Jan 23, 2023 09:15:00

Slow motion video taken at 150,000 FPS how the world's smallest class fire extinguisher works

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E-Bulb ', which is the world's smallest fire extinguisher with a size of only 2 cm, is used to prevent fires in electronic equipment. There are few opportunities to see the actual operation, but YouTuber ' The Slow Mo Guys ' has released a slow motion video shot at 150,000 FPS to see what happens when it works.

Tiniest Exploding Fire Extinguisher at 150,000FPS-The Slow Mo Guys-YouTube


Mr. Gav and Mr. Dan of YouTuber 'The Slow Mo Guys'.

Mr. Gav is surprised by 'E-Bulb' that Mr. Dan took out from the fire extinguisher talk. In addition, on the E-Bulb official website, it is also expressed as 'circuit breaker with fire extinguisher', which may be more accurate.

A high-speed camera

Phantom TMX 1750 is used for shooting. The shooting speed is full frame at 76,000 frames per second and segment frame at 1.75 million frames per second.

A simple device for operating the E-Bulb. Ignite a paper towel soaked with ethanol.

And set the E-Bulb nearby.

Just before the E-Bulb activates, the light on the bottom left of the case lights up, indicating that it is in a conductive state.

The fire went out with a popping sound, and the light at the bottom left of the case went out. This shows that the E-Bulb has a conductive coating and normally conducts electricity, but in the event of a fire it bursts and stops the supply of electricity.

Slow motion video taken from the front.

You can see that the E-Bulb is popping. The structure is a glass ampoule filled with a non-toxic extinguisher, so it simply breaks during operation.

The Slow Mo Guys have a hard time shooting flames well. I managed to build a wall outside the case to block the wind, create an environment where the flames can be seen well, and shoot at 150,000 FPS. 150,000 frames per second is equivalent to 6000 times the real time.

A flame flickers in front of the E-Bulb, and the temperature pops between 135 and 165 degrees.

When it pops, you can see the flame move as if it were sucked into the E-Bulb.

After that, you can see a shimmer above the cracked E-Bulb. This can be thought of as heat or vapor diffusion.

The Slow Mo Guys has shot a number of slow motion images, but it seems that it was quite difficult to shoot so that the movement of the flame can be clearly seen.