Yes, SENSORIUM is a Scrabble word!

Letter values in Scrabble US: S 1, E 1, N 1, S 1, O 1, R 1, I 1, U 1, M 3.

Is it a valid word?

SENSORIUM is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the areas of the brain that process and register incoming sensory information and make possible the conscious awareness of the world