Fike Sita Conventional Fire Protection

The specifiers and the installers who choose the Multipoint detector do so secure in the knowledge that the fire detection performance of the detector can be matched to the environment in which it is installed –and changed at any time during the lifetime of the installation. With the Sita 200 plus System, a high technology approach has been adopted, with a microcomputer in each detector implementing a large degree of distributed intelligence. The system can support 200 Multipoint combined detectors/sounders on a single loop. Each one not only provides detection but also the option of a built-in sounder. Integrity of the system is maintained by way of a built-in isolator in each device. The Rafiki Sita system intelligence has been harnessed in such a way that the equipment used is very easy to install, commission, and maintain. The system has been designed to high specification and quality standards and is intended to fully comply with the new EN54 -2 and EN54 - 4 standards and EU directives. Rafiki Multipoint Sita - Main Features Fast short circuit isolator in every device; 15 combinations of smoke & heat detection modes; Multi-stage alarms - pre-alarm feature; 7 sound patterns - plus off, 3 different volume settings – if using Sita Multipoint with integral sounder; Auxiliary digital inputs and outputs are available at any Addressable Multipoint device; Automatic continuous self-calibration; Addressable Multipoint detector is monitored for all failures of the sensor chamber - a warning is indicated when a smoke detector head requires servicing; Maintenance is made easy with the unique disposable optical chamber, designed as a cost-effective solution to cleaning and re-calibration; All modes are compliant with European detector-type specifications, and are suitable for use in installations compliant with BS5839: Part 1: 2002; More details about the Rafiki Multipoint: eliminate the false alarms; more on the Rafiki detectors; The Multipoint Detector; new Multipoint ASD detectors, and the modes of detection. Rafiki Multipoint Sita - Modes of detection SMOKE 1: Highly thermally enhanced optical Used where ionization detectors are normally fitted, especially when there are high ceilings or risk of free-burning fires SMOKE 2: Thermally enhanced optical Used where optical detectors are normally fitted, when there is a risk of a smoldering fire and for escape routes. SMOKE 3: Thermally enhanced optical with pulse rejection Used where optical detectors are normally used in positions exposed to brief concentrations of water vapor or smoke e.g. from a bathroom, kettle etc. HEAT 1: Rate of rise to 58°C Used where a standard rate of rise detector would normally be used HEAT 2: Low fixed temperature 58°C Used where a standard fixed temperature heat detector would normally be fitted, suitable for kitchens, etc HEAT 3: High fixed temperature 90°C Used where a high fixed temperature heat detector would normally be fitted, suitable for boiler rooms, etc. Combinations Any combination of smoke and heat modes may be selected, and differing alarm responses selected for each mode. If the Multipoint with an integral sounder is required, then it too can be set to a choice of 7 different sound patternsBuy Fike Fire Detectors at Sparks

This article is the continuation of the, new Multipoint ASD detectors from Rafiki(short introduction) previously posted on our blog. Via this article you can find out more about the automatic calibration and the modes of detection offered by the Rafiki MultiPoint detectors (heat and smoke detection modes). All modes are compliant with European detector type specifications, and are suitable for use in installations compliant with BS5839: Part 1: 2002, Part 6 2004 if used in conjunction with a "Twinflex Plus" system. The Twinflex Intelligent conventional detector can be set to any one of the smoke or heat detection modes as well as a Combined Mode (Smoke 2 & Heat 2) where a smoke or heat source can trigger a fire decision. This means the end user is given optimum fire protection, even if the installer is unsure of the use of the particular area where the detector is sited. As part of the Twinflex system, all the Twinflex products including the Twinflex Multipoint detector feature an End of Line monitoring switch, which negates the need to install End of Line monitoring resistors. The Sita Intelligent addressable detector is able to offer all the choices for detection or a combination of any listed to give a choice of up to 15 different settings. It is set via a PC when programming the system. The Sita Multipoint also has an in-built loop isolator as well as an input/output facility for local control and switching. The Multipoint Detector also has the unique benefit of an optional full-specification integral sounder. A 90dBA output can be achieved. The Twinflex Intelligent two-wire detector can be set to 3 different sound patterns, as well as switched off, with 2 sound output levels. The Sita Intelligent addressable detector has 7 different sound patterns and 3 volume settings. Automatic Calibration To ensure the detection capabilities of the Multipoint are never compromised it self-calibrates every 6 hours. It continuously monitors for dust contamination, until, over a period of time, depending on the environment, it reaches a point where the chamber becomes saturated. Before this can develop into a false alarm situation, the panel will indicate that a Multipoint needs attention on both the Twinflex and Sita systems. To make maintenance easy, the Multipoint features a disposable optical chamber. This means the chamber can be simply thrown away, and replaced economically when necessary. Rafiki Multipoint Reflected Optical Value The Rafiki MultiPoint detector - modes of detection Smoke 1: Used where ionization detectors are normally fitted especially when there are high ceilings or risk of free burning fires (chemical stores etc), or fires that need to be detected extremely quickly. Smoke 2: Used where optical detectors are normally fitted when there is a risk of a smoldering fire and for escape routes. Smoke 3: This setting is designed for use in areas that are prone to nuisance alarms. The reduced sensitivity linked with a time delay feature means that a higher concentration of smoke needs to be present for a constant time period, before a fire decision is made (Fig 1). This setting, for example, is ideal for hotel bedrooms with ensuite shower rooms, the end user can change the setting from smoke 2 to smoke 3 if nuisance alarms are becoming a problem – whilst still offering optimum protection of a smoke detection setting, especially if this is what has been specified. Heat 1: (Rate of Rise) Used where a standard rate of rise detector would normally be used Heat 2: (Standard Fixed Temperature - 58ºC approx) Used where a standard fixed temperature heat detector would normally be fitted, suitable for kitchens etc Heat 3: (High Fixed Temperature - 90ºC approx) Used where a high fixed temperature heat detector would normally be fitted, suitable for boiler rooms etc. You can read the previous article concerning the new Multipoint ASD detectors from Rafiki - or visit the Rafiki conventional fire alarms section on our website for more models and details. Most of the above specs are taken from the Rafiki Technical Sheet on, The New Multipoint ASD detector from Rafiki.Buy Fike Conventional Fire Alarms

There are extensive articles covering the Aico Domestic Fire / Smoke / Heat alarms, but not too much on one of the most prolific and popular range, the Apollo Smoke Alarms! We were recently announcing that the Apollo 65 range of Smoke / Heat detectors is back - and here we are with some more useful information concerning how things work in these smoke detectors. There are several types of detecting methods when it comes to the Smoke and the Heat alarms - the Optical, the Ionisation, and the Heat detection. Below you can find a little about each one of the first two of these methods - how do they work and how does the Apollo Series 65 work. How does the Apollo series 65 Ionisation Smoke Detector work? The sensing part of the Series 65 Apollo ionization smoke detector consists of two chambers - an open, outer chamber and a semi-sealed reference chamber within. Mounted in the reference chamber is a low-activity radioactive foil of Americium 241 which enables current to flow between 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 voltage measured at the junction between the two chambers. The voltage increase is monitored by the electronic circuitry which triggers the detector into the alarm state at a preset threshold. An externally visible red LED lights up when the detector changes to an alarm state. An integrating ionization detector, suitable for use in areas where transient levels of smoke may be expected, is also available. How does the Apollo 65 Optical Smoke Detector work? The Apollo series 65 optical smoke detectors incorporate a pulsing LED located in a chamber within the housing of the detector. The chamber is designed to exclude light from any external source. At an angle to the LED is a photodiode which normally does not register the column of light emitted by the LED. In the event of smoke from a fire entering the chamber, the light pulse from the LED will be scattered and hence registered by the photo-diode. If the photo-diode “sees” smoke on the two following pulses, the detector changes into the alarm state and the indicator LED lights up. The detector housing is identical to that of the ionization detector but has an indicator LED which is clear in a quiescent state but produces red light in alarm. [you can get this information from the PDF brochure that Apollo makes available, Apollo Series 65, and if you want to purchase these devices, please visit the Conventional Smoke Alarms section]Buy Apollo Smoke Detectors at Sparks

It used to be that everyone had an Apollo Fire / Smoke Alarm - they were the most popular conventional alarms and the most installed alarms. But now with the rise of so many other manufacturers within the UK, the Apollo fire alarms had a relative decrease in popularity. Still, here they are back with the Apollo Series 65 conventional smoke alarms and fire alarms! This range is composed of a wide voltage conventional fire detectors: ionisation smoke detectors, optical smoke detectors, heat detectors, and a wide range of bases. The Apollo Series 65 fire alarms has been developed from the highly successful Series 60 range of conventional detectors. The fire detectors and heat detectors in the Series 65 incorporate well-proven sensing technologies, together with advances in materials and electronics technology - including an IC based on that used in XP95 analogue addressable detectors. With a wide operating voltage - 9-33V - this series of detectors can be integrated into security systems - when used with a relay base. Also, the Apollo Series 65 wide voltage range consists of ionization, integrating ionization and optical smoke detectors, 4 grades of heat detector and a range of bases. The detectors in series 65 are identical in their appearance to series 60. Each type of detector is available in three versions - the standard version, the version with an LED which flashes continuously in quiescent mode, and one with both a flashing LED and a magnet-operated test switch(reed relay). Apollo Series 65 conventional alarms - main features Wide operating voltage; Advanced electronic technology; Flashing LED option; Magnetic test switch option; Can be used on security systems; Electrically compatible with Apollo Series 60; Mechanically compatible with Apollo Series 60; Proven detection performance; Tested and approved to EN54-7:2000(optical and ionization smoke detectors) and EN54-5:2000(heat detectors). Apollo Series 65 Fire Alarms and Smoke Detectors - on our website The FX343 Apollo Series 65 Optical Smoke Detector 55000-317 The FX344 Apollo Series 65 Heat Detector, A1R Rate of Rise Heat detector Apollo 55000-122Buy Apollo Series 65 Conventional Alarms