SL-OA69 Grease Intelligent Cone Penetration Tester This intelligent penetration tester is an innovative patented product designed in compliance with GB/T269-91 and ISO2137 standards. Penetration testing measures the viscosity and hardness of grease by determining the depth a cone falls into the sample under specified load, time, and temperature conditions. Key Features High Precision: Utilizes high-precision LVDT displacement sensor with 0.01mm resolution (0.1 cone penetratio