The BBA-2500 systems are not true “photoelectric sensors” they actually use infrared break beams, so to trigger the system both beams need to be broken simultaneously by something warm, such as a hand, arm etc. when testing. Some customers have been testing the units using pieces of cardboard etc. which block the beam, but will [...]
No, the BBA-2500 will chime once when the vehicle breaks the sensor beams than stop. It will NOT chime while the vehicle (or anything) is parked and blocking the beams.