Abstract: A smoke detector contains a radiation source for transmitting an illuminating radiation having a time sequence of radiation pulses, a radiation detector for receiving measurement radiation impinging on the radiation detector after at least partial scattering of the illuminating radiation, an amplifier circuit for amplifying an output signal of the radiation detector, an analog to digital converter having a sample and hold circuit for converting an analog output signal of the amplifier circuit into a digital measurement value, and a control device coupled to the radiation source and the sample and hold circuit. The control device is equipped for controlling the radiation source and the sample and hold circuit such that the time of a sampling point in time of the sample and hold circuit relative to a radiation pulse depends on the duration of the radiation pulse. A method for calibrating the described smoke detector is also revealed.

Abstract: A danger sensor (100) is described which features a first housing part (110), a second housing part (120), a detector unit (112) for detecting of a danger situation, wherein the detector unit (112) is arranged in or at the first housing part (110), and an electrical connection (114a, 114b) for connecting of at least one supply element (142a, 142b) which provides electric power to the detector unit (112) during operation. The first housing part (110) together with the second housing part (110) is designed so that a holding area is present between the two housing parts (110, 120) for the at least one supply element (142a, 142b), and that the volume of the holding area is variable by means of a volume adjustment element (130). Furthermore, an element (130) is described for adapting a danger sensor to different requirements regarding the power supply; also described is an arrangement for detecting of a danger situation and a method for retrofitting of the power supply to a danger sensor (100).

Abstract: A smoke detector contains a radiation source for transmitting an illuminating radiation having a time sequence of radiation pulses, a radiation detector for receiving measurement radiation impinging on the radiation detector after at least partial scattering of the illuminating radiation, an amplifier circuit for amplifying an output signal of the radiation detector, an analog to digital converter having a sample and hold circuit for converting an analog output signal of the amplifier circuit into a digital measurement value, and a control device coupled to the radiation source and the sample and hold circuit. The control device is equipped for controlling the radiation source and the sample and hold circuit such that the time of a sampling point in time of the sample and hold circuit relative to a radiation pulse depends on the duration of the radiation pulse. A method for calibrating the described smoke detector is also revealed.

Abstract: A danger sensor (100) is described which features a first housing part (110), a second housing part (120), a detector unit (112) for detecting of a danger situation, wherein the detector unit (112) is arranged in or at the first housing part (110), and an electrical connection (114a, 114b) for connecting of at least one supply element (142a, 142b) which provides electric power to the detector unit (112) during operation. The first housing part (110) together with the second housing part (110) is designed so that a holding area is present between the two housing parts (110, 120) for the at least one supply element (142a, 142b), and that the volume of the holding area is variable by means of a volume adjustment element (130). Furthermore, an element (130) is described for adapting a danger sensor to different requirements regarding the power supply; also described is an arrangement for detecting of a danger situation and a method for retrofitting of the power supply to a danger sensor (100).