accelerometer - an instrument for measuring the acceleration of aircraft or rockets

actinometer - an instrument for measuring the intensity of electromagnetic radiation (usually by the photochemical effect)

algometer - device for measuring pain caused by pressure

altazimuth - an instrument that measures the altitude and azimuth of celestial bodies; used in navigation

altimeter - an instrument that measures the height above ground; used in navigation

atmometer, evaporometer - an instrument that measures rate of evaporation of water

audiometer, sonometer - an instrument used to measure the sensitivity of hearing

barometer - an instrument that measures atmospheric pressure

bolometer - an instrument that measures heat radiation; extremely sensitive

bubble chamber - an instrument that records the tracks of ionizing particles

buret, burette - measuring instrument consisting of a graduated glass tube with a tap at the bottom; used for titration

caliper, calipers, calliper, callipers - an instrument for measuring the distance between two points

calorimeter - a measuring instrument that determines quantities of heat

chronoscope - an instrument for accurate measurements of small intervals of time

colorimeter, tintometer - a measuring instrument used in colorimetric analysis to determine the quantity of a substance from the color it yields with specific reagents

counter tube - a measuring instrument for counting individual ionizing events

craniometer - an instrument for measuring skull sizes

cryoscope - a measuring instrument for measuring freezing and melting points

declinometer, transit declinometer - an instrument for measuring magnetic declination

densimeter, densitometer - a measuring instrument for determining density or specific gravity

densitometer - a measuring instrument for determining optical or photographic density

dosemeter, dosimeter - a measuring instrument for measuring doses of ionizing radiation (X-rays or radioactivity)

dynamometer, ergometer - measuring instrument designed to measure power

electrodynamometer - measuring instrument that uses the interaction of the magnetic fields of two coils to measure current or voltage or power

electroscope - measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign

eudiometer - measuring instrument consisting of a graduated glass tube for measuring volume changes in chemical reactions between gases

gauge, gage - a measuring instrument for measuring and indicating a quantity such as the thickness of wire or the amount of rain etc.

graduate - a measuring instrument for measuring fluid volume; a glass container (cup or cylinder or flask) whose sides are marked with or divided into amounts

gravity meter, gravimeter - a measuring instrument for measuring variations in the gravitational field of the earth

haematocrit, hematocrit - a measuring instrument to determine (usually by centrifugation) the relative amounts of corpuscles and plasma in the blood

gravimeter, hydrometer - a measuring instrument for determining the specific gravity of a liquid or solid

hygrometer - measuring instrument for measuring the relative humidity of the atmosphere

dip circle, inclinometer - a measuring instrument for measuring the angle of magnetic dip (as from an airplane)

instrument - a device that requires skill for proper use

integrator, planimeter - a measuring instrument for measuring the area of an irregular plane figure

interferometer - any measuring instrument that uses interference patterns to make accurate measurements of waves

ionization chamber, ionization tube - a measuring instrument that measures the amount of ionizing radiation

katharometer - measures thermal conductivity

Kundt's tube - a measuring instrument used to measure the speed of sound

lidar - a measuring system that detects and locates objects on the same principle as radar but uses light from a laser; a potential technology for detecting air turbulence that can affect aircraft