https://www.siemens.com/en-gb/products/fire-detection/flame-detectors/
Flame detectors | Siemens
Detection of smokeless liquid and gas fires as well as smoke-forming open fires indoors and outdoors.
flame detectorssiemens
https://www.balafire.com/
Flame Detectors and Gas Fire Extinguishing System | Balafire
fire extinguishing systemflame detectorsgasbalafire