place DTEC and put EMBR on it
Range of a detector is set with tmp2 which isn't able to be serialized and has a max of 25, and just set the ctype of the detector to EMBR to detect it.
There's RSST, DESL, or LAVA with a ctype of VIBR for room temperature redish liquids. I'd recomend using deco to colour some other liquid red if those don't work out.
Let Me end this all for once holy, Blood red! Thats a ctype! HERE. Is the ctypes for colors. https://powdertoy.co.uk/Wiki/W/Wavelengths.html