When sourcing temperature controllers from Taiwan, prioritize PID (Proportional-Integral-Derivative) control logic for high precision. Ensure the device supports universal inputs (K, J, T, E, R, S, B thermocouples and Pt100 RTDs). Check the output types required for your application, such as Relay, SSR (Solid State Relay) drive, or 4-20mA analog output. Additionally, verify the sampling rate (ideally <250ms) and the presence of dual LED displays for simultaneous viewing of Set Value (SV) and Process Value (PV).