Fire protection retroreflective sensor MLV12-54-2563/49/124, Small fire protection photoelectric sensor, Retroreflective Sensors, Small fire protection photoelectric sensor for safety devices on fire barriers, Approval in accordance with VdS Test Report FSA and externally monitored manufacture (?? Symbol), High protection against contact, Not sensitive to ambient light, even with switched energy saving lamps, Not sensitive to ambient light, even with switched energy saving lamps, Protected against mutual interference (no cross-talk), Protection class II