Product Description
The TC303 is a digital PID temperature controller designed for accurate temperature monitoring and control in industrial heating and cooling applications. It supports multiple thermocouple and RTD sensor inputs and can be configured for PID or ON/OFF control. The controller is widely used in ovens, furnaces, packaging machines, plastic processing equipment, and industrial automation systems.
Key Features
• PID and ON/OFF temperature control modes
• Auto-tuning function for precise temperature regulation
• Supports Thermocouple and RTD sensor inputs
• Single setpoint temperature control
• Relay or SSR control output selectable
• 3-digit LED display for temperature indication
• °C / °F selectable display units
• Fast sampling response for accurate control
• Front panel IP65 protection
• Suitable for industrial heating and cooling applications
Specifications
- Product Type: Digital Temperature Controller
- Model: TC303
- Brand: Selec
- Display: 3-Digit 7-Segment LED Display
- Control Method: PID / ON-OFF Control
- Input Types: Thermocouple (J, K, T, R, S) / RTD (Pt100)
- Temperature Unit: °C / °F Selectable
- Control Output: Relay or SSR Drive Output
- Relay Rating: 10A @ 250V AC / 24V DC
- SSR Output: 12V DC, 50mA
- Supply Voltage: 90–270V AC/DC
- Sampling Time: 250 ms
- Accuracy: ±0.25% F.S. (J, K, T inputs)
- Operating Temperature: 0°C to 50°C
- Storage Temperature: -20°C to 75°C
- Humidity: Up to 95% RH (non-condensing)
- Mounting Type: Panel Mount
- Panel Size: 96 × 96 mm
- Protection Rating: IP65 Front Panel
- Application: Ovens, furnaces, packaging machines, plastic machinery, HVAC systems, industrial process control

