Pipe thermo sensors letting things through

[SquarelyCircle]

I have two pipe thermo sensor setups in which I have a pipe directly next to a liquid shut off. If the temperature is above the threshold, I have it go through the pipe. If not, the shutoff is closed, and the contents continue forward.
I'm having two problems that I believe are distinct. The first may be a glitch.
1) The thermo sensor detects that the temperatures are above threshold, and yet the shut-off doesn't open. If I go into the thermo sensor and re-enter the temperature (15 degrees C) then hit enter, the water acts correctly for a while. Eventually it stops working, and I have to go manually enter it. Notably, I am not short on power, which was my immediate first thought. The shut-off pipe should be working as best I can figure.
https://steamcommunity.com/sharedfiles/filedetails/?id=1880726801

2) In my sleet wheat setup, I have the same basic configuration. The problem over here is that sometimes very cold (-30 to -50) degree petroleum goes through the shutoff with the warmer liquid that triggered the shutoff to open. It causes the pipe to break, which means I have to open up my 200 degree chamber to get at the aqua tuners, and it messes things up for a bit.
https://steamcommunity.com/sharedfiles/filedetails/?id=1880726907

So, several questions:
Has anyone experienced these same phenomena? Have you identified the actual problem? Is there something in game that might mess this up, or is it a glitch? Is the "things sneaking through" of the second scenario a feature of the game that I need to work around? Is there a common fix for these kinds of scenarios?

(Note: in both pictures I've circled the thermo sensor and shut-off in red)

[Bread]

im having this exact thing happen, always is when theres 2 maxed out blobs of liquid, if the first one is cleared to pass, the second one at wrong temp will follow, and in the reverse case, wrong temp will be routed, but then the one at right temp will follow it.

this leads to broken pipes due to liquid freezing, in my case, i found that putting a valve that only allows 4kg of liquid kinda sorta fixes the problem, if the thing happens, the hot and cold liquid mix and the temp evens out, so it doesnt break the pipes as often.

[SquarelyCircle]

If this is a standard problem, how do the pros deal with it? It seems like a solution would be built into basically every setup. Do they have such a solution?

[L37]

Most common reason for sensor+shutoff filter to malfunction is blocked output pipe, so it might be a good idea to add overflow somewhere to prevent it from happening.
Also, what are you trying to achieve? It might be a good idea to use liquid reservoir to equalize liquid temperature, then place sensor after it, this way you will avoid getting wildly different packet temperatures.

[asanger]

Originally posted by SquarelyCircle:

If this is a standard problem, how do the pros deal with it? It seems like a solution would be built into basically every setup. Do they have such a solution?

The standard way to stop the aquatuner receiving liquid that is too cold is to have the temp sensor directly before the liquid enters the aquatuner. If the temp is too low it turns off the aquatuner and bridges the liquid into the output pipe in the same position it would have been if it went through the aquatuner.

The plumbing is really simple.
https://steamcommunity.com/sharedfiles/filedetails/?id=1880896858

The automation for it is simpler still.
https://steamcommunity.com/sharedfiles/filedetails/?id=1880897088

[The Tempted Man]

you need an overflow pipe, build asecond shutoff, then automate the not gate that when sensor activates the 1st shutoff then 2nd is turned off and you will have no issue

[Hedning]

I have not seen any issues with the shutoffs. Maybe there's a problem with the sensor being on the bridge exit tile. Otherwise I would suggest what L37 said and check if it ever backs up. The aquatuner takes a second to spin up, that may cause a hickup in the line.

The way you're describing it it sounds more like a bug. If the thermo sensor actually forgets what you set it to. I haven't seen that though. Sounds implausible.

[SquarelyCircle]

Originally posted by asanger:

Originally posted by SquarelyCircle:

If this is a standard problem, how do the pros deal with it? It seems like a solution would be built into basically every setup. Do they have such a solution?

The standard way to stop the aquatuner receiving liquid that is too cold is to have the temp sensor directly before the liquid enters the aquatuner. If the temp is too low it turns off the aquatuner and bridges the liquid into the output pipe in the same position it would have been if it went through the aquatuner.

The plumbing is really simple.
https://steamcommunity.com/sharedfiles/filedetails/?id=1880896858

The automation for it is simpler still.
https://steamcommunity.com/sharedfiles/filedetails/?id=1880897088

This is excellent. Thank you! I'll try it right away.