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Legal Metrology Act, 2009 (Section 22)

Legal Metrology Weight and Measurement

Turnkey Model Approval from Central Legal Metrology Department, NPL testing coordination, State Manufacturing/Dealer/Repairer licensing, and annual Stamping & Verification.

Home Services Weights & Measures
Section 22 Mandate

What is Legal Metrology Model Approval?

Weights and Measures Model Approval
Central Model Approval & State Stamping Verification Legal Metrology Act, 2009

Under Section 22 of the Legal Metrology Act, 2009 and the Legal Metrology (Approval of Models) Rules, 2011, no person or enterprise can manufacture or import any weight or measure instrument in India without obtaining prior Model Approval from the Central Director of Legal Metrology (Ministry of Consumer Affairs).

The model approval verifies that the measuring device conforms to statutory accuracy tolerances, temperature resistance, anti-tamper sealing, and metrological standards (OIML guidelines). Following Model Approval, the equipment must undergo periodic verification and stamping by the State Legal Metrology Inspector.

Testing in RRSL / NPL

Sample testing in National Physical Laboratory (NPL) or Regional Reference Standards Laboratories (RRSL).

State Dealer / Manufacturer Licenses

Assistance for State LM-1 (Manufacturer), LD-1 (Dealer), and LR-1 (Repairer) licensing across all Indian states.

Instruments Covered

Instruments Requiring Section 22 Model Approval

All commercial, industrial, clinical, and trade measuring devices require model approval:

Electronic Weighing Scales
Tabletop, platform, jewel scales, weighbridges, crane scales
Fuel Dispensing Units
Petrol/diesel flow meters, CNG dispensers, LPG mass flow meters
Water & Flow Meters
Domestic water meters, ultrasonic meters, electromagnetic flow meters
Clinical Instruments
Digital thermometers, Sphygmomanometers (BP monitors), infant scales
Technical FAQs

Frequently Asked Questions

The process takes approximately 45 to 60 days, including sample testing at an authorized RRSL laboratory and final scrutiny by the Central Legal Metrology Directorate.

No. It is a cognizable legal offense under the Legal Metrology Act to import, distribute, or sell any unapproved weighing/measuring instrument without central Model Approval and subsequent state stamping.
Get Model Approval License

Complete Section 22 model approval, RRSL lab testing, and dealer licensing.


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