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About Us

  • Photo of GEOKON employees celebrating our 40th Anniversay.

    About GEOKON

    GEOKON, a 100% employee-owned company located in Lebanon, New Hampshire, USA, operates on a worldwide basis through a network of agencies. GEOKON was founded in 1979 by Barrie Sellers and currently has more than 160 employees.

    GEOKON is a recognized world leader in the manufacture of geotechnical and structural instrumentation due to our quality, responsive customer service and industry-leading designs. Our broad range of geotechnical instrumentation is manufactured at our factory in the USA, by a staff of trained, qualified and experienced machinists and assemblers.

    In particular, GEOKON, through innovation and experience, has developed a line of vibrating wire sensors unsurpassed anywhere in the world. These highly reliable devices have contributed in no small way to the growing worldwide acceptance of vibrating wire as the most suitable technology for geotechnical applications.

  • Illustration of a typical Vibrating Wire sensor.

    Vibrating Wire Technology 

    The resonant frequency of vibration of a tensioned steel wire is dependent on the strain or tension in the wire. This fundamental dependency is utilized in a variety of configurations for the measurement of strain, load, force, pressure, temperature, and tilt.

    Vibrating wire sensors are well known for their long-term stability. The advantage of vibrating wire sensors over more conventional types lies mainly in the sensor output, which is a frequency rather than a voltage.

    Frequencies can be transmitted over long (>2000 m) cables without appreciable degradation of the signal caused by variations in cable resistance, which can arise from water penetration, temperature fluctuations, contact resistance or leakage to ground. This factor, coupled with the elegance and ruggedness of GEOKON designs results in sensors which exhibit excellent long-term stability and which are ideally suited for long-term measurements in adverse environments.

  • Photo of a copied Strain Gage.

    ‘Caveat Emptor’

    Imitation is the best form of flattery, so we at GEOKON should feel extremely flattered by the number and variety of companies that have chosen to copy the elegant designs of our products. It is quite amazing the extent to which our imitators have gone in order to match the appearance of their products to GEOKON’s.

    So while we marvel at, and applaud the efforts of, our competitors in helping us spread the good word about the use of sensors based on vibrating wire technology, we find it necessary to voice a ‘Caveat Emptor’ that appearances aren’t everything and that beauty may be only skin deep.

    Over 40 years of experience at GEOKON has inevitably honed our products to a high degree of reliability, a reliability which is dependent on subtle improvements and refinements that are not readily visible to the naked eye.

    This is where quality starts and ends.