Industrial Infrared Heat Detectors
The detectors of the HOTSPOT product series are equipped with thermal imaging cameras and detect all kinds of smoldering and open fires by infrared measurement technology and intelligent signal evaluation, even in the initial phase. The short response time of 100 milliseconds allows the monitoring of conveyor belts or other conveyor lines for moving pockets of embers.
The Hotspot can also be used in potentially explosive atmospheres. These are used with the Hotspot-X22 models; -X20; and -X0 covered.
HOTSPOT-1000 – Intelligent thermographic camera
The ADICOS HOTSPOT-1000 is an IR-fire detector with infrared-measuring devices and intelligent signal evaluation for the fast detection of all kinds of smoldering fires, also within their initial phase. The integrated thermal imaging detector comprises 1000 heat-sensitive pixels whose alarm thresholds can be freely parameterized. In this way, the HOTSPOT-1000 can be optimally adapted for the respective application environment and the de-tection target to be fulfilled.
The short response time of 100 milliseconds allows the monitoring of conveyor belts or other conveyor lines for moving pockets of embers. Furthermore, overheated drives, shaft bearings or rollers can also be detected. The HOTSPOT-1000 can be used in addition to the ADICOS-GSME fire gas detectors, as well as within silos for monitoring the bulk material stored.
Its robust design, as well as its standardized, integrated purge air connection, protects the HOTSPOT-1000 from dust, dirt and moisture. In addition to the infrared sensor, each HOTSPOT-1000 includes a conventional camera for alignment and orientation. For easy assembly in the desired angular position, a robust mounting foot with ball joint is available
IR-Detektion in explosionsgefährdeten Atmosphären
The detectors of the HOTSPOT product line are also available as variants which are either approved by the manufacturer‘s declaration for use in atmospheres subject to gas or dust explosions or certified in accordance with the ATEX directive and IECEx. Their robust design and small size make the detectors ideal for use in difficult assembly environments.
The HOTSPOT-X0 is the first IR-fire detector that has been approved worldwide for the potentially explosive gas atmospheres of zones 0 to 2. The innovative thermal camera allows for early fire detection in chemical parks and gas-fired power stations, as well as in all other areas in which potentially explosive gas atmospheres can occur. The Hotspot-X0 detects excess temperatures
and flames and supports several alarm zones by means of independent alarm parameters – this ensures the best possible adaptation of the detectors to the particular application. Its compact design allows its use also within confined spaces. HOTSPOT-X0 thermal cameras can directly be integrated in the fire alarm bus of central fire alarm systems.
The IR fire detector HOTSPOT-X20 is used in potentially explosive dust atmospheres. The detector is type-approved by a notified body in accordance with both the ATEX Directive and IECEx. The HOTSPOT-X20 has a resolution of 1000 heat-sensitive pixels and an integrated purge air connection, which protects the optics of the detector from contamination. Instead of the conventional camera, the HOTSPOT-X20 is equipped with, a flange for flush mounting of housings of every kind.
The IR-fire detector HOTSPOT-X22 is for use in the potentially explosive dust atmospheres, such as in coal-fired power plants, and is approved by a self-test with manufacturer‘s declaration for use in Zone 22 explosive dust atmospheres. The structure of the HOTSPOT-X22 is based on the HOTSPOT-1000 and offers the same functionality. The detector also has a conventional camera for alignment and orientation.
Monitoring of transported material
When transporting flammable goods on conveying systems in power stations, transshipment terminals or recycling plants, there is always a risk of spreading of hot spots. If sparks are introduced from damaged grinders or if material is delivered which is already inflamed, a reliable detection is to be carried out before storage. For that purpose, the use of infrared detector arrays is a proven method. Thanks to the quick speed of response combined with the high sensitivity and local resolution, near-surface smouldering can be detected.
The possible covering of a smouldering by non-burning material is to be taken into account. Although in such cases it is possible that the material positioned above consequently heats as well in such a way that a detection becomes possible on the visible surface, the detectors can be arranged in such a way that, for instance, the discharge parabola of a chute is monitored in order to ensure a reliable detection for the other cases as well. An alternative which is less prone to contamination is the positioning of two detectors immediately in front of and behind the chute. This arrangement utilises the fact that a hotspot which is probably hidden on the first belt is at least partly visible on the surface after transfer and therefore becomes detectable.
Inflammations may occur in case of plant defects or material jams on feed hoppers of conveying systems or grinders for flammable materials. In such cases, it is recommended to use a detector array as an alternative to expensive thermal cameras. The possibilities of a space-resolved alerting which comes along with that additionally allows moving mobile plant parts such as conveying cranes automatically away from the fire source.
Monitoring of plant damages
For early detection of plant damages, e.g. on conveying system in rooms with high ceilings, strong ventilation or outdoors, infrared detector arrays are used. In doing so, the focus in on damage scenarios like overheating drive rollers, motor overheating and dragging chains and belts. Thanks to the appropriate parameterisation of the individual array fields, the detector triggers in good time prior to an imminent plant overheating and, in addition, alerts in a differentiated manner in case of fire in the surroundings of the plant or if smouldering material is transported.
In any event however, it must be taken into account that only those objects are monitored which have “visual contact” to the detector. In case of large shadowing surfaces, detectors with different viewing angles should be installed where necessary.
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