GEOKON is a 100% employee-owned manufacturer of geotechnical and structural instrumentation based in Lebanon, New Hampshire, USA, founded in 1979 by Barrie Sellers. It makes a broad range of sensors, including vibrating wire piezometers, inclinometers, strain gauges, displacement transducers, extensometers, settlement sensors, pressure cells, load cells, tiltmeters, stressmeters, TDR, distributed fiber optic sensors and vibration monitoring. It also makes data loggers, readouts, visualization software and the GeoNet wireless data acquisition system. The company offers custom instrumentation design, calibration, field services, rentals and training, and operates worldwide through regional offices and a network of partners.