Instrument |
Use |
Sextant |
Used by navigators to find the latitude of a place by measuring the elevation above the horizon of the sun or another star; also used to measure the height of very distant objects |
Spectroscope |
To observe or record spectra |
Spectrometer |
Spectroscope equipped with calibrated scale to measure the position of spectral lines (Measurement of refractive indices) |
Spherometer |
Measures curvature of spherical objects |
Sphygmometer |
Measures blood pressure |
Stereoscope |
To view two-dimensional pictures |
Stethoscope |
Used by doctors to hear and analyze heart and lung sounds |
Stroboscope |
To view rapidly moving objects |
Tachometer |
To determine speed, especially the rotational speed of a shaft (used in aeroplanes and motor-boats) |
Galvanometer |
Measures the strength of direct current |
Telemeter |
Records physical happenings at a distant place |
Teleprinter |
Receives and sends typed messages from one place to another |
Telescope |
To view distant objects in space |
Thermometer |
Measures Temperature |
Thermostat |
Regulates temperature at a particular point |
Tonometer |
To measure the pitch of a sound |
Transponder |
To receive a signal and transmit a reply immediately |
Udometer |
Rain gauge |
Ultrasonoscope |
To measure and use ultrasonic sound (beyond hearing); use to make a Ecogram to detect brain tumours, heart defects and abnormal growth |
Venturimeter |
To measure the rate of flow of liquids |
Vernier |
Measures small sub-division of scale |
Viscometer |
Measures the viscosity of liquid |
Voltmeter |
To measure electric potential difference between two points |
Wattmeter |
To measure the power of an electric circuit |
Wavemeter |
To measure the wavelength of a radiowave |