 times that of air and its tendency to accumulate in low-lying areas, it is necessary to ensure good ventilation in the working environment and use respiratory protective equipment if necessary.

2. Sampling point selection and environmental monitoring

-Reasonably locate sampling points: effectively capture potential leaked SF6 gas; At the same time, cooperate with oxygen transmitters to monitor changes in oxygen concentration in the environment and prevent the risk of hypoxia.

-Control detection duration: The probe should not be exposed to high concentration SF6 for a long time, otherwise it may cause sensor saturation or damage. Once a full scale alarm occurs, it should be quickly moved to a clean area and allowed to recover before continuing to be used.

3. Instrument maintenance and standardized operation

-Regularly flush the gas circuit: After completing the inspection, the pipeline can be flushed with an air pump for 3 minutes to avoid residual gas affecting the accuracy of the next measurement.

-Follow the instructions: strictly follow the instructions in the product manual, especially when dealing with decomposition products such as HF and SO? ）When malfunctioning equipment, it is necessary to wear a gas mask and protective clothing.

4. Response to special scenarios

-Emergency response for large-scale leaks: In the event of a large-scale leak, personnel should evacuate to 10 meters away from the leak point and wait for sealing measures to be taken before entering the area.

-Humidity sensitivity management: For precision equipment such as circuit breakers, it is necessary to strictly control the moisture content of the gas filled (new gas ≤ 8ppm, during operation ≤ 150ppm) to prevent insulation performance degradation and corrosion risks.