OPTICAL BEAM SMOKE DETECTORS BARRIER AND REFLECTION

EDS Optical Beam Smoke Detectors are an optimal choiche in terms of 
quality, reliability and cost effectiveness 

barrier - transmitter TX and receiver RX 
are separated and are installed on opposite walls

reflection - transmitter TX and receiver RX 
are enclosed in a single box 

obscuration principle - it detect the attenuation 
of the signal level by smoke

turbulence principle - it detect the movement 
of smoke clouds and hot air bubbles (heat effect)