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Gravimetry: Overview

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Gravimetric analysis is a quantitative method where the analyte is isolated and weighed directly or after conversion into a substance of known composition. Gravimetric analysis can be classified as precipitation, electrogravimetry, volatilization, and particulate gravimetry, based on the method used to isolate the analyte.
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Updated: Jun 16, 2026

Automatic Laser-based Geometry Capture for Finite Element Analysis of Weld Beads

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Published on: July 25, 2025

High-precision laser gravimeter.

G P Arnautov, L D Gik, E N Kalish

|February 4, 2010

Summary

A new ballistic gravimeter uses laser interferometry and a rubidium frequency standard for precise measurements. This instrument achieves high accuracy in determining gravitational acceleration, crucial for geophysical studies.

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Area of Science:

Geophysics
Metrology
Instrumentation

Background:

Precise measurement of gravitational acceleration is essential for various scientific disciplines, including geodesy and fundamental physics.
Traditional gravimetry methods face limitations in accuracy and precision.

Purpose of the Study:

To develop and validate a novel ballistic gravimeter for high-precision gravity measurements.
To assess the performance and accuracy of the constructed instrument.

Main Methods:

Utilized a laser interferometer to accurately measure the vertical displacement of a free-falling body.
Employed a rubidium frequency standard for highly precise time-of-flight measurements.
Implemented correction methods to minimize systematic errors in gravitational acceleration determination.

Main Results:

Achieved a distance measurement error below 2 x 10(-8).
Attained a time measurement error below 2 x 10(-11).
Demonstrated a systematic error in gravitational acceleration measurement not exceeding 0.02 mgal after corrections.

Conclusions:

The developed ballistic gravimeter offers a significant advancement in precision gravity measurement.
The instrument's high accuracy makes it suitable for demanding geophysical and metrological applications.
Further refinements could enhance its capabilities for even more sensitive gravity studies.