<Tr> <Th> Parent agency </Th> <Td> Council of Scientific and Industrial Research </Td> </Tr> <Tr> <Th> Website </Th> <Td> nplindia.org </Td> </Tr> <P> The National Physical Laboratory of India, situated in New Delhi, is the measurement standards laboratory of India . It maintains standards of SI units in India and calibrates the national standards of weights and measures . </P> <P> One of the most ancient texts of India, Manusmriti, describes among the duties of the king: The king should examine the weights and balances every six months to ensure true measurements and to mark them with the royal stamp .--Manusmriti, 8th Chapter, Shloka 403 . In the Harappan era, which is nearly 5000 years old, one finds excellent examples of town planning and architecture . The sizes of the bricks were the same all over the region . In the time of Chandragupta Maurya, some 2400 years ago, there was a well - defined system of weights and measures . The government of that time ensured that everybody used the same system . In the Indian medical system, Ayurveda, the units of mass and volume were well defined . </P>

Where is the national physical laboratory located in india