aerometer: an instrument designed to measure the density (among other parameters) of the air and some gases.
armillary sphere (variations are known as spherical astrolabe, armilla, or armil) is a model of objects in the sky (on the celestial sphere), consisting of a spherical framework of rings, centred on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features, such as the ecliptic.
Aneroid barometer: an instrument for measuring pressure as a method that does not involve liquid. Invented in 1844 by French scientist Lucien Vidi,the aneroid barometer uses a small, flexible metal box called an aneroid cell (capsule), which is made from an alloy of beryllium and copper. The evacuated capsule (or usually more capsules) is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer. Many models include a manually set needle which is used to mark the current measurement so a change can be seen. In addition, the mechanism is made deliberately “stiff” so that tapping the barometer reveals whether the pressure is rising or falling as the pointer moves. This type of barometer is common in homes and in recreational boats but also used in meteorology, mostly as barograph and pressure instruments in radiosondes.
English: Baroscope, Barometer
- Balance bar/pole
- Balance wheel
Geiger–Müller tube or G–M tube is the sensing element of the Geiger counter instrument used for the detection of ionizing radiation.
Goniometer – A goniometer is an instrument that either measures an angle or allows an object to be rotated to a precise angular position.
A. Magnet. B. Lightning rod.
kaleidoscope: an optical instrument with two or more reflecting surfaces tilted to each other in an angle, so that one or more (parts of) objects on one end of the mirrors are seen as a regular symmetrical pattern when viewed from the other end, due to repeated reflection.
Calorimeter is an object used for calorimetry, or the process of measuring the heat of chemical reactions or physical changes as well as heat capacity.
kymograph: a device that draws a graphical representation of spatial position over time in which a spatial axis represents time. It basically consists of a revolving drum wrapped with a sheet of paper on which a stylus moves back and forth recording perceived changes of phenomena such as motion or pressure.
dropper, glass dropper, dropping tube.
Chromograph: a compact device for making quick semiquantitative tests for one or more chemical elements.
Chromoscope: an optical instrument for combining colored images so as to produce a picture in natural colors.