Background:

The SF6 sensor uses the NDIR principle to detect. Through the infrared light source, it has quick and sensitive response, strong anti-interference ability and long life. High precision, high repeatability and high stability. The sulfur hexafluoride sensor is a sensor specially designed for monitoring sulfur hexafluoride. The concentration of sulfur hexafluoride can be effectively monitored. And when the limit is exceeded, it will alarm in time to remind people to avoid harm. The SF6 sensor mainly detects the SF6 gas content in the ambient air. When the SF6 gas content in the environment exceeds the standard, it can give a real-time alarm. It can be widely used in high-voltage switch distribution rooms of power plants, substations and high-voltage switch production workshops to monitor the concentration of sulfur hexafluoride gas. Let's talk about the application and detection of SF6 sensor in the power industry.

Properties of Sulfur Hexafluoride:

Pure sulfur hexafluoride SF6 is a colorless, odorless, non-toxic and non-flammable inert gas at normal temperature and pressure. The density is 5 times that of air, and the actual heat dissipation capacity is better than that of air. Strong electronegativity (electron affinity is 3.4eV, and its molecules have a strong ability to absorb free electrons to form negative ions. Therefore, it hinders the formation and development of discharge, so it has high dielectric strength). SF6 has no corrosive effect on metals and insulating materials, and has excellent thermal stability. It is not easy to be decomposed. The decomposition of SF6 gas at high temperature requires a lot of energy, so it has a strong cooling effect on the arc. The arc extinguishing ability of SF6 gas is more than 100 times that of air, and its decomposition gas has strong dielectric strength).

Why does electricity need sulfur hexafluoride testing equipment:

Due to these advantages of SF6 gas, SF6 circuit breakers completely replace traditional oil switches. SF6 current transformers and voltage transformers have also gained rapid promotion and application. SF6 equipment is small, reliable and stable. But the leakage of SF6 gas is one of the major accidents in the power industry. Under normal circumstances, the concentration of moisture in the atmosphere is dozens of times that in the SF6 gas chamber. In areas with relatively high humidity in the south, the difference in water concentration may reach hundreds of times. Therefore, the huge concentration difference between inside and outside makes the water infiltrate into the SF6 gas chamber as soon as it has a chance, causing the micro-water to rise sharply. Moisture will react with SF6 gas under the action of arc and high temperature. Moisture is the main contributor to corrosiveness and toxicity.

In addition, because SF6 is heavier than air. Once a leak occurs, it will basically run to the bottom. It is easy to cause various injuries to the staff. It seems that the leakage of SF6 is inevitable. The key is how to issue early warning when the leak exceeds an acceptable safety level. Therefore, there are many parameters to be tested around SF6 in the power industry. Purity detection (detect the density change of SF6 gas. The density value is expressed by the pressure of SF6 gas at 20), leak detection and decomposition detection are the main three directions. SF6 has strong infrared absorption properties.

NDIR Modules Detect SF6 Gas：

Jingxun's SF6 gas sensor module adopts non-dispersive infrared technology. It has high sensitivity and high resolution. Anaerobic dependence, stable signal. Accurate measurement, low power consumption and long service life. SF6 gas sensor modules are available in diffusion type and pump type, which can be selected according to requirements. After the infrared radiation emitted by the infrared light source is absorbed by a certain concentration of the measured gas, the spectral intensity proportional to the gas concentration will change. The concentration of the measured gas can be retrieved by calculating the change in spectral intensity. Adopt NDIR principle, combine advanced optical path, precision circuit and intelligent software. A general-purpose infrared SF6 sensor is formed. Effective gas monitoring.

Jingxun Unblocked Explosion-proof Sulfur Hexafluoride Sensor：

Fixed gas detector with stable performance, sensitive and reliable. With high-precision liquid crystal display, explosion-proof housing, diffusion or pump suction. SF6 gas detector has the characteristics of flexible use and simple operation. SF6 gas detector is suitable for various gas leakage places, such as: city gas, petroleum, chemical, pharmaceutical, steel, special industrial plants and other fields. The explosion-proof grade of the SF6 gas detector is CT6. Alarm controller multi-machine selection, rich optional external control ports. Easy to use, sound and light alarm. 15 seconds fast response, the probe adopts international high-quality sensor probe. The monitoring is more accurate and the lifespan is guaranteed. It can be controlled remotely and can claim to switch the interface to view the data.