a survey to measure the height of tides
a measuring instrument used to measure the speed of sound
a sonar device used to measure the depth of water
a person who determines the direction of a wind
an apparatus for measuring the degree of negative pressure, called vacuum gauge
an apparatus used to measure microscopic lengths, called comparator
a device to measure the amount of dust in the air, called a {conimeter}
an instrument used to measure mechanical power, called a fan dynamometer
an instrument used for measuring, called stadimeter
an instrument used as a gauge
a measuring instrument for measuring the vital capacity of the lungs
an instrument used to measure force or power