Analysis chamber for ventilation and air conditioning ducts. Venturi tube operating principle. Single suction and exhaust air tube. Intelligent monitoring circuit that continuously checks and adjusts sensitivity for optimal functionality. Includes base connection TFBASE01. Can be mounted on either side of the duct. "FLOW" arrow for easy installation in the correct air flow direction. The arrow direction must match the air flow direction in the duct. The detector's housing, with cable entries and reset button, can be rotated in any direction to adapt to the installation location characteristics. Both the smoke detector chamber and the connection chamber covers feature snap closures for quick access. Two alarm relays, one service alarm relay, one low-flow alarm relay, one system fault relay. The detector has an intelligent monitoring circuit that continuously adjusts sensitivity for optimal functionality throughout its lifetime. If the detector can no longer compensate for contamination and approaches a false alarm, a service alarm will be triggered. The detector features a bayonet mount for easy installation and removal. Operating temperature: -20°C to +55°C. PC/ABS enclosure. Dimensions (L x H x W) 119 x 218 x 76 mm. Requires sampling tube TFTUBO-DUCT 60 or TFTUBO-DUCT 15. Protection class IP65. EN 54.27 certified.