Model Approval of weight and measure instruments is regulated by Legal Metrology Act, 2009 read with The Legal Metrology (Approval of Models) Rules, 2001.
These rules govern approval by Central Government for manufacturing and importing weight and measure instruments in order to avoid usage of faulty and unauthorised instruments. Model Approval means all weight and measuring instruments undergo testing and calibration according to the standards laid down in the Legal Metrology Act to maintain accuracy.
“Model” means the final physical representation of a weight or measure in which all the components imparting to it the necessary metrological and technical characteristics and qualities as provided in the Act and the Rules made there under are suitably assembled so that subject to prescribed tolerances, every weight or measure produced in accordance with such model may be similar as regards dimensions, constructions, material performance and other metrological and technical characteristics.
Every person before manufacturing or importing any weight or measure instruments shall seek the approval of model from the Legal Metrology Department along with payment of fee as may be prescribed by the authority.
The prescribed authority may, if he is satisfied that the model of any weight or measure which has been approved in a country outside India conforms to the standards established by or under this Act approve such model without any test or after such test as he may deem fit.