GB/T 16838-2021 "Environmental test methods and severity grades for fire-fighting electronic products" stipulates the environmental test methods, severity grades and functional safety requirements for fire-fighting electronic products. Applicable to environmental adaptability testing of all kinds of fire-fighting electronic products. This standard describes in detail the test methods under different environment conditions, including low temperature, high temperature, heat and humidity, salt fog, etc., and stipulates the corresponding severity grades to ensure the Reliability and safety of fire-fighting electronic products in various environments. For fire-fighting electronic products used in special places, the test parameters can be adjusted appropriately by referring to the test methods in this standard. The normative reference documents in the standard cover various methods of environmental testing, providing comprehensive guidance for environmental testing of fire protection electronic products.