JTL-40FWL non-cable horizontal fiber optic gyro inclinometer is a new type of inclinometer adopting high-precision fiber optic gyroscope as the measurement component, which is a new high-precision drilling inclinometer specifically designed for measuring horizontal borehole inclination and orientation at magnetic mines and in iron bushings. The instrument is widely used in metallurgy, engineering, hydrology, oil, coal field, geology and other borehole logging areas.