Geologic compass, Freiberg version, type 69 with mirror
Even in the age of satellite-based systems, orientation in the terrain is often done the traditional way with topographic map and compass and altimeter. The Freiberg geological compasses are primarily used to determine the spatial position of rock structures, but also for geological mapping.
This geological compass ensures convenient handling as a single-circle and also dual-circle compass due to its handy format and drop measuring plate. It is as suitable for general geological field work as for special geologic structurbased, reservoir tectonic or geo-engineering rock mechanical work.
It has a pendulum clinometer, and the declination can be adjusted by means of a gear drive. Its needle is equipped with a sliding copper weight to eliminate inclination. The graduated circle is adjustable so that the declination value can be set. A clinometer for inclination measurements of high accuracy is located in the compass housing. A circular bubble as well as a laterally mounted tubular bubble allow the instrument to be levelled even at measuring points which are difficult to reach. In addition to measuring drop angles, the drop measuring plate also serves to protect the cover glass.
- with mirror
- sapphire bearing
- upright magnetic needle
- possibility of locking the magnetic system
- easy adjustment of graduated circles
- inclination measurements of higher accuracy due to lockable clinometer
- circular bubble for leveling
- lateral tubular bubble for measurements at difficult to reach places
- declination and inclination can be easily adjusted to locally applicable values
- drop measurement plate to protect cover glass and measure drop angles
- protective leather pouch
- Compass graduated circle: left hand dialed every 10° (10 gon); diameter 45 mm; scale value 2° (2 gon)
- Clinometer: Measuring range 90° (+100 gon); scale value 2° (2 gon); estimate 0.5° (0.5 gon)
- Contact edge: graduation length: 70 mm; scale value: 1 mm; settling time of magnetic needle < 50s ; accuracy of direction indication: + 0.5° (+ 0.5 gon); declination setting: arbitrary; tilt range of drop measuring plate: 225° (250 gon); indication of circular bubble: approx. 40'; indication of tubular bubble: approx. 60'
Dimensions:
Compass: 93 x 76 x 22 mm
Pouch: 104 x 91 x 45 mm
Weight: 280g
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