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The compass is the latest model from world renowned manufacturers Harbin Optical instrument Factory made in China with precision engineering, it is a stratum compass with hinge inclinometer made for rugged use in the field while delivering fast and accurate results. . It uses an azimuth dial which has direction readings from 0° to 360, a measuring scale along the instruments side, a vertical bubble level to assist in obtaining accurate results and a hinge inclinometer (inclinometer readings printed on the hinge joint), this along with the azimuth dial allows users to quickly obtain dip and strike reading for geological purposes in one go, this method is known as the 'Dr. Clar method'. The compass needle also has a locking device which allows you to lock the needle in place so that you can move the compass away from an awkward position and still obtain the correct directional reading. An easy declination adjustment screw enables you to alter the declination without having to open up the instrument (as per the previous model) A lanyard is also provided as standard to enable users to keep the compass close by or prevent it from dropping. All of this is housed within a tough, waterproof, rugged aluminised housing which is anti magnetic and magnetitc resistant, with scratch resistant glass and no liquid. An excellent high precision instrument to provide only the best results in the field, suitable for use in many sectors including topographical mapping, geological data collection, surveying, architecture and much more.
- Azimuth dial: diameter 60 mm
- Reading by estimation 0.5°
- Declination adjustment up to 360°
- Declination adjustment without opening the instrument housing
- Dip measuring range 270° graduated in 5°
- Needle locking mechanism
- Circular spirit level
- Ruler 50 mm
- Dimensions of closed compass ： 77.5 x 66 x 20 mm
- Total weight 0.2kg
What happens to my compass in the southern hemisphere? For a compass to work properly, the compass needle must be free to rotate and align with the magnetic field. The difference between compasses designed to work in the northern and southern hemispheres is simply the location of the "balance", a weight placed on the needle to ensure it remains in a horizontal plane and hence free to rotate. In the northern hemisphere, the magnetic field dips down into the Earth so the compass needle has a weight on the south end of the needle to keep the needle in the horizontal plane. In the southern hemisphere, the weight needs to be on the north end of the needle. If you did not change the weight, the needle would not rotate freely, and hence would not work properly.