SST - Model XP95 -Intrinsically Safe Ionization Smoke Detector
Full details of the principles of operation and electrical description are published in the XP95 Engineering Product Guide. Information on the performance of XP95 in adverse environmental conditions is also given in this guide. XP95 IS detectors have the same operating characteristics as the standard versions.
- onization Smoke Detector
- Intrinsically Safe
- Analogue Addressable Type
- For Hazardous Applications
The sensing part of the detector consists of two chambers -an open, outer chamber and a reference chamber within. Mounted in the reference chamber is a low-activity radioactive foil of Americium 241 which enables current to flow across the inner and outer chambers when the detector is powered up. As smoke enters the detector, it causes a reduction of the current flow in the outer chamber and hence an increase in the voltage measured at the junction between the two chambers. This analogue voltage signal is converted to a digital signal by the electronic circuitry and transmitted to the control panel on interrogation.The micro-processor in the control equipment then compares the signal with stored data and initiates a pre-alarm or fire alarm as smoke density increases. When a fire condition exists, the panel instructs the detector to switch on its indicator LED.
- Intrinsically safe Ionisation smoke detector
- Analogue addressable
- Designed for use in hazardous areaas