Scientific Instruments:-

1.	Aerometer :	Instrument for measuring weight and density of air and gases.
2.	Altimeter :	Instrument used in aircraft to measure altitude.
3.	Ammeter :	Instrument used to measure electrical current flowing in a circuit.
4.	Anemometer :	Instrument to measure the force and velocity of wind.
5.	Audiometer :	Instrument to measure intensity of sound.
6.	Barometer :	Instrument used to measure the atmospheric pressure.
7.	Calorimeter :	Instrument used for measuring quantities of heat.
8.	Cardiogram :	A medical instrument for tracing heart movements.
9.	Crescograph :	Instrument for use in recording growth of plants.
10.	Dynamo :	Instrument for transforming mechanical energy into electrical energy.
11.	Fathometer :	Instrument used for measuring depth of the ocean.
12.	Geiger Counter :	Instrument for recording the amount of radiation emitted by a source of radio-activity.
13.	Hydrometer :	Instrument used for measuring the specific gravity of liquids
14.	Hydrophone :	Instrument used for recording sound under water
15.	Hygrometer :	Instrument for measuring the amount of water vapours (humidity) in the atmosphere.
16.	Kymograph :	Instrument used to record graphically various physiological movements i.e.,blood pressure,heart beating, study of lungs etc. in living beings.
17.	Lactometer :	Aparatus used for measuring the purity of milk.
18.	Manometer :	Apparatus used for determining the pressure of a gas.
19.	Odometer :	Instrument by which the distance covered by wheeled vehicles is recorded.
20.	Oscillograph :	Instrument for recording electrical or mechanical vibrations.
21.	Photometer :	Apparatus used to compare the illuminating power of two sources of light.
22.	Pyrometer :	Instrument for recording high temperatures froma great distance.
23.	Radiometer :	Instrument for measuring the emission of radiant energy.
24.	Rain gauge :	Apparatus for recording of rainfall at a particular piece.
25.	Refractometer :	Instrument to measure refractive indices.
26.	Saccharimeter :	Instrument for determining the amount of sugar in a solution.
27.	Sextant :	An optical instrument used for finding out the altitude of celestial bodies and their angular distances.
28.	Sphygmomanometer:	Instrument used for measuring arterial bolld- pressure.
29.	Spherometer :	Instrument for measuring curvature of surfaces.
30.	Seismograph :	Instrument used for recording earthquake shocks.
31.	Tachometer :	Instrument for determining speeds of aeroplanes and motor boats.
32.	Thermostat :	Instrument used to regulate the temperature to a particular degree.
33.	Transformer :	An electrical apparatus used to convert high voltage to low and vice versa