Multi-sensor for smart home Busch-Jaeger 6131/30-24 — motion detection, range 16 m, IP20

Busch-Jaeger 6131/30-24 is a ceiling-mounted multi-sensor for smart homes that detects presence and motion to control lighting and automate functions. It supports two independent channels and a constant light function for brightness-dependent switching of up to two separate light circuits. The device integrates a KNX bus coupler and is designed for installation in false ceilings with board thickness from 9 to 25 mm; a Ø68 mm hole is required. Detection range is circular and depends on mounting height: for seated persons the maximum diameters are 8 m (2.5 m mounting), 10 m (3 m) and 14 m (4 m); for walking persons the maximum diameters are 10 m, 12 m and 16 m respectively. Visible height of the unit is 23 mm and the product is rated IP20.

Advantages

The multi-sensor combines presence and motion detection with brightness-dependent control across two channels, allowing separate switching or dimming of two light bands. Integrated KNX connectivity simplifies integration into home automation systems. Compact design for recessed or surface mounting and compatibility with common installation housings provide flexible installation options. The sensor offers monitoring functions and two-stage power-off behaviour for tailored energy management.

Suitable for

Key specifications

How to use

Install the sensor in a ceiling opening of Ø68 mm or use a recommended installation housing (e.g., Kaiser HaloX-O Art.no. 1290-40 or IBTronic H120-68) and appropriate cover plate. Ensure the false ceiling board thickness is between 9 and 25 mm for recessed installation. Connect the device to the KNX bus and to the lighting circuits following KNX wiring standards and the manufacturer's instructions. Configure the two channels and constant light parameters via the KNX interface or the commissioning software to set brightness thresholds, presence detection behavior and two-stage power-off timings.

Recommendations

For reliable detection, mount the sensor at the recommended heights (2.5–4 m) and orient it centrally over the monitored area. Use the device for interior applications only (IP20) and select appropriate installation housings for concrete or plaster ceilings as suggested by the manufacturer.