| Instrument | Use |
| Altimeter | Measures altitudes (used in aircraft) |
| Ammeter | Measures strength of electric current |
| Anemometer | Measures force and velocity of wind and directions |
| Audiometer | Measures intensity of sound |
| Barograph | Continuous recording of atmospheric pressure |
| Barometer | Measures atmospheric pressure |
| Binoculars | To view distant objects |
| Bolometer | To measure heat radiation |
| Callipers | Measure inner and outer diameters of bodies |
| Calorimeter | Measures quantities of heat |
| Cardiogram | Measures quantities of heat |
| Cardiogram (ECG) | Traces movements of the heart; recorded on a Cardiograph |
| Cathetometer | Determines heights, measurement of levels, etc, in scientific experiments |
| Chronometer | Determines longitude of a vessel at sea. |
| Colorimeter | Compares intensity of colours |
| Commutator | To change/reverse the direction of electric current; Also used to convert AC into DC |
| Cryometer | A type of thermometer used to measure very low temperatures, usually close to 0°C |
| Cyclotron | A charged particle accelerator which can accelerate charged particles to high energies |
| Pilatometer | Measures changes in volume of substances |
| Dyanamo | Converts mechanical energy into electrical energy |
| Dynamometer | Measures electrical power |
| Electro encephalo grameg (EEC) | Measures and records electrical activity of brain |
| Electrometer | Measures very small but potential difference in electric currents |
| Electroscope | Detects presence of an electric charge |
| Electro microscope | To obtain a magnifying view of very small objects Capable of magnifying up to 20,000 times |
| Endoscope | To examine internal parts of the body |