Our sophsticated new EX system for use in hazardous atmospheres, introduces to the market a range of conventional intrinsically safe fire detectors. In addition to the unobtrusive size and styled shape of the new range, a number of new design features have been incorporated including single visit to the ceiling installation and a service and maintenance detector park position.
As each type of fire detector responds to a particular 'fire product' the relative speed of response of the detector is therefore dependant upon the type of fire being detected. The range of M600Ex detectors have been designed to provide the earliest possible warning of a fire condition, with a minimum possibility of false/unwanted alarms.
As smoke is normally present at an early stage in most fires, smoke type detectors (high performance optical and ion chamber) are therefore considered the most useful. When considering the type of smoke detector for the application, the probable type of fuel for the fire should be considered, in general terms, fast developing fires are detected quicker with ion chamber detectors. But for general fire detection, where there is an equal possibility of either 'fast' or 'slow' fire developing, the intelligent high performance optical detector provides an excellent detection response.
In situations where the installation of smoke detectors would cause an unacceptable level of false alarms, heat detectors may be installed. The M600Ex series provides a selection of heat detectors, from Rate of Rise to fixed temperature.
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High Performance Optical Smoke Detector MR601TEx
These detectors react to the whole range of fire products from slow smouldering fires, producing visible particles to open flaming fires producing large numbers of very hot smaller sized aerosols. It combines optical and heat detector technology to detect clear burning fire products which hiterto could only be easily detected by ion-chamber detectors.
For normal ambient conditions, the high performance optical detector behaves as a normal optical detecor. Only when a rapid rise in temperature is detected does the sensitivity of the detector increase and the presence of smoke will confirm a fire condition which will be transmitted as an alarm level.
Ion Chamber Smoke Detector MF601Ex
These detectors react to the visible and invisible fire aerosols (products of combustion) and are therefore capable of detecting the early presence of hot smouldering and flaming fires such as wood, paper, etc.
They are particularly suitable for general applications in all areas and use a dual ionisation chamber in which the air is ionised bu a single radioactive source (33.3k Bq Americium 241). The presence of smoke in the sampling chamber causes a change in the balance voltage between the two chambers.
Heat Detector MD601Ex and MD611Ex
These detectors use two networked thermistors in a bridge configuration to provide a fast response, that depends both on absolute temperature and rate of rise of temperature.
The rate of rise/fixed temperature heat detectors can be used in areas where smoke sensors are unsuitable due to environmental conditions (smoke, dust etc.). Such areas include kitchens, locker rooms, canteens, garages, loading bays etc.
Carbon Monoxide Fire Detector MU601Ex
The CO fire detector is a unique general purpose fire detector which provides very early warning of slow smouldering fires. Ideal for sleeping risks, the CO fire detector is also well suited to many applications where heat detection is insufficient but smoke detection causes false alarms. As CO travels more freely than smoke, the positioning of CO detectors is more flexible.
Enhanced Carbon Monoxide Fire and Heat Detector MDU601Ex
The MDU601Ex detector combines the features of both the MDU601Ex detector and the MD601Ex detector to provide a combined CO and rate-of-rise heat detector where the sensitivity of the CO detector is enhanced in response to a fast rate of change of temperature.
