The VLP21/VRH by Delta is a Laser Barrier which emits a high power infrared laser pulse. The whole system works via pulse that is received by photosensitive diode which is fitted having an optical filter. A signal then is being processed through the use of circuitry in the receiver VRH. The performance of the equipment depends on whether the modulated beam is being cut or not.
Type of beam : single-beam
Other characteristics : laser
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