Bosch Security Systems annunciators of the Avenar series

The range of the equipment of the fire warning Bosch Security Systems was filled up in the summer of 2015 by annunciators of the Avenar series which differ among themselves with combinations of the used sensors: thermal, smoke and gas. Competitive advantage of new products is support of intellectual technology of signal processing from sensors thanks to which each address annunciator allows to reveal and eliminate sources of the electromagnetic interferences causing its false operations. New address models are connected to ring loops of LSN or LSNi with short circuit protection and are compatible to fire panels of the brand of Bosch. Timely detection of ignitions of a number of artificial materials and/or liquids is performed by the annunciators Avenar with the thermal sensor which will be most effective for early detection of the fire on different power stations and cable networks. Besides, the address annunciator FAH-425-T-R with the temperature sensor which can work as the thermomaximum or thermodifferential sensor enters the new Avenar series. In the first case the alarm is originated by the address device at achievement of air temperature of the set threshold value (54.69 °C), and in the second — at fast increase of temperature for a certain period of time.

The universal annunciator FAP-425-DOTC-R which is supplied smoke, thermal and gas with sensors is capable to reveal emergence in air of impurity of carbon monoxide gas (carbon oxide/monoxide). Along with detection of carbon monoxide gas, this address annunciator can detect existence in the environment of impurity of hydrogen and a monoxide of nitrogen. Operation of this device is based on measurement of current intensity which is formed at oxidation of its electrode under the influence of the detected gas. At the same time the additional information from the gas sensor allows to reduce considerably the probability of false operations of address devices.

For detection in air of insignificant impurity of fine smoke smoke annunciators with Dual Ray technology which allows to detect the smoke which is selected, for example, at open burning of cellulose enter the Avenar series. To provide high sensitivity to smoke at different types of burning, such address annunciator is supplied with the special sensor with two radiating LEDs — infrared and blue. It is important to note that the Dual Ray technology allows to use address devices of the Avenar series instead of ionization annunciators of smoke in which radioactive elements are applied.

All fire annunciators of the Avenar series exercise control of level of electromagnetic aimings on site of installation that allows to reveal and eliminate interfering sources and, thereby, to exclude false operations of devices. The address annunciator constantly measures force of the electromagnetic fields influencing it in the normal mode and also calculates its instant and medium-term values which are analyzed afterwards by PKP of the fire warning. As a result of joint work, a system predicts time of achievement of a threshold of electromagnetic "zashumlennost" of the environment which will lead to false alarms from address devices.

It is considerable the intellectual ISP technology (Intelligent Signal Processing) which the annunciators Avenar use for signal processing, arriving from the sensors which are built in them allows to increase reliability of detection of ignitions. Thanks to implementation of ISP technology, the address annunciator of Bosch creates the message about alarm only when the combination of signals from sensors corresponds to real ignition. Such high accuracy is provided with the special algorithm of ISP comparing data of the test fires from 5,000 different scenarios of development of burning to the real data received from address models of the Avenar series.