IR Quattro HD-2 recessed ceiling presence detector COM1 with infrared sensors and a wide range of functions The IR Quattro HD-2 recessed ceiling presence detector from Steinel offers 360° presence detection and can be networked wirelessly via Bluetooth. Made of high-quality plastic, the detector has four infrared sensors, all of which can be individually selected and deselected. IR Quattro is available for the COM1 interface and offers presence and brightness functions as well as temperature and humidity measurement via the COM1 interface. This makes the modern presence detector a real all-rounder, regardless of whether it is used in a sports hall, office or underground car park. The recessed ceiling version of the IR Quattro has a modern yet understated design - 360° detection angle - Infrared sensors can be individually selected and deselected - Compatible via COM1 - 5,200 switching zones - Wireless networking via Bluetooth - Tangential range 24 x 24 m (576 m²) - Installation height max. 10 m