Aperçu
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 ini- tial 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.
The key to the detector's sensitivity is in the design (Figure 1). The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner struts are made of a slower expanding alloy. Designed to resist thermal energy absorption and sealed inside the shell, the struts follow temperature changes more slowly.
Renseignements généraux
Nom : Kidde Fenwal 27021-0 Detect-A-Fire 360° Horizontal Flush Mount Heat Detector, Normally Open Contacts , Kidde Fenwal
Catégorie : Heat Detectors
UPC Code : 999999288903
Country of Origin : . Country of origin is subject to change.
Spécifications
Caractéristiques générales
ADI Numéro du produit : FN-12F271217
Code fabricant : 12-F27121-000-07-0T
Fabricant : Kidde-Fenwal, Inc
Gamme : DETECT-A-FIRE
Marque : Kidde-Fenwal
Modèle de produit : 27121-0
Nom de produit : DETECT-A-FIRE 27121-0 Temperature Sensor
Type de produit : Temperature Sensor
Caractéristiques de l'alimentation
Tension d'entrée : 120 V AC, 24 V DC, 48 V DC
Divers
Certification environnementale : RoHS
Respectueux de l'environnement : Yes