Actinometer | Measures the intensity of light |

Altimeter | Special type of aneroid barometer, used in measuring altitudes |

Ammeter | Measure the strength of an electric current |

Anemometer | Measure the velocity and find the direction of the wind |

Aspirator | An apparatus used for removing liquids from body cavity |

Audiometer | Measure difference in hearing |

Barograph | An aneroid barometer used to monitor pressure |

Barometer | Measures atmospheric pressure |

Beaufort scale | Measures wind force |

Binocular | Optical instrument designed for magnified view of distant objects |

Bolometer | Measures heat radiation |

Calorimeter | Measures quantities of heat |

Chronometer | Clock to determine longitude of a vessel of sea |

Colorimeter | Compares intensities of colour |

Crescograph | Records electrically the response of living matter to various kinds of stimuli. |

Dynamo | Converts mechanical energy into electrical energy |

Electroscope | Detects the presence of electric charge |

Fathometer: | Measures depth of the ocean |

Galvanometer | Measures electric current |

Hydrometer | Measures the relative density of liquids |

Hydrophone | Measures sound under water |

Hygrometer | Measures the relative humidity of the atmosphere |

Hygroscope | Shows changes in atmospheric humidity |

Kymograph | It graphically records physiological movements (Blood pressure and heart beat). |

Lactometer | Measures the relative density of milk |

Lactometer | Measures the relative density of milk |

Magnetometer | Measures the strength and direction of magnetic fields |

Manometer | Measures the pressure of gases |

Micrometer | Measures accurately small distances or angles |

Microscope | Used to see small objects magnified. |

Odometer | Measures the distance covered by wheeled vehicles. |

Periscope | Views objects lying above the eye level of the observer and whose direct vision is obstructed. |

Photometer | Compares the luminous intensity of the sources of light. |

Planimeter | Measures area of a plane surface. |

Pyknometer | Measures the density and co-efficient of expansion of liquid. |

Pyrheliometer | Measures solar radiations. |

Pyrometers | Thermometers to measure high temperatures. |

Quadrant | Measures altitudes and angles in navigation and astronomy. |

Refractometer | Measures the refractive index of a substance. |

Salinometer | Type of hydrometer used to determine the concentration of salt solutions by measuring their densities. |

Seismograph | Records the intensity and origin of earthquake shocks. |

Sextant | Measures angular distances between two objects. |

Spherometer | Measures the curvature of spherical objects. |

Sphygmomanometer | Measures blood pressure. |

Stroboscope | Views the objects moving rapidly with a periodic motion and to see them as if they were at rest |

Tangent galvanometer | Measures the strength of direct current. |

Theodolite | Measures horizontal and vertical angles. |

Thermostat | Regulates constant temperatures. |

Viscometer | Measures the viscosity, i.e. the property of resistance of a fluid to relative motion within itself. |

Voltmeter | Measures potential difference between two points. |

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