Barometer in which pressure is determined by balancing air pressure against the weight of a column of mercury in an evacuated glass tube.

in folklore, a name for fire.

Wind with a speed between 17 and 21 knots (19 and 24 mph); Beaufort scale number 5.

The sum of solar and terrestrial radiation.

The transducer's output when the maximum sensed value is applied to the transducer's input. For example, the F.S. output of a 4-20 mA transmitter is 20 mA, whereas its span is only 16mA.

The standard deviation of a sufficiently large number of measurements of the same quantity by the same instrument or method. The non-correctable part of the inaccuracy of an instrument, it represents the limit of measurement precision. The uncertainty of ...

A method of winds aloft observation in which the elevation and azimuth angles of a theodolite are read while visually tracking a pilot balloon. Balloon height data is estimated from assumed balloon ascension rates.

Part of a computer word that has meaning in itself, often, a byte.

A set of electrical conductors, often on a backplane, that carry data and power signals among the various components of a computer.

Extended Binary Coded Decimal Interchange Code. A standard code used to represent data using 8 bits per character.

A radiosonde whose carrier wave is modulated by audio-frequency signals whose frequency is controlled by the sensing elements of the instrument.

A mercury barometer arranged so that the position of the upper or lower meniscus may be measured photographically. In one design the image of the meniscus is formed on a rotating drum covered with sensitized paper so that a continuous record of pressure a ...

Any source of radiant energy, especially electromagnetic energy.

The algebraic difference between the upper and lower limits of the measuring range of an instrument, i.e. a thermometer with a range of -35 to 50

Rate of flow of water past a point in a stream, expressed as volume per unit time, i.e. cubic feet per second.

A mercury barometer which measures atmospheric pressure by weighing the mercury in the column or cistern.

The greatest distance at which it is just possible to see and recognize with the unaided eye (1) in the daytime, a prominent dark object against the sky at the horizon, and (2) at night, a known, preferably unfocused, moderately intense light source.

Name sometimes given to a transmissometer.

An instrument used for the determination of the electrical conductivity of the atmosphere.

A modification of the dew cell used in radiosonde equipment.