Namibia DQL-8 Geological Compass

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.

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NamibiaGeological compass

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Product Description

1. Graduated dial: 0°–360°, graduation interval: 1°. Steering wheel: the outer ring is刻ed with slope indications (the tangent of a 45° slope in both directions), with a graduation interval of 0.05; the inner ring is刻ed with slope indications for 90° slopes in both directions, in degrees, with a graduation interval of 1°.

2. The damping time of the magnetic needle (the time it takes for the needle to deflect by 90° and then come to rest in its original position) is less than 15 seconds.

3. Reading error:

a. The angular error between the readings before and after the magnetic needle rotates shall not exceed 0.5°;

b. At 0°–180° and 90°–270°, the error caused by eccentricity in the magnetic needle shall not exceed 0.5°;

c. The reading error of the protractor shall not exceed 0.5°.

4. Spirit level sensitivity:

a. Long level vial: 15′ ± 3′ per 2 mm

b. Circular level: 30′±5′/2mm

5. Instrument external dimensions (length × width × height): 80 × 70 × 35 mm

6. Instrument weight: 0.24 kg

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