noun
sense of weight; feeling of heaviness
Refers to the perception or sensation of weight, either physical or metaphorical.
このダンベルを持つと、重量感覚が鍛えられる。
Holding this dumbbell trains your sense of weight.
その彫刻は見る人に強い重量感覚を与える。
The sculpture gives viewers a strong feeling of heaviness.
重量感 is more common and means 'feeling of weight' or 'massiveness', while 重量感覚 emphasizes the sensory perception aspect.
Compound of 重量 (weight) and 感覚 (sensation, sense).