SH0209 Hydraulic Oil Thermal Stability Tester SH/T0209 Standard Hydraulic Fluid Test Oven Performance Features The SH0209 hydraulic oil thermal stability tester is built in strict compliance with SH/T0209 *Test Method for Thermal Stability of Hydraulic Fluids*, and is designed for testing mineral oil-based and formulated hydraulic fluids. This unit comes with an imported digital PID programmable temperature controller. It uses a dedicated high-speed 16-bit A/D converter,