What is a gravity meter????

Question

How does it work?

Thanks

Answer 1

wiki, help!

http://en.wikipedia.org/wiki/Acceleromet...

Answer 2

It is exactly that a meter for measuring the pull of gravity and it is used in such things as looking for oil. Gravity affects seismic readings and the meter helps correct miss-readings.

They also use resistivity (the resistance on an electrical charge pumped into the earth) to determine things like permafrost that also affects seismic readings.

Answer 3

A device that measures local acceleration due to the Earth's gravity; it is also called a gravimeter. Such instruments fall into two categories: relative gravity meters, which are used to determine gravity differences among a number of geographic locations or changes in gravity that occur at a single location over time; and absolute gravity meters, which can measure the true value of the acceleration due to gravity at a given location and time.

One of two methods is used in all gravity meters. The first, employed by absolute gravity meters, is the direct determination of the acceleration of a test mass falling inside a vacuum chamber by using optical interferometry. The second is the observation of variations in the position of a mass supported by a mechanical or magnetic spring. This method, applied in relative gravity meters and shipboard gravity meters, is usually used in conjunction with an additional applied force (nulling force) that maintains the mass at a null position. The small nulling force is a relative measure of gravity.

Have a look on this

http://en.wikipedia.org/wiki/Gravimeter