Running this with pyanodon's, had the following crash on placing the network sensor:
"Error while running event item-network-sa::on_nth_tick(120)
Unknown virtual-signal name: steam-150
stack traceback:
[C]: in function 'set_slot'
item-network-sa/src/NetworkChest.lua:1370: in function
<item-network-sa/src/NetworkChest.lua:1338>"
Noticed a similar bug report for the steam-250 item posted a month ago, also with a pyanodon's. From my guess, it seems to be caused by fluids with the same icon but different temperatures, resulting in one not having a proper virtual signal. I might suggest finding a general solution to this sort of issue, as giving every fluid temperature it's own icon is unsustainable in the long term.