Kidde-Fenwal -27121特殊场所感温探测器（感温棒）

美国原产Kidde-Fenwal感温探测器,具有UL，FM认证。尤其适用于危险等级高，环境较差的场合，用于启动固定灭火系统之前的温度探测，同时结合了定温和差定温的特点。零件标号27121的为平时为常开状态。

DETECT-A-FIRE® (D-A-F) detectors are the "heart" of many fire protection systems. The highly reliable D-A-F has been the standard for over 75 years. The D-A-F is used for signaling overheat or fire conditions. In the vast majority of applications, the D-A-F provides the initial heat sensing that is used to activate suppression systems using clean agent, CO2, inert gases, wet or dry chemicals or water. D-A-F detectors are widely accepted, because they are designed with rate compensation. This provides a unique advantage over both fixed temperature and rate-of-rise types of detectors because the D-A-F detector accurately senses the surrounding air temperature regardless of the fire growth rate. At the pre-determined set point, the system is activated. Fixed temperature detectors must be completely heated to alarm temperature and therefore a lag in response time may occur with a fast rate fire. Rate-of-rise devices, on the other hand, are triggered by the rate of increase in ambient temperature and are subject to false alarms caused by harmless, transient thermal gradients such as the rush of warm air from process ovens.

DETECT-A-FIRE®（D-A-F）探测器是许多消防系统的“心脏”。高度可靠的D-A-F已经成为75年来的标准。D-A-F用于发出过热或火灾情况的信号。在绝大多数应用中，D-A-F提供初始热传感，用于使用清洁剂、CO2、惰性气体、湿或干化学品或水来激活抑制系统。D-A-F探测器被广泛接受，因为它们被设计成具有速率补偿。这提供了相对于固定温度和上升速率类型的检测器的独特优势，因为D-a-F检测器准确地感测周围空气温度而与火灾增长速率无关。在预先确定的设定点，系统被激活。固定温度探测器必须完全加热到报警温度，因此快速火灾可能会出现响应时间滞后。另一方面，上升速率装置由环境温度的上升速率触发，并受到无害的瞬态热梯度（如工艺烘箱中的热空气）引起的假警报的影响。

探测器灵敏度的关键在于设计。外壳是由一种快速膨胀的合金制成的周围空气温度的变化。内部支柱由膨胀较慢的合金制成。设计用于抵抗热能

吸收和密封在外壳内部，支柱跟随温度变化更慢。

No：27121

美国原产Kidde-Fenwal 感温探测器,具有UL，FM认证。

尤其适用于危险等级高，环境较差的场合，用于启动固定灭火系统之前的温度探测，同时结合了定温和差定温的特点。

零件标号27121的为平时为闭式状态。具有以下温度可选择：

140华氏温度℉= 60摄氏度℃

160华氏温度℉=71摄氏度℃

190华氏温度℉=87摄氏度℃

210华氏温度℉=99摄氏度℃

225华氏温度℉=107摄氏度℃

275华氏温度℉=135摄氏度℃

325华氏温度℉=162摄氏度℃

360华氏温度℉=182摄氏度℃

450华氏温度℉=232摄氏度℃

500华氏温度℉=260摄氏度℃

600华氏温度℉=315摄氏度℃

725华氏温度℉=385摄氏度℃