Durham Geo Enterprises Inc. (also known as "Durham Geo", "DGSI" or "Slope Indicator") provides high quality measurement instruments for some of the world's most important construction projects. We design, manufacture, and supply 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, as well as equipment rental, repair and calibration.

Our expertise results from decades of experience. Our geotechnical instruments have been manufactured since 1958; our materials testing equipment have been manufactured since 1965 under the Brainard Kilman name; and our environmental pumps have been manufactured since 1990.

Durham Geo serves consulting engineers and scientists, earth and civil contractors, universities, government entities, research laboratories and civil and environmental construction companies across all states in the USA and more than 50 countries.


Roctest Ltd. and its subsidiaries design, manufacture, and market sensors and high-precision measurement instruments for the civil and geotechnical engineering market, and energy, healthcare and process control industries. Roctest is recognized throughout the industry as providing leading-edge technology. In addition, Roctest is committed to quality and utilizing technical expertise and advanced product development within the challenging and demanding measurement environment.

Because of that commitment, Roctest offers unparalleled range of market solutions, utilizing traditional vibrating wire and state-of-the-art fiber optic technologies. For just a fraction of the cost of obtaining new or maintaining existing traditional infrastructure such as bridges, tunnels, dams, waterways, high-rise buildings, industrial transformers, pipelines or even oil tankers, our sensors and measuring instruments reduce the risk of damage to your infrastructure and the environment, excessive wear and tear in machinery, and even loss of life to your team members and the public.


Sensornet Ltd. came to market in 1998 and provides the world's most advanced asset monitoring solutions using real-time distributed temperature, strain, and pressure-measuring fiber optic systems. Sensornet serves three primary business sectors - Downstream Process, Power, and Environmental business. We are ISO 9001 accredited and meet all current Health and Safety regulations.

Sensornet's award-winning technology is supported by highly qualified and experienced technical, operations and management teams, and provides turnkey solutions to many of the world's leading blue-chip companies. Sensornet offers complete project solutions from system engineering and design to data interpretation services and post-delivery support.


Sherborne Sensors Ltd. can be traced back to 1945, with the formation of Schaevitz Engineering; a US-based manufacturer of LVDTs and other precision sensors. After nearly three decades of success, Schaevitz Engineering began manufacturing inertial products in the UK in 1974. In 2007, Sherborne Sensors extended its product range beyond inertial sensors by obtaining the former Maywood Instruments force transducer product lines and intellectual property. Sherborne Sensors has since extended its operation further, establishing a sales and stocking location in North America in 2009. As we approach the 40th year of production of Schaevitz® inertial sensor products in the UK, and the 34th year of production of Maywood force products, Sherborne Sensors continues the legacy of cost-effectively manufacturing its products to the highest quality and performance standards in the industry.


Soil Instruments Limited has been at the forefront of design, development, installation, and distribution of leading-edge geotechnical and structural monitoring instrumentation, software, and supplies worldwide.

For over five decades, numerous small to large-scale construction projects such as civil engineering, mining, deep excavations, dams, tunnels, railway and road infrastructures have depended on Soil Instruments for comprehensive field monitoring and installation solutions.


For over 35 years, Westbay Instruments has been a world leader in providing reliable, cost-effective multilevel groundwater instrumentation systems for three-dimensional groundwater monitoring and characterization. The versatility and reliability of data obtained with a Westbay system helps minimize data gaps, reduce uncertainty, and, ultimately, improve project outcomes.


For over 25 years, Waterloo Hydrogeologic has been developing innovative software for use in groundwater modeling, environmental data management, water quality analysis and visualization, pumping test data analysis, groundwater remediation, and unsaturated flow simulation. Waterloo Hydrogeologic’s software sets the standard for user-friendly solutions with environmental data management, analysis, plotting, modeling, and visualization.


Van Essen Instruments B.V. was founded in 1988 and is a world leader in the design, manufacture, and sale of premium groundwater dataloggers and groundwater monitoring network management technology.

Van Essen’s groundwater dataloggers provide long-term measurements of water levels, temperature, and conductivity — essential data for effective water resource management, environmental remediation, mine dewatering, and slope stability. Its groundwater monitoring network technology integrates superior field instrumentation with the industry's latest wireless communication and data management capabilities to streamline project workflows and enable users to effectively manage groundwater resources over the long-term.


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