Conventional Fire Detection Systems
Conventional fire detection systems are a type of fire detection system that is uncomplicated and includes less functions than addressable systems. In conventional systems, each device can’t be monitored and controlled separately. For this reason, they can detect or monitor on the basis of region (line), not device. They are often preferred because they offer economical and simple solutions for relatively small areas that don’t contain much system equipment. Conventional type panels are selected according to the number of zones. Conventional type panels have 2-zone, 4-zone, 8-zone versions, etc. The number of devices that can be connected to each region may differ depending on the manufacturer, but it is usually around 20-30 devices per region.
Conventional Sensing System Components;
Fire Detection Panel
Smoke Detector
Heat Detector
Combined Detector
Manual Call Point
Notification Devices (Sounder, Sounder-Beacon, Beacon, Horn etc.)
Addressable Fire Detection Systems
Addressable fire detection systems are systems that are used in many areas today and inform about the fire situation with details. The system consists of a fire detection panel in the center that provides management and peripheral components that send and receive information to this panel. Each of the components in the system has a unique address (identification information); therefore, alarm information is received on a device basis.
Addressable detection systems can be used in high-rise buildings, large-volume campuses, airports, commercial buildings or residential areas. Fire evacuation scenarios designed by the fire consultant can be installed on the system to minimize loss of life in large-volume buildings. There are different types according to the communication between the panel-field components such as digital addressable, analog addressed, interactive addressed according to the specifications of the manufacturer.
Where integrated building management systems need to be managed under a single roof, the fire detection system can transmit and / or receive information to other systems using international communication protocols.
Addressable Detection and Signal System Components;
Addressable Fire Detection Panel
Addressable Smoke Detector
Addressable Heat Detector
Addressable Combined Detector
Addressable Manual Call Point Button
Addressable Notification Devices (Sounder, Sounder-Beacon, Beacon, Horn etc.)
Addressable Input / Output Module
Addressable Relay Output Module
Addressable Siren Control Module
Explosive Gas Detection Systems
Toxic and combustible gases used in industrial plants or occurred as a result of process is an always dangerous and risky situation. Uncontrolled extraction of these gases occur industrial accident risk. In case of uncontrolled situations, extracted gases must be detected quickly and accurately; after detection alarm signals must be transmit to the central control stations. Gas detection systems are used in many industries and have an important role in the prevention of industrial accidents. Measurement of combustible gases is based on the lower explosion limit (LEL), whereas for toxic gases, a particle per million (ppm).
Gas Detection Detector Types
Fixed gas detectors
Portable gas detectors
Open area gas detectors
Sectors Used
Oil and Gas
Iron and Steel
Chemistry
Machinery and Mining
Wastewater Treatment Plants
Other Industrial Facilities
Flame Detectors
Flame detection is preferred when fire moves to flame phase from incipient phase quickly or open areas where optical smoke detection is not possible. Optical sensors detect electromagnetic radiation that flame emits in the infrared (IR), visible light, and ultraviolet (UV) wavelengths and transmit alarm data to central control station. Hazardous areas which have high explosivity and/or fire risk uses special flame detectors to minimize intervention duration. False alarm rate, detection range, external factors affect etc. are most important criteria about proper product selection.
Optical Flame Detector Types
UV
IR
IR2
IR3
UV / IR
Air Sampling Smoke Detection Systems
Early detection in places you have critical and valuable assets is very important criteria. Point type smoke detectors wait for smoke to reach it; so it takes time according to the size of enclosure. However air sampling systems vacuums air itself and analyze if there is any smoke particles or not. This process significantly shortens time to detect fire. For air sampling systems special pipes are installed within enclosure and calculated holes are drilled. Design and engineering is made on special design software.
Where Used
Data Centers
Server Rooms
Panel Rooms
Anywhere early detection required
Linear Heat Detectors (LHD)
Cable type detectors are also known as Lineer Heat Detectors. Special cables are used to detect fire and transmit fire information to the central fire alarm detection system. LH’s are preferred where point type detectors can not be used. LHD’s have different types suitable for indoor or outdoor. LHD’s have three types according to the technology used.
Digital LHD Cables
Digital LHD cables work like fixed heat detectors. They have different models according to the alarm temperature and ambient temperature. Any additional controller is not required; LHD cables can directly be connected to the Fire Alarm System via input modules. Distance locator devices can be used optionally. These devices directly shows alarm point which can be useful at long distances. Digital LHD cables have different types according to the usage area. If it will be used at corrosive environment or outdoor; stainless steel option should be preferred. Basically digital LHD cable melts at alarm point and creates alarm; then sends this information to the main fire alarm detection system. Digital LHD cables must be replaced after fire situation. Digital LHD cables are most cost effective types of LHD’s.
Analog LHD Cables
Analog LHD cables work like fixed and/or rate of rise heat detectors. They must be used with a controller. Alarm temperature can be set on controller. Analog LHD cables have special conductor inside which detects alarm at set point. Controller receives temperature information from cable and evaluates if it is a fire alarm or not. Controller transmit fire alarm information to the main fire alarm system via input modules. Analog LHD cables are reusable after fire if not harmed.
Fiber Optical LHD Cables
Fiber Optical LHD cables work like fixed and/or rate of rise heat detectors. They must be used with a controller. Alarm temperature can be set on controller. Controller receives temperature information from cable and evaluates if it is a fire alarm or not. Controller transmit fire alarm information to the main fire alarm system via input modules. Fiber Optical LHD cables are reusable after fire if not harmed. Fiber Optical LHD cables are much more sensitive and faster than other LHD technologies. Fiber Optical LHD cables can be used with long distances like 8-10km.