Why can’t you make a phone call (mobile phone) in a gas station?

Reasons for not making phone calls in gas stations:

1. When making a phone call, there will be current inside the mobile phone, which may produce small sparks.

2. The gas station is full of gasoline molecules (excluding diesel, which is difficult to burn). Once it encounters a spark, it may ignite the gasoline.

3. When the air expands rapidly after gasoline is ignited, an explosion will occur.

Mobile phone radio frequency sparks, oil and gas explosions caused by mobile phone static electricity, and strong mobile phone signals will interfere with the gas pump instrument.

Mobile phone RF can ignite fuel and gas: The radio waves (radio frequency electromagnetic radiation) emitted by the mobile phone RF transmitter, as a wireless communication tool, can cause the antenna that receives the radio to generate radio frequency current. Radio frequency sparks can occur when conductors have poor contact or become rusty. As long as the radio frequency spark lasts for more than one microsecond and the energy is greater than 6MW, it will ignite and cause disaster.

Static electricity in mobile phones can cause explosions: the current required to ignite fuel gas is very small, and the static electricity flow generated by mobile phones in working conditions can reach this limit. In addition, since the mobile phone does not have an explosion-proof function, if the mobile phone is used for a long time or the quality of the mobile phone itself is poor, the circuit of the internal chip of the mobile phone is prone to short circuit, causing the mobile phone to generate a small amount of sparks in an instant, thus causing an explosion.

Mobile phone signal interference meter: When a mobile phone receives or sends a signal and creates a loop, the mobile phone will produce a series of high-frequency irregular harmonics. This kind of harmonics will cause great interference to electronic equipment, affect the gas dispenser and the computer-controlled instruments inside the gas dispenser, interfere with the information transmission of the counter, and cause inaccurate measurements.

Extended information:

As a radio communication tool, the radio waves (radio frequency electromagnetic radiation) emitted by the radio transmitter can cause the antenna that receives the radio to generate radio frequency current. When RF current circulates between metal conductors, RF sparks are generated to prevent corrosion or poor contact. As long as the radio frequency spark lasts for more than one microsecond and the energy is greater than 6MW, the mixture of methane and air will be ignited.

Since gasoline is a volatile substance, radio frequency sparks generated by mobile phones can easily cause explosions in flammable gas danger areas caused by leaks in oil and gas tanks and natural gas pipelines, causing disasters. When a gas station fills a car or motorcycle tank with gasoline through a fuel gun, the oil vapor in the original empty tank will float outward.

In addition, the newly injected gasoline will also evaporate into the air, which causes the density of oil and gas around the refueling truck to increase sharply. At the same time, in order to make communication signals clearer, people use mobile phones with high frequency and high transmission power. Although it meets national standards, it still poses a serious threat to gas stations.

Since gas stations and gas stations are now generally controlled by computers, high-intensity mobile phone signals will cause induction of computer equipment, and the instantaneous electronic friction will ignite fuel vapor and cause an explosion. The current required to ignite oil and steam is very small, and the static current generated by the mobile phone during operation can reach this limit.

During the filling and unloading process of the gas station, if there is foggy weather with high air humidity and low air pressure, due to poor air circulation, the density of oil and steam will increase correspondingly, which may cause explosions when using mobile phones. The possibility increases further.

In addition, since the mobile phone itself does not have an explosion-proof function, if the mobile phone is used for a long time or the quality of the mobile phone itself is poor, the circuit of the internal chip of the mobile phone is prone to short circuit, causing the mobile phone to generate a small amount of sparks at the moment of answering, which may also cause Gas station explodes.