The first and foremost duty of the Department of Legal Metrology is to build confidence in the consumers and to make the uniformity of the standards, in accordance with the International System of Units (SI). The noble and bounden duty of the Department of Legal Metrology is to project and to protect the interest of the people by providing actual assistance and services of Legal Metrology and to ensure the correctness in all sorts of measurements particularly related to the commercial transactions.

For protecting the Rights and Interests of the Consumers, the following Acts and Rules are being enforced by this Department.

• The Standards of Weights and Measures Act, 1976.
• The Standards of Weights and Measures (Packaged Commodities) Rules, 1977.
• The Standards of Weights and Measures (General) Rules, 1987.
• The Standards of Weights and Measures (Approval of Models) Rules, 1987.
• The Standards of Weights and Measures (Interstate verification and stamping) Rules, 1987.
• The Standards of Weights and Measures (Numeration) Rules, 1987.
• The Standards of Weights and Measures (National Standards) Rules, 1988.
• The Standards of Weights and Measures (Enforcement) Act, 1985.
• The Kerala Standards of Weights and Measures (Enforcement) Rules, 1992.

The Controller is the Head of this Department looking after all the Statutory, Administrative and Legal matters. As per G.O. (MS) No.352/07/GAD dated 17.7.2007, the Government of Kerala have constituted a new Department named as the Department of Consumer Affairs.