YST-48R mud-pulse MWD was designed to meet various needs of hole diameters, flow rates and other drilling requirements. The positive pulse system with minimum moving parts extends downhole life, simplifies maintenance and offers low resistance to flow ranges from 10 to 55l/s. The downhole assembly is modular, which ensures easy handling and maintenance. The probe power requirement is low, providing better operating economy and longer battery life. Its outer diameter is 48mm and suitable for all hole diameters.