Refocusing on Fire Detectors and Sensors

Technology helps lower risk


• Never paint smoke alarms. Paint, stickers, or other decorations could keep the alarms from working.

• Have battery backups in case of a power outage.

Technology Leads the Way

Professionally installed smoke detectors provide a level of safety which far exceeds any other installed method. A professionally installed fire alarm will provide centralized supervision, annunciation and remote monitoring/reporting features.

In addition, as fire professionals, security dealer integrators select the most appropriate type of detector for an application. Fire professionals can also determine the correct number of detectors required to achieve adequate protection. install the detectors in the most critical locations. and test detectors for proper operation once it is installed.

The technology is maturing and continues to make for more intelligent systems. Besides detectors' heightened levels of performance, manufacturers are supplying equipment to the trade which installs faster and requires less system infrastructure, as well as models adaptable to a wider variety of environmental and aesthetic requirements. Here are a few selections that illustrate technology advancements.

Adding CO Detection and Improve False Alarm Immunity

The FCP-500 flush mount smoke detectors from Bosch are UL listed, open area photoelectric smoke detectors designed to be used with commercial fire protective signaling systems and household fire warning systems. The FCP-500 is available as a photoelectric smoke detector or as a multi-sensor detector with an additional carbon monoxide (CO) sensor. The detectors are ideal for areas where increased levels of dust and fibers are expected. Each type is offered in white or transparent with color inserts.

The FCP-500 series smoke detectors satisfy the most demanding aesthetic requirements. Their ultra-low profile design offers flush ceiling mounting. The detectors and covers in the P versions are supplied with reversible printed color rings in 16 colors for individual color matching. All detectors in the FCP-500 series are equipped with two optical sensors and a contamination sensor.

The FCP-500-C multi-sensor detector also has a CO sensor. All sensor signals are constantly analyzed by the internal signal electronics and are linked with each other through specially developed algorithms. Linking the optical sensors and the CO sensor results in an extremely high tolerance to unwanted alarms.

The FCP-500 detector can be used in places where the work carried out gives rise to small amounts of non-fire related smoke, steam, or dust. The optical sensor operates according to the scattered light method. The LEDs transmit pulsed infrared light at a defined angle into the scattered light area.

If a fire occurs, the light is scattered by the smoke particles and strikes the photo diodes that transform the quantity of light into a proportional electrical signal. Interference effects from daylight and commercial lighting sources are filtered out with an optical daylight filter and by using electronic filtering and rectification algorithms. The detector's various diodes (light-emitting and photo) are individually controlled by the detector's electronics.

Note: CO sensor (C models only) is for detection enhancement only. It is not a CO detector and cannot activate an alarm in the presence of CO only. Without the presence of CO, the smoke sensor is half as sensitive to smoke as a standard commercial photoelectric smoke detector. This reduces false alarms. When the sensor detects CO, the detection chamber's sensitivity to smoke increases so it is equal to that of a standard commercial photoelectric smoke chamber.

The CO sensor is monitored by measuring the current generated by CO oxidation on an electrode. If the current lies outside the permitted range, the trouble relay activates. If this occurs, the detector continues to operate only as a scattered light detector.

The degree of contamination on the detector surface is continually measured by the contamination sensor. Heavy contamination of the detector surface causes a fault indication.