An octagonal device about the size of a small toaster sits on a laboratory table before a worker wearing a white full-body covering in a clean room at NASA's Jet Propulsion Laboratory.
Source: NASA/JPL-Caltech
Published: May 17, 2022

Europa Clipper's magnetometer instrument will have three fluxgate sensors, one of which is shown in this image. During 50 or so flybys of Europa, the sensors will measure the strength and orientation of magnetic fields around the Jovian moon, to confirm the presence of Europa’s ocean, measure the ocean's depth and salinity, and measure the moon's ice shell thickness. The fluxgate sensors will be mounted along the spacecraft's 28-foot (8.5-meter) magnetometer boom.