Safety and control devices for gas burners and gas-burning appliances. Particular requirements - Automatic and semi-automatic valves Ingestion-build-177197 where the ultrasonic attenuation spectrum

where the ultrasonic attenuation spectrum is not a linear function of the particle volume fraction

BS EN 50341‑2‑9:2017+A1:2018 supersedes BS EN 50341‑2‑9:2017

5 g and a volume of the test solution of 25 ml after pressure digestion

Flame emission spectrophotometry relies on the characteristic emission of light by atoms of many metallic elements given sufficient energy

Declaration of conformity based on full quality assurance plus design examination:

Safety and control devices for gas burners and gas-burning appliances. Particular requirements - Automatic and semi-automatic valves Ingestion-build-177197 where the ultrasonic attenuation spectrum