Instruments and what it measures –
Ammeter – Measures strength of electric current.
Audiometer – Measures intensity of sound.
Anemometer – Measures force and velocity of wind and directions.
Galvanometer – measures electric current.
Fluxmeter – measures magnetic flux.
Endoscope – used to examine internal parts of the body.
Barograph – Records atmospheric pressure.
Bolometer – measures heat radiation.
Callipers – measures inner and outer diameters of bodies.
Voltmeter – measures electric potential difference between two points.
Wavemeter – measures the wavelength of a radiowave.
Viscometer -measures viscosity of liquid.
Pykometer – determines the density and coefficient of expansion of liquids.
Polygraph – records changes in heartbeat, blood-pressure and respiration.
Photometer – compares luminous intensity of the source of light.
Spectroscope – records spectra.
Spectrometer -measures the position of spectral lines.
Sextant -measures the height of very distant objects and also used by navigators to find the latitude.
Thermostat – regulates the temperature at a particular point.
Tonometer – measures the pitch of a sound.
Transponder – receives a signal and transmit a reply immediately.