The invention relates to a scalar magnetometer comprising a sensor element (NVD), a circuit carrier (GPCB), a pumping radiation source (PLED), a radiation receiver (PD), and analysis means (ADC, IF). The pumping radiation source (PLED) emits pumping radiation (LB). The sensor element (NVD) comprises preferably one or more NV centers in diamond as paramagnetic centers. The aforementioned paramagnetic center of the sensor element (NVD) emits a fluorescence radiation (FL) upon being irradiated with pumping radiation (LB), the intensity of said fluorescence radiation (FL) of the paramagnetic center being based on the magnetic flux density B at the location of the paramagnetic center. The radiation receiver (PD) converts the intensity signal of the fluorescence radiation (FL) into a receiver output signal (SO), and the analysis means (ADC, IF) is suitable for and designed to detect, store, and/or forward the value of the receiver output signal (SO) as a measurement value. The material of the circuit carrier (GPCB) is preferably transparent to the pumping radiation (LB) in the radiation path between the pumping radiation source (PLED) and the sensor element (NVD) and to the fluorescence radiation (FL) in the radiation path between the sensor element (NVD) and the radiation receiver (PD). The sensor element (NVD), pumping radiation source (PLED), radiation receiver (PD), and analysis means (ADC, IF) components are preferably mechanically secured to the circuit carrier (GPCB).
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