Measurement Device: Device Used for Measuring Anemometer Speed of Wind Actinometer Heating power of radiation, solar radiation Ammeter Electric current in a circuit Audiometer Hearing loss Bolometer Power of incident electromagnetic radiation Barometer Atmospheric pressure Cathetometer Vertical distances Densimeter Specific gravity of liquids Dynamometer Force or torque Densitometer Optical density of a photographic film Electroencephalograph Electrical activity of the brain Electrocardiograph Electrical activity of the heart Elaeometer Specific gravity of oils Galvanometer Electricity Hydrometer Specific gravity of liquids Hygrometer Density of water in air Lactometer Specific gravity of milk Lysimeter Balance of water in soil Magnetometer Strength of magnetic fields Manometer Pressure Plastometer Flow properties of plastic materials Polarimetry Polarization of transverse waves, electromagnetic waves Spirometer Volume of air Spectrometer Properties of light in a specific portion of electromagnetic spectrum Seismometers Movement of Earth Surface Sphygmomanometer Blood pressure Thermometer Temperature Tensiometer Surface tensionof liquids Viscometer Viscosity of a fluid Voltmeter Electric potential, voltage