Duct detector chamber 6377 Features One-pipe air sampling system Uniguard Superflow Patented venturi pipe and duct housing Easy service and maintenance Test hole in cover The venturi pipes are available in 3 lengths; 0.6, 1.5, and 2.8 meter Venturi pipes with built-in fan Designed to comply with EN54-27 Specifications Operating temperature: - 10 to +50 °C Ambient humidity: < 95% Dimensions: 2280x187x184 mm Weight: 690 g (housing only)