to trigger an alarm for the beam detector will depend on the "smoke density pass through the detector path". But the question is how do you measure the smoke density? According to your description, it most likely your observation and feeling, but without any specific figures.
Hi Ron,
Please help to clarify, a single Reflector can be use for the Fireray 100RV if distance is less than 50m. Or they have selection the wrong model if distance below 50m, and 50RV must be used. Please advise.