It does not require an instrument to measure visibility. Visibility is assessed by eye. The distance that you can see, is the visibility.
for measuring visibility on runways v use tranmissometer
This instrument doesn't exist; visibility is measured with the eyes, having some landmarks for comparison.
Visibility is measured with two instruments, the first instrument is a transmissometer. A transmissometer has a laser transmitter and a receiver. The second instrument that is used is called a forward scatter visibility sensor.
A thermometer or thermister
An ECG (Electrocardiography) machine.
An audiometer is the instrument that measures hearing.
This instrument is generally known as a Speedometer.
That would be a thermometer.
humidity is moisture in the air and is measured with a hygrometer
An anemometer measures wind speed A wind vane shows the wind direction
Seismograph is the instrument that measures ground vibrations.
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 tape measure is an instrument that measures perimeter. This can be used in the construction industry to measure a room.
This instrument is called calorimeter.
It measures the distance that human eyes can observe his(or her) surroundings. For example, in weather news, the visibility of the day with fogs is about 2kms from the shore.
A tonometer measures eye pressure.
A thermometer measures molecular energy.