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L1-02B-23- Smoke Number & Location

L1-02B-23- Smoke Number & Location NFPA 72 allows 2 ways to comply The installation of smoke alarms or fire alarm systems or combinations of these shall comply with the requirements of this chapter and shall satisfy the minimum requirements for number and...

L1-02B-21- Ionization Dual Chamber Detector

L1-02B-21- Ionization Dual Chamber Detector A dual-chamber detector utilizes two ionization chambers; one is a sensing chamber that is open to the outside air. The sensing chamber is affected by particulate matter, humidity, and atmospheric pressure. The other is a...

L1-02B-20- Ionization Dual Chamber Detector

L1-02B-20- Ionization Dual Chamber Detector Changes in humidity and atmospheric pressure affect the chamber current and create an effect similar to the effect of particles of combustion entering the sensing chamber. To compensate for the possible effects of humidity...