LST Smoke Alarm 2251CTLE User Manual

Multi-criteria Detector

2251CTLE – COPTIR

• 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.

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