What is the flashing red light in the hotel?

The problem refers to the working indicator light of fire sprinkler, smoke alarm or smoke detector. The following is a detailed description of these devices:

1. Fire sprinkler: When the red light flashing phenomenon you mentioned occurs on the ceiling and is associated with the sprinkler or sprinkler system, it is probably the indicator light of the fire sprinkler. Sprinkler is an automatic fire extinguishing device. When a fire breaks out, the temperature rise triggers the sprinkler to release water or special fire extinguishing medium to extinguish the fire. The flashing red light indicates that the nozzle and its control system are in normal working condition, conducting self-inspection or maintaining standby mode. This regular self-monitoring helps to ensure that the automatic sprinkler system can respond quickly and play a role in an emergency.

2. Smoke alarm/smoke detector: If the flashing red light is located on an independent device on the ceiling and the device is mainly used to detect smoke in the early stage of fire, it is probably a smoke alarm or smoke detector. These devices detect fire signs by sensing smoke particles in the air. Once the smoke concentration reaches the set threshold, an alarm will be triggered and other fire-fighting facilities will be linked. The flashing red light also indicates that the smoke sensing equipment is in normal working condition and is undergoing self-inspection or standby monitoring. This continuous self-detection ensures that the equipment can effectively perceive the fire risk at any time.