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The Steinel Presence Detector Dual HF KNX V3.1 is ideal for indoor passageways and long corridors, with fitting heights up to 3.5 metres. Its dual-direction sensor detects movement up to 20 metres away, whatever the temperature, even through glass, wood or stud walls. The digital bus controls four lighting channels and heating, ventilation and air conditioning, while lights switch on almost instantly.
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