LiftMasterLMRRUL Retro-Reflective Photo Eye

will this work with liftmaster model SL585101U ?

Does it come with phot eye covers and reflect covers or weather protection shielding and mounting hardware?

Is there a way to keep the reflector from collecting few? The heater is great on one side but the reflector causes a failure every morning. I have

Can one sensor protect both the open and close motion, or are two sensors required?