LST Smoke Alarm 7251 User Manual

Optical Laser Smoke Detector

7251

• ADM loop technology with

System Sensor/200 protocol

• Up to 100 times more sensitive than

common optical smoke detectors

• Sensitivity selectable in 9 steps

• Optional pre-alarm function

• Automatic drift compensation

• Highly insensitive to contamination

• Function testable with magnet

Description

The addressable Optical Laser Smoke Detector 7251 The proven ADM loop technology with System Sen-

uses the scattered light principle, and was developed sor/200 protocol establishes a permanent communica-

for the precise detection of smoke particles in a wide tion between the ﬁre detection control panel and the

range of applications. The modern design of the sen- detector. That ensures a periodical function testing of

sing chamber allows to reliably evaluate the characte- the detector. In the control panel all types of ﬁres are

ristics of ﬁre.

detected by continuously comparing ﬁre patterns.

Due to the high sensitivity of the laser detection cham- The inﬂuence of contamination on the optical measu-

ber, the detector is ideal for applications where an early rement system is reduced with the help of the laser

ﬁre detection is crucial:

• Computer rooms

• Clean room manufacturing

• Hospitals

principle and furthermore compensated for by using in-

telligent evaluation algorithms. With that, the response

sensitivity of the detector is kept constant for a long

time – a further effective step to avoid false alarms.

• Aspiration smoke detection systems

The two LEDs with 360° visibility indicate the activated

Depending on the application, the high sensitivity of the condition of the detector. The detector address is selec-

detector is individually adjustable in 9 steps between ted with two decadic rotary switches, thus allowing to

0.03%/m and 3.3%/m and provides a number of spe- quickly change the detector without additional tools.

cial applications, which can not be covered using stan-

dard optical smoke detectors.

A detector function test can be conveniently conducted

An optional pre-alarm can be activated two sensitivity using a magnet. The detector can be attached to va-

levels before reaching the alarm level.

rious bases and it can be protected against theft.

Building Safety. Building Security.

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