Filtering air problem

[ewpayne]

So I used a gas element sensor combined with a gas shutoff valve. Some people on youtube say its better then using a gas filter. That was all well and good. I had a room of oxidizers making oxygen and hydrogen. I made 4+ gas pump sucking up all the air and using my previous filtration system to energize a hydrogen generator. But every so often 100 grams of oxygen would sneak past the filter and makes its way into the generators.

I had to resolve this by making another filter system right before the generators that would detect oxygen and spit it out of the pipes.

My question is why was oxygen coming through even though I filtered it for hydrogen?

[asanger]

It's probably because your oxygen is backing up due to the vent being overpressure.
You end up with a packet of hydrogen at the sensor but because the oxygen isn't flowing it sends it through the hydrogen line before the hydrogen can move on.

I used to use the same system because it's less power hungry and run into the same problem.

I tend to use a a mechanical filter set up now, where you use bridges from your electrolyser pipeline to connect to a hydrogen line running 1g of hydrogen through a loop

[Dschinghis Pan]

The shutoff-filter will fail if either pipe backs up.
If the filter output is full, everything will go into unfiltered into the other pipe, just like it would if there was no filter at all.

If the filter-output is free but the other pipe is full, the game will actually send 2 packets through the filter. That is the downside of the shutoff-filter.

[Legensy]

This method is not better,it just gives you another benefits.
gas filter = -240 energy,but guaranted gas split,no gas flow headache,but energy problem.

You can build a room with isolated pumps,it almost guarantees gas splits,with a right pressure configuration.I made a filter just for a 200% splits,but u can try this scheme without one.

https://steamcommunity.com/sharedfiles/filedetails/?id=1851529230

[Hedning]

To prevent the o2 messing up your filter create an overflow pipe. Take the overflow and loop it back, giving it priority to any new input.

[ewpayne]

Thanks.