Fathometer is used to measure -

উত্তরঃ Fathometer is used to measure Ocean depth. Fathometer is A depth finder that uses sound waves to determine the depth of water. The Richter Scale is used to measure the intensity of Earthquakes. Hygrometer: Humidity is the measure of the amount of moisture in the air. A psychrometer is an example of a hygrometer. A psychrometer uses two thermometers to measure relative humidity; one measures the dry - bulb temperature and the other measures the wet - bulb temperature.