... angle ra 3D North Finder (3D Attitude Measuring Instrument) Features1.) In-built solid sensor component,with features ... up to0.01°)b) Optimum design of Downhole instrument structure,Cancelled the oscillating device, which cause an ... C Humidity≤85%%Downhole instrument working conditions0~85°CPressure≤25MPaGround instrument size280×310×115mmWeight2.5KgDownhole instrument sizeΦ50×1350mm%weight15Kg ...