Zeta FE02000 conventional photoelectric smoke detector fire alarm. The FEOE2000 is particularly suitable for detecting optically dense smoke, involving materials such as soft furnishings, PVC, plastic, foam, and all similar materials which produce small visible particles (0.5 to 10 μm). Technical specification: detector class: optical smoke; design standard: EN54 Pt 7; operating voltage: 9-33V DC; quiescent current: 65μA; alarm current @ 24V DC: 53mA Max; operating temperature: -10°C to +50°C; minimum continuous temperature: 0°C; maximum humidity: 95% RH non condensing; alarm condition: 2.4% obscuration per metre; coverage: 100m2; IP protection rating: IP 43; start-up time: 10 seconds.