In some cases, a presence detector installed at greater height just does the job better. Grässlin has these cases covered with its talis II PHB 360-20-1i. The device surveys a diameter of 20 metres from a height of up to 12 metres – it feels right at home in large halls, high-bay warehouses and the like. Its passive infrared sensor switches the connected electric consumer automatically depending on the ambient brightness and only when it detects that people are present. In this case, a remote control is more than a quality-of-life improvement – it’s absolutely necessary to allow for adjustments. This presence detector offers a high energy efficiency through regular light balancing and offline function when there is sufficient daylight.