seismograph, hydrophone, sonde, inclinometer, anemometer, bolometer, seafloor, transmitter, seismology, dipole moment, observatory, toroid, telescope, radiometer, echo sounder, polarimeter, voltmeter, denali fault, geomagnetism, deimos, dropsonde, radiosonde, interferometer, geophone, spectrographic, cryostat, spectrometer, geodetic, directional antenna, sensor, photometer, spectroscope, detector, manometer, magnetometer, klystron, dipole, cosmic ray, gradiometer, antennae, buoys, optical telescope, electromagnet, retroreflector, telemeter, compressional, temperature gradient, monopoles, resonant cavity, backscattering, acoustic impedance, stratovolcano, calorimeter, ultracentrifuge, heinrich hertz, spectroscopic analysis, bathymetry, airglow, dipole antenna, volcanoes, spectro, transducer, altimeter, stud finder, tuning fork, ionosphere, astrometry, fluorometer, oximeter, circular polarization, theodolite, pyrometer, antineutrino, minos, tectonics, josephson junction, magnetic flux, millibar, crustal, mossbauer, astron, goniometer, newtonian telescope, azimuthal, isotherm, reflectometer, astronomical telescope, reflector, microbalance, soliton, anechoic chamber, enthalpy, electrostatic generator, resonator, earthquakes, meteoroid, ross ice shelf, seismologic, penetrometer, karabiner, seamount, armillary sphere, seismometers, galvanometer, seismographs, sonar, accelerometer, dynamometer, antenna, conveyor, galvanometers, accelerometers, antennas, collimator, gyro, lathe, magnetometers, micrometer, sampler