WIKA Optical Sensing (formerly known as Oxsensis) is a manufacturer of optical pressure sensors for flight systems, power generation, and other harsh environments. Its optical pressure sensor technology is based on the micromachining of super resistant materials, such as single-crystal sapphire, together with fiber optic interrogation techniques. The company offers fuel systems sensors, gas turbine sensors, landing gear sensors, combustor sensors, down hole sensors, and reciprocating engines.