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PUR-94 Advanced PID controller

Meet PUR-94: Advanced Dual-Loop PID Controller for Efficient Process Management. The PUR-94 PID controller excels in both heating and cooling with its dual control loops. Featuring auto-tuning and Fuzzy-Logic for peak efficiency, it offers customisable outputs (REL/OC and analogue) to suit diverse needs. Compatible with a broad range of input signals including 0/4-20 mA, 0-10V, Pt 100/500/1000, and various TCs, it integrates easily into different systems. Its LED display and RS-485 port enhance usability and connectivity. Configurable via keyboard or S-Config software, PUR-94 brings precision to process control.

PUR 94 PID Controller Product Parameters

  • Output Signal: Current 0-20 mA or 4-20 mA, Voltage 0-10V or 2-10V.
  • Accuracy: 0.1% @25°C ± one digit for various inputs, 0.2%-0.5% for others.
  • Electrical Connections: Power supply range 19V ÷ 50V DC, 16V ÷ 35V AC, 85 ÷ 260V AC/DC.
  • Process Connections: Input resistance < 65 Ω for current, > 100 kΩ for voltage.
  • Media Compatibility: Operating temp. 0°C to +50°C, storage temp. -10°C to +70°C.
  • Special Features: LED display, binary and analogue outputs, RS-485 communication, IP 65/20 protection.

Product Highlights

The PUR94 is an advanced PID controller with dual control loops for heating and cooling. It boasts an auto-tuning feature and utilises a Fuzzy-Logic algorithm for optimal performance. Depending on customer preference, it offers built-in REL, OC (SSR), or analogue output, including active current, passive isolated current, or active voltage output. The controller features a universal input that supports 0/4-20 mA, 0-10V, 0-150 mV, Pt 100/500/1000, or TC (K, S, J, T, N, R, B, E) inputs. It automatically compensates for the cold junction of thermocouple sensors and provides linearised characteristics for RTD and TC inputs. With a range of characteristic curves (linear, square root, quadratic, user-defined, and volume characteristic for cylindrical tanks), it is versatile for various process control systems. The controller includes a 24V DC / 100 mA output to power measuring transducers and facilitates data transmission through its RS-485 port for production process monitoring. Configuration is possible using the free S-Config software via the RS-485 communication port.


  • PID, Auto-tuning, Fuzzy Logic
  • Controller with a large, 20 mm high, LED display
  • Universal input: 0/4-20 mA, 0-10V, 0-150 mV, RTD or TC
  • REL / OC (SSR) outputs
  • Analogue output: active or passive, power supply output: 24V DC
  • RS-485 / Modbus RTU in standard
  • Signal peak value detection
  • Free configuration software S-Config

To download the latest datasheet click here: PUR 94

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