The TFM100S from Billingsley Aerospace and Defence is a Magnetometer that has a measurement range of ± 100 µT and an accuracy of +/- 0.5 % of full scale. This fluxgate magnetometer has a sensitivity of 100 μV/nT and a linearity of 0.015% of full scale. It has a radiation tolerance of greater than 100 kRADs (with 0.79 mm cover) and 300 kRADs (with 1.59 mm cover). The magnetometer requires a supply voltage of 15-45 V and a current of 20 mA. It has a mass of 166-200 g and measures 36.6 x 35.8 x 154.4 mm. The TFM100S magnetometer is ideal for spacecraft attitude control applications.