• ADM loop technology with
System Sensor/200 protocol
• Combines optical smoke sensor, heat
detector, infrared sensor and carbon
monoxide sensor
• Highest false alarm immunity
• Several sensitivity levels and thermal-
only mode selectable
• Constant response sensitivity
Description
The Multi-criteria Detector 2251CTLE incorporates four alarms, on the other hand fires are recognised quickly
separate detection units, allowing to determine the four and safely.
essential characteristics of fire:
• C – carbon monoxide
The multi-criteria detector can operate in difficult fields
of application, for instance
• OP – optically visible smoke
• T – temperature
• IR – infrared radiation
The typical patterns of fire are recognised by means
of intelligent analysis of the measured values of all four
detection units. That way on the one hand the detector
• workshops – e.g., welding shops, paint shops
• hotel rooms with steam formation in the bathroom
• smoking areas in bars or restaurants
• discotheques with fog generators
• garages or loading ramps
shows an especially high insensitiveness to unwanted and is therefore suitable for virtually universal use.
The optical measurement chamber uses the
scattered light principle to detect visible smoke
particles. The thermal unit responds to tempera-
ture changes within defined time intervals (rate-
of-rise principle according to class A1R) up to a
maximum temperature of 58°C.
Smouldering fires which spread out slowly can
also be detected early and safely by using the
durable carbon monoxide sensor. The infrared
sensor responds to the flickering of flames and
supports the detection of fires with low smoke
development (e.g., alcoholic fires).
The two LEDs with 360° visibility indicate the
activated condition of the detector.
0832–CPD–0518
Building Safety. Building Security.
A
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