Active network by sampling the air samples collected from dangerous areas, if necessary, will carry out the filtering and processing of the air in the air is not visible smoke particles were analyzed to determine the fire area (sampling tube), set of 4 programmable alarm threshold, the relay output or the communication network alarm. At present, the leader of the air sampling smoke detector is: ICAM air sampling smoke detection system, and its sensitivity reaches 0.001obs/m. Fire can be detected 1 hours ahead of schedule.
It is a fire detector that responds to smoke parameters around a narrow strip in the guard area. The main difference with the previous two point type smoke detector is the beam line type smoke detector transmitter and a receiver is divided into two independent parts, two use separate relative, middle connected by beam. The infrared beam smoke detector is divided into two types: the opposite and the reflected.Smoke fire detector suitable for installation of smoke generated larger or prone places in the smoldering fire; it should not be installed in place usually large smoke or ventilation speed.
It is developed by using the basic properties of light generated by fires that can change the propagation properties of light. According to the absorption and scattering of light by smoke particles. The photoelectric smoke detector is divided into two types: shading and astigmatism.
It contains a small amount of radioactive material in the ionization chamber, the ionization of indoor air become a conductor, by allowing a certain current between two electrodes in the air, the air into the local ray ionization state, the voltage effect on the formation of ion flow, which gives the ionization chamber of an effective conductivity. When the smoke particles enter the ionized region, they reduce the conductivity of the air due to bonding with the ions, resulting in the weakening of the ion movement. When the conductivity is below a predetermined value, the detector alarms.
