MIL-PRF-32224

Abstract

This specification covers the performance requirements for both ionization and photoelectric smoke sensors (see 6.8.10 and 6.8.12, respectively) and their universal bases and junction boxes, which are components of an overall Advanced Fire and Smoke Sensor System (AFSSS) for use on naval ships. These ionization and photoelectric smoke sensors, universal bases, and junction boxes may be of commercial-off-the-shelf (COTS) design, but must be rugged (see 6.8.15) enough to meet all of the requirements of this performance specification and the rigors of Navy shipboard service. Performance requirements for the other associated AFSSS components (e.g., heat sensors (see 6.8.9), flame detectors (see 6.8.7), Flame Detector Zone Modules (FDZM) (see 6.8.8), Switch Closure Zone Modules (SCZM) (see 6.8.20), isolators (see 6.8.11), and alarm panel (see 6.8.2)) are contained in their respective AFSSS specifications.<b><u>Intended Use:</u></b> The ionization smoke sensor is a sensing device that is effective at detecting submicron sized smoke particles from a small flaming fire but can also detect visible smoke from smoldering or flaming fires. The photoelectric smoke sensor is a sensing device that is effective at detecting larger, visible sized smoke particles from a smoldering fire but can also detect visible smoke from a flaming fire. Both ionization and photoelectric smoke sensors are considered early warning fire detectors and are used for life safety purposes. These sensors are two of several types of sensors used in the AFSSS and intended for use on Navy ships.<br>