... . MWD obtains real-time measurements downhole, such as gamma rays, temperature, soil resistivity, pressure, drill angle, etc ... transmits data, composes of Directional Probe, Pulser, Gamma Detector Probe and Battery Housing. Surface equipment composes ... Max Pressure: 100MPaPressure barrel outer diameter: Φ48mm Natural Gamma: Sensor: Scintillating crystal + Photomultiplier tube Recommended minimum sample ...