THE LINEAR BARRIER SAFE EYE The gas linear detection

DEFINITION SAFE EYE is a continued and integrated detection system in order to measure gas concentration on an imaginary line that links 2 points: -the transmitter on the one hand -the receptor on the other hand Theory based on the BEER-LAMBERT Law: Ln I/Io=  c l

SENSITIVITY example IR BAND: UV BAND: Scale: 0 to 2 LEL for paraffins CxHy (1< x<8) Example: 0,04% vol C3H8 over 100 m or 0,44% vol over 10 m; 4,4% vol over 1 m. UV BAND: For aromatics and H2S including the benzene, the xylene,the toluene, ammonia Scale: 100 to 800 ppm.m according to the type of gas

THE EMITTER Flame-proof housing with emitted UV and IR sources following a discharge from an electric arc in a gas tube 5 to 60 times per minute. Controlled flashing pulsations frequency (identification of parasitic rays )

THE RECEPTOR Flame-proof casing with 2 detectors:  IR in the band 3 to 3,5 µm (paraffins)  UV in the band 0,2 to 0,3 µm (aromatics) 2 averaged signals of analysis and of reference OUTPUT: 4-20 mA, 2 relays, 1 bus RS 485

CHARACTERISTICS  Zero and sensitivity drifting automatic compensation  High sensitivity  Long range  Rapid response time  Important immunity to false alarms (sun, reflections)  Easy digital communication  Integrated automatic test  High resistance to hostile environments. Protectors.  Anti-dust screen with air flow protection ( in option)  Heating of optics  Supports 70 % of opacity  Zero and sensitivity drifting automatic compensation

PROTECTORS

ALIGNMENT SYSTEM