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Measuring instruments

Astrolabe
Astronomical instrument
Barometer
Scientific instrument used to measure atmospheric pressure
Breathalyzer
Device to estimate blood alcohol concentration
Calipers
Tool to measure dimensions of an object
Calorimeter
Instrument for measuring heat
Feeler gauge
Tool used to measure gap widths
Geiger counter
Instrument used for measuring ionizing radiation
Instrumentation
Device for measuring a physical quantity
Metre-stick
Straightedge or folding ruler used to physically measure lengths
Odometer
Instrument that indicates distance traveled by a vehicle
Optical spectrometer
Instrument to measure the properties of visible light
Photometer
Scientific instrument
Ruler
An instrument used to measure distances or to draw straight lines
Seismometer
Instrument that records seismic waves by measuring ground motions
Spectrometer
Used to measure spectral components of light
Speedometer
Speed gauge in motor vehicles
Tape measure
Flexible ruler used to measure size or distance
Thermometer
Device to measure temperature
Torque wrench
Tool used to precisely apply a specific torque to a fastener such as a nut or bolt
Vernier scale
Auxiliary scale of a measurement device, used to increase precision