There are instruments called Ceilometers which can measure cloud height and cover, but they're not especially accurate for cover (they are quite good for cloud height, especially at night) as a cloud can sit over the instrument and give a false reading. Also, unless cloud passes over them they give a false negative. The best instrument for measuring cloud cover is a trained Mark I eyeball (or two).
This instrument doesn't exist; visibility is measured with the eyes, having some landmarks for comparison.
A Nephoscope measures cloud altitude and direction.
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RADIOSONDE
Trained mark
Trained mark
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A compass.
A seismograph
lectometer
Anemometer
a scale
This instrument is a balance.
A tiltmeter measures changes in the tilt of the earth. :)A tiltmeter is an instrument that measures changes in the tilt of the earth. :)
A calorimeter measures heat. In contrast, a thermometer measures temperature.A thermometer bolometer - an instrument that measures heat radiation; extremely sensitive calorimeter - a measuring instrument that determines quantities of heatHeat is measured with a ThermometerThermometerThermometer or calorimeterThermometerthermometerHeat is measured with a thermometer.
The ceilometer instrument.
A thermometer measures molecular energy.
a calender
ruler
An aeroplane
a creep meter
A sextant
A ruler
grams