What am I doing wrong re temp sensors

[Soulwind]

I'm having trouble with the temp sensor.  I have a closed loop of H2 going through some thermo-regulators in an H2 filled room.the good part is that every loop, the H2 in the pipes keeps getting colder and colder.  The bad part is that I can't seem to get the temp sensor to be able to tell how cold.  It's only reading the room temp and that's a lot warmer than the pipes gas.  What am I doing wrong?

[Moggles]

Unfortunately the sensor cannot read the contents of pipework directly. Only the surrounding gas/liquid. You can use a surrounding gas/liquid medium as a proxy if the temperature change from pipe to environment is fast enough. Otherwise you'll have to read the contents of the H2 room.

[The Plum Gate]

perhaps exhausting the pipe into the area around the temp sensor is an option - you could use a shutoff valve to stop the process - unless you're truly circulating the hydrogen and the radiator in the same room with a pump, you'll always read the room's atmospheric temperature.

Check your material types for the sensor itself as well.

[Soulwind]

 dumping into the room and actively pumping back into the loop is what I've been doing.  So how are people building these closed cooling loops without damaging pipes?  Are they just estimating and leaving a buffer zone?

[KittenIsAGeek]

1 hour ago, Soulwind said:

 dumping into the room and actively pumping back into the loop is what I've been doing.  So how are people building these closed cooling loops without damaging pipes?  Are they just estimating and leaving a buffer zone?

The one time I did it was to use some math and figure out what steady state would be like, then set my sensors appropriately.  It did fine for a few hundred cycles, but some extra heat got in at some point and caused the system to run too long and everything broke.  Now my method is to pump it in, process it, then check the temperature at the vent on the other side of the room.

[Kabrute]

actually stick a valve on your line just before the gas hits the cooler, set your throttle to 100 g/s to start with, fill the pipe until it is full leaving only empty pipe between your valves outlet and thermos inlet.  Now as the valve bleeds the gas goes from flowing to standing in the line, your coldest point will be the first non abys pipe after the thermo, run this loop out over the area you want cooled, 50 g/s in 2kg environment of o2 will never freeze the hydrogen unless the air ALL liquifies first