JJG 499-2021
Precision Dew Point Hygrometers (English Version)

Standard No.

JJG 499-2021

Language

Chinese, Available in English version

Release Date

2021

Published By

National Metrological Verification Regulations of the People's Republic of China

Latest

JJG 499-2021

JJG 499-2021 history

• 2021 JJG 499-2021 Precision Dew Point Hygrometers
• 2004 JJG 499-2004 Precision Dew-point Hygrometers
• 1987 JJG 499-1987 Verification Regulation of Precision Dewpoint Hygrometer