SP 4 : 2025 Revised State of The Art of Metric System in India (An update to the SP4 : 1969 Metric Change in India)
FOREWORD
This Special Publication, 'Revised State of the Art of Metric System in India' is an update to the SP4 : 1969 Metric change in India. The text of this publication finalized by the Weights and Measures Sectional Committee had been approved by the Production and General Engineering Division Council.
This special publication contains recent developments and global perspectives about the metric system. The recent international decision on the redefinition of the SI base units based on fundamental constants and quantum standards, as well as its implications, finalized in 26th General Conference on Weights and Measures (CGPM), are briefly discussed. By elucidating the modern metric system, it ensures alignment with international standards set by the International Bureau of Weights and Measures (BIPM) and aims to disseminate these capabilities nationwide. It also provides a comprehensive overview of the current status of the SI unit system and initiatives for the establishment of redefined quantum standards in India.
ABOUT BUREAU OF INDIAN STANDARDS
Bureau of Indian Standards (BIS) is the National Standards Body of India established under the Bureau of Indian Standards Act, 2016 for the harmonious development of the activities of standardization, marking and quality certification of goods and for matters connected therewith or incidental thereto. BIS has been providing traceability and tangibility benefits to the national economy in a number of ways, such as, providing safe reliable quality goods; minimizing health hazards to consumers; promoting exports and imports substitute; control over proliferation of varieties, etc through standardization, certification and testing.
ABOUT SP4 : 1969 'METRIC CHANGE IN INDIA'
SP4 is the first authoritative narrative of India's transition to the metric system and the decade that followed. It delves into the challenges faced during this monumental shift in the country's measurement system, mirroring experiences across diverse regions. SP4 encapsulates India's journey through metric change, offering invaluable insights for both developing and advanced nations engaged in similar endeavours.
Comprehensive scope of SP4 spans various disciplines, encompassing basic standards, metrology, railways, shipping, civil aviation, posts, telegraphs, telephone services, construction, and engineering industries. Its meticulously documented content establishes it as the definitive reference work of its time on this subject.
Through first-hand accounts, SP4 illuminates the historical, legislative, educational, and public relations dimensions of this bold experiment. Whether a specialist seeking in-depth analysis or a lay reader intrigued by this transformative era, SP4 serves as both inspiration and a blueprint for emulation.