Sentek Instrument is a company that develops and manufactures optical sensors designed for single-point or distributed sensing in harsh environments. It offers products for use in ultrahigh temperatures, high pressures and voltages, flammable or explosive surroundings, severe electromagnetic interference, high-energy radiation, and challenging chemical conditions. The company provides sensors for gas turbine monitoring, permanent installation in oil, natural gas, and geothermal wells, micro-seismic event detection, vertical seismic profiling, etc.