Digital EU show

EU or reactor heat?

I think he's asking about EU.

I'm not sure how that guy's measuring the EU of the reactor, actually. It must be some sort of add-on that I have not seen before.

The one that I saw on that video and recognised measures hull heat, it emits redstone at a given temperature, which he has coupled with wireless redstone. The mod is Thermal Monitoring for Nuclear Reactors, though as that isn't currently compatible, you may be interested in Nuclear Control.

If it's something you want to use to see your reactors output I think this(the awesome reactor planner made by Talonius)is what you are looking for.

I suppose gigagames wants a device which outputs redstone power when a certain number of EU/t is reached. Not heat. Not something what shows how much EU/t a reactor will output. Just a cable-like device outputting redstone power when enough EU/t are flowing through it. I think.

But the EU output is constant and doesn't fluctuate, not really needing monitoring. If you're messing with nuclear power, you should have a fair idea of how much power you'll be generating.

In the shown design uranium cells are taken out of the reactor for cooling, or better non-heating, so the output does fluctuate.