The listed spacing for heat detectors is S = 50 ft. (15.3 m). 0000001671 00000 n • There are two main types of smoke alarms, and both detect all types of growing fires. Types of Smoke Alarms 01 DFES recommends photoelectric smoke alarms There are two main types of smoke alarms, with the difference being their smoke sensing technology. Smoke detector consists of two parts: A sensor to sense the smoke . Smoke detector – Types of detectors. smoke detector is designed to give early warning of developing fires with an alarm sound from its built-in siren. The response of beam smoke detectors is generally less sensitive to the type and color of smoke. There are two main types of smoke detectors: photoelectric and ionization. A smoke detector is a device that senses smoke, typically as an indicator of fire.Commercial smoke detectors issue a signal to a fire alarm control panel as part of a fire alarm system, while household smoke detectors, also known as smoke alarms, generally issue an audible or visual alarm from the detector itself or several detectors if there are multiple smoke detectors interlinked. 0000001560 00000 n Most smoke alarms mentioned in this article can be found at your local hardware store, large retail stores, big box and discount stores, on the internet, or a certified electrician. SMOKE DETECTOR A smoke detector is a device that senses smoke, typically as an indicator of fire. Carbon monoxide detector is also known as CO detector. A Brief Introduction to Smoke Sensor. Smoke detectors are designed to sense the products of combustion. 0000010101 00000 n 1.4. FSP-951 Series plug-in intelligent smoke detectors use a detach-able base to simplify installation, service and maintenance. Large homes may need extra smoke alarms. 10 2.1. When the level of carbon monoxide (it is a poisonous gas produced by combustion) crosses the specified limit, it indicates and triggers the fire alarm system. 0000001873 00000 n 0000013159 00000 n %PDF-1.4 %���� The smoke detector then senses the drop in current between the plates and sets off the alarm. 158 0 obj <> endobj Learn More Smoke detector & fire Alarm system project Report | lecture notes, notes, PDF free download, engineering notes, university notes, best pdf notes, semester, sem, year, for all, study material Smoke Detector Operations: Ionization and Photoelectric . So basically, smoke alarms are what you would find in most residences, whereas smoke detectors are usually found in places of business. When smoke particles cloud the beam, a photoelectric cell senses the decrease in light intensity and triggers an alarm. spacing of detectors by using horizontal spacing from the peak of the roof or ceiling. In this article, though, we’ll be focusing mainly on residential smoke alarms. At this point you might wonder why anyone even bothers with knowing … Types of Carbon Monoxide Detector. There are two main types of smoke alarms, which are categorized by the type of smoke detection sensor, ionization and photoelectric, used in the alarm. A third type of end of line device is a diode. This type of alarm is generally more responsive to a flaming fire, according to the NFPA. 0000051312 00000 n MAINTENANCE Always follow the manufacturer’s instructions and recommendations on how to maintain your smoke alarms. <]/Prev 181894>> Photoelectric smoke alarms are generally more responsive to fires that begin with a long period of smoldering (called “smoldering fires”). Heat Detectors. 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