Durham Geo Slope Indicator designs, manufactures, and supplies a wide range of instruments and equipment needed by geotechnical and environmental professionals. In addition, we offer services related to our products, including training and technical support, equipment rentals, repair and calibration, and field services. Our expertise is the result of many years of experience. Our geotechnical instruments have been manufactured under the Slope Indicator name since 1958; our materials testing equipment, originally under the Brainard Kilman name, since 1965; and our environmental pumps, since 1990. Headquartered in Stone Mountain, Georgia, DGSI has offices in the USA, Canada and Australia and has distributors in 35 countries. Durham Geo Slope Indicator has continuously held an ISO 9001 certification since 2004.