Optical smoke detector in threshold alarm technology that detects smoke according to the scattered-light principle. The detectors feature an alarm indicator on the detector head that is visible from all angles, and which can be triggered with a permament magnet for test purposes. A detector base is provided for mounting and cable connection purposes into with an detector is simply screwed in via the bayonet connection. Each detector is equipped with an alarm LED, which displays the storeda alarm in the event of an a alarm. Detector/base diameter: 110 mm. Vds approved.