Length of Magnetic Needle | 100(mm) | |||
Minimum Dial Division Value | 1° | |||
Estimated Value | 30' | |||
N.W. | 48g | |||
Gradiometer | FD200 | |||
Outside Diameter | 200mm | |||
Minimum Division Value | 20' | |||
Application | It's combined with suspended compass and gradiometer.It's mainly used for surveying the minor lanes of mines.Please read carefully "user manual "before using it! |