Features and advantages :
1.The product seriation (Φ38mm/Φ46mm/Φ48mm) meets the casing of different diameter for well trace measurement and windowing orientation. 
2.The equipment wiht diameter of 48mm could stand high temperature of 175℃ 
3.Automatically north seeking; no need to find north in well site and drift correction. 
4.In-time data is the real data, no special treatment after measurement. 
5.The operation is not effected by climate, geography, day and night. 
6.Workable even out of power during the working process 
7.Easy operation: man-computer communication by USB, Windows XP/Vista operating environment