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Alarmed Smoke Detectors
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Smoke detectors may have audible alarms, visual alarms, (LEDs) or both. They may also have alarm output to a control unit. Smoke detectors without a built in alarm come with alarm contacts for output to an external annunciator in the detector base or to a control unit. Smoke sensing ICs may come with piezoelectric horn drivers or with alarm output circuitry. The National Fire Protection Association (NFPA) establishes minimum requirements for fire alarm systems and initiating devices such as smoke detectors. Smoke detectors and fire alarm systems that support NFPA 72 must produce an audible alarm signal that is different from all other audible signals. Products & Services
Smoke detectors are designed to sense the products of combustion. Common types include ionization chambers and photoelectric devices.
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Fire protection services install, maintain and monitor safety equipment such as flame and smoke detectors, sprinkler systems, fire alarms and annunciators.
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Annunciators and graphic display panels disclose the layout and annunciate the status and measurement parameters of industrial processes, security and fire alarms of buildings and manufacturing facilities, power distribution networks, and other operations.
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Audible alarms provide an audible indication of a hazardous situation.
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Fire alarm control panels (FACP) are systems which receive information from input devices (smoke detectors, heat detectors, etc.), process the information, and trigger an output device such as an audio or visual alarm.
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Product Announcements
Topics of Interest
Photoelectric smoke detectors contain a light and a sensor at 90-degree angles to one another. Normally, the light from the light source shoots straight across the device and misses the sensor. When...
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Synchronization refers to the alarm, annunciator, or control panel that provides built-in synchronization of audible signals or strobes. NFPA 72 requires visual appliances to flash in synchronization...
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Ionization chamber smoke detectors use an ionization chamber and a source of ionizing radiation to detect smoke. This type of smoke detector is very common because it is inexpensive and good at...
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Appendix List
Appendix 1: Specifications for the FPE Exam
Appendix 2: State Boards of Engineering Registration
Appendix 3: States/Jurisdictions That Have Offered the FPE Exam
Appendix 4:...
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1 GENERAL REQUIREMENTS
1.1 Criteria
In addition to applicable federal regulatory standards, all machines shall be designed in accordance with the provisions of the criteria contained herein,...
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