Model NumberAW-BK901
Standard :ComplianceEN54-12
Fire Detection and Alarm Systems :BS 5839 Part 1:2002
Operating Voltage :20 V to 28 V DC
Current ParametersStandby:23mA

Commission:40mAAlarm:33mA

Beam Sensor Sensitivity : 

Level 1: 2.6 dB High Sensitivity
Level 2: 3.4 Medium Sensitivity
Level 3: 4.8 dB Low Sensitivity

Beam Path Angle :±0.5ºDirectional
LED Indicator GuideRed: Fire ; Yellow: Fault ; Green: Alignment

Reset Time :Less than 2 Second

Dimension / Weight

L:190.87 x W:126.87 x H:91.96 mm / 440 gm

Weight0.130 Kg with base

The AW-BK901 reflective optical beam smoke detector incorporates a light transmitter and the detector on the same unit. The light path is created by reflecting light emitted from the transmitter off a retro-reflector, meaning it is reflects light back to its source with a minimum of scattering, which is placed opposite the detector.

In a fire, when smoke falls within the path of the beam detector, some of the light is absorbed or scattered by the smoke particles. This creates a decrease in the received signal, leading to an increase in optical obscuration. This unit decodes or analyzes received signals and compares to the pre-programmed algorithm stored on the processor. Through this algorithm the detector will decide whether fire is defined or not and lead to enablement the corresponding relays and LED indicators. The unit on the operating mode maintaining continually emitting light, care should be taken that the activities in the space do not obstruct the beam or move the device to avoid false operation of the detector.