Temperature controllers (PID) with thermocouple (K/J/T/N) or RTD (Pt100/Pt1000) provide closed-loop process temperature control — plastic machines, ovens, heat treatment, injection molding, battery drying. Omron E5xx, Eurotherm (UK, process), West Control, Watlow (US) and Gefran (IT) lead.
Temperature Controller
Temperature Controller
Temperature controllers (PID) with thermocouple or RTD provide closed-loop process temperature control — plastics, ov...
Temperature controllers (PID) with thermocouple or RTD provide closed-loop process temperature control — plastics, ovens, heat treatment. Omron E5xx, Eurotherm, West Control, Watlow and Gefran lead.
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FAQ
Q K thermocouple or Pt100 RTD?
A
K: -200 to +1300°C, wide range, cheap, fast (0.5-1 s), accuracy ± 2°C. Pt100: -200 to +850°C, ± 0.3°C, more stable, costlier. High temperature (> 850°C) → K; precision < 850°C → Pt100.
Q PID auto-tuning?
A
Modern controllers (Omron E5CD, Eurotherm 3500) support 1-key auto-tune — step response computes P/I/D. Manual via Ziegler-Nichols: set P, add I against steady-state error, finish with D against overshoot.
Q Controller output type?
A
Relay (mechanical, slow, finite life); SSR (solid-state, fast, no wear); 4-20 mA (drives proportional valve); PWM (drives heater via DC-SSR fast on/off).