The IS IR3 Flame Detector is designed for harsh environments in either indoor or outdoor applications. It is sensitive to low frequency flickering IR radiation emitted from flames during combustion. The sensor operates even through a layer of oil, dust, water vapour or ice. These detectors have been approved by Baseefa to standards EN50014, EN50020 and EN50284. The requirements of Directive 94/9/EC, the Atmosphere Explosives ATEX directive have also been met. The IR Flame Detector signals an alarm state by switching an alarm latch on, increasing the current drawn from the supply from 8mA to 28mA and closing the contacts of a Fire relay RL1. These signals from the detector are recognised by the control panel as an alarm signal. The alarm current also illuminates the detector integral red LED. A Fault relay RL2 closes its volt free contacts if the detector has no faults and the supply voltage to the detector is the correct value. To ensure correct operation of the detector the control panel must be arranged to supply a maximum of 30V DC and a minimum of 14V DC in normal operation. To restore the detector to quiescent condition after indicating a fire, it is necessary to extinguish any flames in view and interrupt the electrical supply to the detector for a minimum of one second. Removing the detector front cover provides access to the detector terminals and configuration DIL switch. The detector is normally configured to latch into an alarm state when a flame is in view. The configuration DIL switch within the detector can be set to place the detector into a non-latching mode. The detector can then also produce proportional analogue current alarm signals i.e. 8-28mA or 4-20mA (refer to Table 1). In non-latching mode the detector only produces an alarm signal when a flame is in view resetting itself to normal a few seconds after the flame has gone. The Intrinsically Safe (I.S.) Triple Infra-Red (IR) Flame Detector is designed to protect areas where open flaming fires may be expected. These detectors have high immunity to false alarms. They are sensitive to flickering, low frequency (1 to 15Hz) infra-red (IR) radiation emitted by flames during combustion. They will continue to function under the most difficult of conditions, even if the lens is contaminated by a layer of oil, dust, water, vapour or ice. The detector has three infra-red (IR) sensors which respond to different infra-red (IR) wavelengths in order to discriminate between flames and spurious sources of radiation. They are ideal for indoor or outdoor applications. Most IR flame sensors respond to 4.3m light, emitted by hydrocarbon flames. By responding to 1.0 to 3.0m IR emissions from fires almost all flickering flames can be detected. Gas fires not visible to the naked eye, for example hydrogen may also be detected. The I.S. IR Flame Detector has three IR sensors that respond to different IR wavelengths in order to discriminate between flames and spurious sources of radiation. False alarms due to such factors as flickering sunlight are avoided by a combination of filters and signal processing techniques. Flame detectors are used when detection is required to be unaffected by convention currents, draughts or wind; tolerant of fumes, vapours, responsive to a flame more than 25m away and fast reacting.

• · Applications Industrial premises Warehouses
• · Optical self test
• · Selectable response speed
• · Contacts – Fire/Fault, Pre alarm
• · Low power consumption
• · ATEX & IECEx certified: II 1 G
• · High optical interference immunity
• · Supply voltage 14 to 30Vdc
• · Operating Temperature -10 to 40C
• · IP65