Partulab HRMS-900 high temperature insulation resistivity measurement system is mainly used for the measurement of the insulation electrical material. The system is designed with the third electrode principle and GB 10581-2006 standard (the measurement method of insulation resistance at high temperature and resistivity measurement method). The system can measure the resistance, bulk resistivity, and leakage of the samples in the condition of high temperature, vacuum, or atmosphere. The system could output the curve with temperature and time. This system has been used for the sensors' research in the field of aerospace, that makes it one of the best systems for the high temperature insulation measurement in the world.