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1. Market status of human body static discharge devices: Some domestic companies have begun using metal conductors for direct grounding and discharge in flammable and explosive hazardous environments in order to eliminate human body static electricity. Although this method can eliminate static electricity in the human body, since it relies on discharge between conductors to release that static electricity, it is inevitable that the energy released during such discharges is relatively high, which can lead to spark formation. These sparks may directly ignite flammable materials, resulting in fire and explosion accidents. According to scientific calculations, when the static voltage on the human body reaches 2000 V (with typical values ranging from 1000 V to 10,000 V), the discharge energy between the human body and a conductor can reach 0.4 millijoules. This value is far higher than the minimum ignition energy of oil vapors, which is 0.2 millijoules; thus, the conditions for triggering fires and explosions are fully met. Therefore, using grounded metal conductors to discharge static electricity from the human body in flammable and explosive areas is a highly risky method for eliminating such static electricity, and **it has been strictly prohibited. 2. Recommended solution: To safely eliminate static electricity on the human body, it is necessary to install intrinsically safe explosion-proof static electricity discharge devices. These devices represent the best solution for eliminating static electricity in flammable and explosive environments such as gas stations, fueling stations, oil depots, and chemical plants, thereby ensuring safe production. 3. Product Features: The intrinsically safe explosion-proof human body static discharge device (FJDEx series) is an intrinsically safe, explosion-proof device designed to safely eliminate human body static electricity in flammable and explosive environments. The method of discharging human body static electricity is via grounding. It has passed the tests conducted by the Static Electricity Detection Center of China National Petroleum Corporation, and fully meets the technical requirements specified in the \"General Guidelines for Preventing Static Electricity Accidents\" GB12158-2006. 4. Structural appearance: The top of the explosion-proof human body static discharge device features a black spherical semiconductor touch element; this spherical semiconductor touch element is connected to a stainless steel support rod, inside which there is a passive circuit composed of a conductor core and other components. The support rod is welded to the bottom external fixing mechanism. With a total height of 1.1 meters, it is designed based on ergonomic principles to ensure comfort when touched by humans. Powerless light sources can also be installed to guide operators on-site in low-light conditions or at night. Semiconductor touch surfaces can be fitted with various attractive cartoon characters, further encouraging operators to touch them. 5. Usage method: When in use, keep the palm of the hand in contact with the spherical touch element for 10–15 seconds to ensure complete and safe release of static electricity from the body. 6. Explosion prevention principle: For an explosion to be triggered by human body static electricity, the following four conditions must be met: First, there must be conditions for the generation of static electricity (including induced charging) ； Again, when static electricity accumulates in the human body and reaches the voltage level that can cause spark discharge ； Also, there is a certain amount of explosive mixture in the environment of discharge sparks ； Finally, the spark energy from electrostatic discharge must reach the minimum ignition energy of the explosive mixture; all of these conditions are essential. Explosion-proof human body static discharge devices can eliminate the static electricity accumulated in the human body, preventing it from reaching a voltage level that could cause spark discharge. The touch element is made of semiconductor material, which prolongs the time taken for static electricity to be released from the human body, **reducing the energy released during such instantaneous discharge. When releasing static electricity from the human body, no discharge sparks are generated (even if the static voltage accumulated in the body has exceeded the voltage level at which discharge sparks occur). This eliminates the minimum ignition energy required to ignite explosive mixtures, effectively removing two of the four conditions necessary for an explosion caused by human body static electricity, and thus completely eliminating the possibility of such explosions. 7. Installation and use: The explosion-proof human body static discharge device is small in size, light in weight, and strong in durability ； It requires no power supply and is easy to install; the product comes with detailed installation instructions, allowing it to be operated by ordinary maintenance technicians. External fixing devices come in various installation types such as pipe clamp type, cement floor type, and plate clamp type, to suit different installation environments. The pipe-clamp type explosion-proof human body static discharge device is installed on the steel pipes on site, with the pipes connected using paint-breaking bolts; since the steel pipes are already grounded, no grounding wire is required in this setup. Installation location of pipe-clamp type explosion-proof human body static electricity discharge device: (1) Steel pipe guardrail at the staircase entrance of storage tanks ； Drain pipe at the sampling port under the tank (2) – Steel pipe guardrail on the operation platform in the equipment area ； Steel pipe guardrail for walkways ； Steel pipe guardrail for climbing ladders ； Sampling port drain tube ； Drain pipe (3) – Steel pipe guardrail for loading platform on railway tank cars ； The steel pipe guardrails at each crane position, as well as the cement-floor-mounted explosion-proof human body static electricity discharge devices, are installed on the ground site and require grounding wires. (1) Irrigation area entrance (2) Pump house entrance (3) Equipment area entrance (4) Near the road tanker loading dock (5) Near the fuel pump at the gas station. 8. Installation precautions: It is prohibited to touch the metal support rods of the static electricity discharge device with bare hands to discharge static electricity. The static discharge device must be connected to a substance (object) that is grounded ； During the installation process, conditions must be met to avoid working with open flames and thus prevent accidents. Before installation, it is necessary to check whether the semiconductor touch element and the connection points are damaged; installation and use are strictly prohibited if any damage is found. Keep the touch surface clean during use. 9. Recommended installation density: When a person walks 25 meters, the energy released from the static electricity accumulated in the body is much higher than the minimum ignition energy of oil vapors, which is 0.2 millijoules; therefore, it is recommended to install an explosion-proof static electricity discharge device every 25 meters.