Directly if there is a model, the choose and buy is ok according to the model, if not, need to figure out the type of flame detector, optical flame detector is usually used, ultraviolet flame detector and image flame detector;
What unit in use?
Whether the user has specified brand, etc. ;
Second, the quality.
Must choose normal big manufacturer, because flame detector manufacturer production experience is very important, manufacturers set up a long time, also is rich production experience, quality of the production of flame detector is relatively better.
Third, after-sales service.
After-sales service is also very important, whether the problems appeared in the process of installation will be resolved in the first place, the warranty period for the quality problem whether can free replacement, etc, these are all need to check clear before purchasing if in doubt, consult:.