Applications and Feature Used for magnetic exploration in wells. Suitable for use in drilling with diameter greater than φ46mm for measurement of horizontal component X, Y and vertical component Z in magnetic field. Can also be used as high-precision inclinometer with non-magnetic hole or far away from magnetic well. It can solve the following issues. Verify ground magnetic abnormality, and determine the nature of abnormality. Combined with ground magnetic survey for three-dimensional interpretation. High-precision measurement of deviation azimuth and inclination. Instruct the drilling arrangement, and guide the drilling. Determine the depth and direction of blind ore. Determination of ore body position, extension, range and thickness of exposed ores. Determination of the occurrence of ore bodies. Searching of magnetic ore associated ore deposits. Technical Specifications Measuring Range: -99999nT~+99999nT Difference of readings at the opposite orientation for X, Y magneto sensors ≤400nT Difference of readings at the opposite orientation for Z magneto sensor ≤ 300nT Inclination Measuring Range: 0~45°, Error: smaller than 0.2° Azimuth Measuring Range: 0~360°, Error: smaller than 2° (inclination ≥3°) Linearity ≤2‰ Digital Output, Update Rate ≥ 3 times / sec Probe Outline Dimension: φ40×1400mm Measured Well Depth ≤ 2000m Probe Pressure-Proof ≤ 150kg/cm2 Dedicated Cable: 4-core Armed Cable Instrument Working Power Supply: DC12V/200mA Working Environment: Temperature: 0~70°; Humidity: 90% (40℃) Master Instrument Outline Dimension: 305×200×228 mm Weight: 4kg: