Virtual Museum | Geoscience Center | SEG | Student Connection | Ask a Geophysicist! | Donate  instruments | What's new? | Site Map

Search for

[Advanced Search]

Biographies of geophysicists that have lead the way in exploration geophysics
Listing of awards from SEG and their recipients
A gallery of past presidents of SEG
Items on display in the Virtual Museum
Electrical prospecting instruments and technology
Gravity prospecting instruments and technology
Magnetic prospecting instruments and technology
Seismic prospecting instruments and technology
General interest items displaying geophysical methods and technology
Exhibits of geophysical methods
About Us
Contact us

Did you know?

In the 50th anniversary year of the Society, 1980, when the total membership was 14 172, there were 12 319 registered at the Annual Meeting. Eleven of the original thirty founders of SEG attended and were honored at that meeting. That attendance record ha

Instruments \ Gravity \ Gravity Meters \ 

Item Number:



Lamont-Doherty Geological Observatory







Texas Instruments, Inc.


(description by Bob Neese, current owner of the Worden Gravity Meter Company)

The Worden Gravity Meter measures gravity differences of the earth and can detect 1 part in 100,000,000 of the normal gravity of the earth. Under ideal conditions, this meter can measure gravity differences of 0.01 milligal or 1 inch in elevation change. This particular type of Worden meter continues to be in use today for exploration. It is a very portable and accurate gravity meter. It is one of over 1500 Worden Gravity Meters that have been manufactured. This is not quite as old as Gravity Meter SN 131 (Item N0. 88.11.01) and was manufactured after Texas Instruments acquired the business from Sam Worden (Houston Technical Laboratories) in 1953.

Worden Gravity Meters - A General Overview

The Worden Gravity Meter is based on an elastic system constructed of quartz. It is a three spring device employing a pretension of zero-length mainspring to produce the necessary sensitivity. The basic mass is only five milligrams, and the moment of inertia is very low. The low mass, together with the almost perfect elastic qualities of quartz, makes the Worden Gravity Meter a rugged instrument.

Sam Worden developed the Worden Gravity Meter in the late 1940's. In 1953, Worden Gravity Meter manufacturing (Houston Technical Laboratories) was sold, by Worden, to Texas Instruments, and was Texas Instruments' first entry into the geophysical equipment market. This made the Worden Gravity Meter a very special item in the eyes of Texas Instrument's executives, for many years.

In the mid 1980's, Texas Instruments sold its geophysical equipment production facilities to Halliburton Geophysical Services. Halliburton previewed all the products it acquired and decided to seek buyers for the rights to manufacture and sell the instruments that were not considered mass production or assembly-line products. The Worden Gravity Meter Division was transfered in 1990 to Bob Neese who established the Worden Gravity Meter Company in Richmond Texas in conjunction with other gravity operations that had been founded by his father, Urban Neese. The manufacture and service of the Worden Gravity Meter continues today as it has for over 50 years. More than 1500 Worden Meters have been manufactured -- more than any other type of gravity meter.


The SEG Virtual Museum is hosted by
Missouri Southern State University - Joplin, Missouri
--A comprehensive state university for the 21st Century,
emphasizing an international perspective to education
Last Updated: 2/9/2006
 SEG Foundation
This web page and accompanying pages are not maintained by the SEG Business Office staff nor by Missouri Southern State University. SEG nor MSSU do not necessarily endorse or concur with representations made on these pages and have no responsibility for the content. Comments and concerns should be referred to the webmaster, John Knapp, member of SEG Geoscience Center Committee.