The compact, economical TESC (thermoelectric sample conditioner) system integrates and automates the entire ASTM D2983 conditioning and testing process for low-temperature viscosity of gear oils and ATF. Provides an automated alternative to ASTM D2983 sample conditioning and testing. Eliminates sample disruption during preheating, room temperature stabilization, cooling and final viscosity testing. Reduces result variability due to temperature fluctuation. Provides superior precision. Allows for unattended operation.