Spectrometer: (1) It is a type of spectroscope suitable for the precise measurements of refractive indices. (2) An instrument for measuring the energy distribution of a particular type of radiation.
Speedometer: is an
instrument which indicates speed at which a vehicle is moving.
Spherometer: is an
instrument for measuring curvature of surfaces.
Sphygmomanometer: an
instrument used for measuring arterial blood-pressure.
Sphygmophone: an
instrument, with the help of which a pulse beat makes a sound.
Sphygmoscope: an
instrument, by virtue of which, arterial pulsations become visible.
Stereoscope: It is a special type of binocular, through which a double photograph snapped from two different angles by a two-lensed camera is viewed in solid relief.
Stethoscope: is an
instrument to hear and analyse movements of heart and lungs.
Stop watch: for
recording small intervals of time in the laboratory, in races and other events.
Stroboscope: is an instrument for viewing objects moving rapidly with a periodic motion and to see them as if they were at rest.
Tachometer: is an
instrument for determining speeds of aeroplanes and motor boats.
Telephone: a device by virtue of which two persons at two different places can communicate. It consists of two main parts (i) a microphone and (ii) a receiver.
Teleprinter: an instrument which prints automatically messages sent from one place to another, on telegraph lines.
Telescope: is an
apparatus used for observing distant objects.
Theodolite: is an
instrument for measuring horizontal and vertical angles.
Thermocouple: an
instrument based on thermo-electricity used for measuring temperatures.
Thermometer: is an
apparatus used for measuring temperature.
Thermostat: It is an
instrument used to regulate the temperature to a particular degree.
Viscometer: is an
instrument to measure viscosity.
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