How petrol/gas pumps know when to turn themselves off

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This guy bought a farm grade gas/petrol and sawed it in half, then built semi-functional models of the working bits, to show how these nozzles "know" to shut-off when liquid touches their nose. (After 11:30 is an interesting ad but nothing more about nozzles.)

Same idea, done not so well (he knows too much), by the guy who makes most of the nozzles in the US.

I also see why we can latch-on with the little lever (here we used to carry a wood wedge) and the nozzle can still shut-off.

Study it before liquid hydrocarbon fuel goes away!
 
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Petrol pumps? Who needs them? 😉

amish-man-smiles-smugly-as-he-rides-by-gas-station-with-6-prices
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https://babylonbee.com/news/amish-man-smiles-smugly-as-he-rides-by-gas-station-with-6-prices
 
Petrol pumps are outdated and not profitable. The video is not bad, but in real life I would not apply it.
I'd dispute that. Hybrids make far more sense to me than totally electric vehicles. Given an electrical grid stable and strong enough to support everyone plugging their EV in, along with their air conditioner, electric clothes dryer, and electric oven I might be persuaded otherwise.
 
Petrol itself is outdated and un-sustainable. We've all got far too comfortable with "step on the gas and wipe that tear away". When I look at all the gas powered motion in my little microcosm - and extrapolate that to the whole country, world...I think one day the Earth is going to just cough us all up and wipe the slate clean. Now time to check The Weather thread. Hot enough for ya? Cold enough? Unseasonably enough? Let's all just keep pushing on that swing - work from home? Squash that idea...everyone's gotta drive - we have buildings and office space to fill.
 
I think one day the Earth is going to just cough us all up and wipe the slate clean.
Yes.

It's too late now for any other plausible outcome.

The main remaining question is how long we have left.

Politicians, climate scientists, environmental activists, and members of the general public still discuss what the climate might be like in the year 2100.

I think they are dreaming if they believe we will last anywhere near that long.

In just the summer of 2022 alone, 33 million Pakistanis and 7.2 million Bangladeshis were driven from their homes, lands, cities, and states by "biblical" flooding. Five feet (1.5 metres) of rainfall fell in parts of Australia during one single 24 hour period on July 4th, 2022. Spain burned. People in London sweltered in never-before-seen heat. More than 600 people died in terrible flooding in Nigeria in October.

At least 50 million people had their lives massively disrupted by extreme weather in just this one summer of 2022. That number is growing exponentially fast. Just ten years ago, annual extreme-weather victims numbered in tens of thousands, not tens of millions.

Maybe Earth won't wipe the slate entirely clean just yet - humans are even better than cockroaches at finding ways to survive in hostile circumstances.

-Gnobuddy