This instrument utilizes a magnetic object—a magnetic needle (which features a special design to shorten the needle’s stabilization time and enhance measurement efficiency)—that is capable of indicating a specific direction along the magnetic meridian. By reading the scale ring, one can determine the azimuth of a target relative to the magnetic meridian. Based on two selected survey points (or known reference points), the position of an unknown target can be determined. The instrument can measure structural orientations, including strike, dip direction, and dip angle; conduct topographic surveys, including azimuth determination (i.e., intersection-based point positioning), slope angle and gradient measurement, and horizontal plane identification; and measure vertical angles. A magnetic declination adjustment axis is provided on the exterior of the instrument housing. This instrument is characterized by its compact structure, small size, portability, reliable accuracy, and stable performance.

This instrument utilizes a magnetic object—the magnetic needle (which features a special design to shorten the needle’s stabilization time and enhance measurement efficiency)—to indicate a specific direction along the magnetic meridian. By reading the scale ring, one can determine the azimuth of a target relative to the magnetic meridian. Based on two selected survey points (or known reference points), the position of an unknown target can be calculated. The instrument is capable of measuring structural orientations, including strike, dip, and dip angle; conducting topographic surveys, such as determining orientation via intersection positioning, measuring slope angles and gradients, establishing horizontal planes, and measuring vertical angles. A magnetic declination adjustment screw is provided on the exterior of the instrument housing. This instrument boasts a compact structure, small size, and light weight. Its housing is manufactured by die-casting and finished with a sand-textured paint coating that offers excellent adhesion, a high-end appearance, corrosion resistance, impact resistance, portability, reliable accuracy, and stable performance. Moreover, the instrument’s magnetic needle and spirit level are durable and of superior quality.

This instrument determines the azimuth of a target by reading the magnetic needle against a graduated dial. In addition, it is equipped with a plumb-bob-type clinometer; when used in conjunction with the slope-angle scale on the sighting telescope, it can measure various slope angles of the target. The pocket theodolite is primarily used for measuring geological attitudes—namely strike, dip direction, and dip angle—as well as for preliminary topographic surveys, including determining position (i.e., intersection points), measuring slope angles, and establishing horizontal planes; it can also be used to measure verticality and to produce topographic maps. The front face of the instrument body is fitted with a gear shaft for adjusting the magnetic declination. A 60-mm scale is engraved on the side of the instrument body for drafting purposes. This instrument features a compact structure, small size, light weight, portability, simple operation, reliable accuracy, and stable performance.

< 12 >