The Central Government has informed the Legal Metrology (General) Fifth Amendment Rules, 2025, under the Legal Metrology Act, 2009. These rules revise the Eighth Schedule of the Legal Metrology (General) Rules, 2011, explicitly Part VI, Part C.
Key updates comprise a revised definition of a complete thermometer. It now denotes to a device that includes a unit for measuring and indicating temperature, either as an interchangeable system that is compatible with the response of the probe or as a permanently connected unit.
Moreover, clause (i) of paragraph 5(1) has been updated. The acceptable temperature range for specific devices has been altered from “36.9°C to 37.1°C” to a broader and more standardized “37°C = 1°C.” Additionally, a correction has been done in Note (2) by updating the reference from “5(2) (7)” to “5(2) (i)”.
The purpose of this amendment is to ensure better precision, accuracy and standardization measuring instruments under legal metrology, mainly thermometers. The changes will come into effect from the date of publication in the Official Gazette.