China offers series of quality professional Compasses used for surveying purpose:

Compass
-Digital Geological Compass
-Geological Compass
-Pocket Compass
-Suspended Mining Compass
-Compass with Clinometer
-Optical Compass/Forest Compass

Digital Compass
DZL-1
DZL-1J
DZL-1G

Pocket Compass
DQL-8
DQL-2A
DQY-1
DQL-16A
DQL-10A
DQY-1A
DQL-3
DQL-11

Clinometer/Altimeter
DQL-16B

Compass with Clinometer
DQL-10A

Suspended Mining Compass
DQL-100G1
DQL-100G2

Height Measurer
CGQ-1
SRC-I/30

Optical Compass/Forest Compass
DQL-12Z
DQL-16Z
DQL-16ZJ (with laser)
DQL-16ZJC (with laser distance meter)


Magnifying Rate                        12x
Differentiating Rate                   11"
Stadia multiplication constant    100
Stadia additive constant             0
Minimum Vision Range              2mm
Dial Scale                                   1°
Size                                            14×10.5×19cm
Weight                                        0.7kg


DQL-12Z theodolite compass is suitable for mining and surveying in forestry and exploitation of Mines. For example, measure orientation, horizontal angle, vertical angle, elevation difference, distances. Besides, it's suitable for agriculture, hydraulic engineering, geology and general engineering.

DQL-12Z consist of telescope, magnetic compass, stabilizing apparatus and tripod. Adjust the level ,the magnetic needle will point to the north, will have the correct magnetic azimuth after regulating the magnetic declination.
The magnetic compass have a free rotation needle, 360 degrees scale circle and rotations body, the body could rotate 360 degree.
There are two columnar bubble level in the compass body and a universal ball to easy keep the compass in level state.
The DQL-12Z have the 12x erect image telescope with objective lens, Lens cone, Steering prism and ocular lens, the telescope has a vertical rotating fulcrum, can be turned up and down for ±50 degree.
The telescope have the prism could display the erect image, it let the target become the actually elevation picture in the reticule
So it is very convenient for the surveyor.


DQL-16Z theodolite compass is suitable for mining and surveying in forestry and exploitation of Mines. For example, measure orientation, horizontal angle, vertical angle, elevation difference, distances. Besides, it's suitable for agriculture, hydraulic engineering, geology and general engineering.
DQL-16Z consist of telescope, magnetic compass, stabilizing apparatus and tripod. Adjust the level ,the magnetic needle will point to the north, will have the correct magnetic azimuth after regulating the magnetic declination.
The magnetic compass have a free rotation needle, 360 degrees scale circle and rotations body, the body could rotate 360 degree.
There are two columnar bubble level in the compass body and a universal ball to easy keep the compass in level state.
The DQL-16Z have the 16x erect image telescope with objective lens, Lens cone, Steering prism and ocular lens, the telescope has a vertical rotating fulcrum, can be turned up and down for ±50 degree.
The telescope have the prism could display the erect image, it let the target become the actually elevation picture in the reticule
So it is very convenient for the surveyor.