PID Controllers: The most common type. They automatically calculate and apply the exact amount of power needed to reach and maintain your target temperature, preventing overshooting.
3. Sensor Input Types
Thermocouple: (Types K, J, S, R) Ideal for high-heat industrial furnaces and ovens.
RTD (Pt100): Ideal for highly accurate, low-to-medium temperature applications like HVAC and water baths. [1, 2, 3, 4, 5]
4. Output Types
The output tells the controller how to regulate the heating/cooling element.
Relay Output: Uses a mechanical switch. Good for devices that do not turn on and off frequently.
SSR (Solid State Relay) Output: Uses an electronic switch. It has no moving parts, making it last much longer and ideal for rapid cycling.
REX Series: The most widely used general-purpose controllers globally (e.g., C100, C400, C900