The 67-1033 ionization smoke detector utilizes two bi-colored LEDs for status indication purposes. In a normal standby condition the LEDs flash green approximately once each second. When the detector senses smoke and goes into alarm the status LEDs will latch on red. A single radioactive source of Americium-241 ionizes two chambers within the detector, a reference chamber, and the smoke sensing chamber. The air is ionized by this source and a small DC current flows between the electrodes of each chamber. Smoke can freely enter the sensing chamber while the inner chamber is virtually sealed to smoke. Smoke entering the sensing chamber causes a reduction in the DC current flow, the voltage imbalance between the two chambers is proportional to the smoke density. When the voltage differences become great enough it causes the detector to go into alarm. The two chamber design is utilized to compensate for changes in atmospheric and environmental conditions.
با کارايي ذره گيري 94% (تا 10 برابر حدمجاز تماس شغلي) جهت كار در محيطهاي داراي گرد و غبار مناسب مي باشد.مدل آن تاشونده و تخت است و به راحتي قابل نگهداري در جيب بوده و ساير مشخصات فني آن در کاتالوگ پيوست ارائه شده است.
LFB series bells are intended for fire alarm application only. The gong is of cast alloy metal suitable to produce loud and standard alarm bell sound. Two gong sizes are available to suit high or low noise level applications.
The LF-HD-4112 Conventional Type Heat Detector identifies fire with both rapidly rising and gradually increasing temperature. It has three levels of fixed temperature settings to adapt itself to the local temperature of the area being protected.