A butyrometer is an instrument used to determine the fat percentage in milk. It works on the principle of centrifugal separation of milk's components. It is commonly used in the dairy industry to assess the quality and richness of milk in terms of fat content.
- Option (1) is incorrect because the butyrometer does not measure the water content in milk.
- Option (2) is correct because the butyrometer is specifically used to measure the fat percentage in milk.
- Option (3) is incorrect because the butyrometer is not used for protein content measurement in milk.
- Option (4) is incorrect because the butyrometer is not used for measuring fat content in oils.
Thus, the correct answer is option (2): Detect fat percentage in milk.