SQUIDs are a type of magnetometer used both as survey and as laboratory magnetometers. Typical sensors include compasses, depth sensors, sidescan and other sonars, magnetometers, thermistors and conductivity probes. These effects are exploited in some types of magnetometers, EFNMR spectrometers, and MRI imagers. This usually not an issue since 3 component magnetometers often include accelerometers. Instruments included an antenna dish, cameras, spectrometer, infrared sounder, magnetometers (MISCHA) and plasma probes. Hall effect sensors provide much lower measuring accuracy than fluxgate magnetometers or magnetoresistance-based sensors. The science package may include magnetometers, particle detectors and, possibly, an imaging camera. Simple magnetic sensors have been superseded by total-field magnetometers. Fundamental space weather monitoring data are provided by ground-based magnetometers and magnetic observatories. Saturation is also exploited in fluxgate magnetometers and fluxgate compasses. Caesium vapour is used in many common magnetometers. Using three orthogonal magnetometers, both azimuth and dip (inclination) can be measured. The magnetic moments of objects are typically measured with devices called magnetometers. The SERF magnetometers only operate in small magnetic fields. Non-magnetic electronic hipchain triggers were developed to trigger magnetometers.