Stork Solutions
Close this search box.

PUR-99 Two-step Process Controller with Fuzzy logic and Auto-tune

Experience precise temperature control with PUR-99, an advanced PID controller boasting Auto-Tuning and Fuzzy-Logic Algorithm. Combining the simplicity of a two-step controller with the sophistication of PID, PUR-99 ensures optimal performance for heating and cooling applications through its dual control loops. The user-friendly interface displays both measured and programmed values, while the controller offers flexibility with built-in REL, OC (SSR), or analogue output options and supports various input signals like 0/4-20 mA, 0-10V, 0-150 mV, Pt 100/500/1000, or TC (K, S, J, T, N, R, B, E). Accurate measurements are guaranteed with automatic cold junction compensation and fully linearised characteristics for RTD and TC inputs. Moreover, the PUR-99 controller adapts seamlessly to diverse process control systems, offering a wide range of characteristic curves and an RS-485 port for efficient data transmission. Configuration is effortless through the local keyboard or user-friendly S-Config software via the RS-485 communication port. Unlock precise control with PUR-99, the ultimate solution for temperature control needs.

PUR 99 Process Controller Product Parameters

  • Output Signal: Dual colour LED display; supports current, voltage, thermoresistance, and thermocouple inputs.
  • Accuracy: 0.1% @25°C for most inputs; varies for different thermocouple types.
  • Electrical Connections: Power supply options: 19V-50V DC, 16V-35V AC, 85-260V AC/DC.
  • Process Connections: Multiple input resistance options for different signal types.
  • Special Features: Binary and analogue output options, RS-485 communication interface, operating temperature range of 0°C to +50°C (standard), protection class IP 65 (front) and IP 20 (case), panel mounting design. 

Product Highlights

The PUR99 Process Controller is a versatile device that combines a two-step controller with an advanced PID controller. It features two control loops for heating and cooling, supported by auto-tuning and Fuzzy-Logic algorithm. The controller offers a user-friendly interface with two rows of display, showing real-time measurements and programmed values. It provides flexible output options, including REL, OC (SSR), or analogue output, and supports various input types such as 0/4-20 mA, 0-10V, 0-150 mV, Pt 100/500/1000, or TC (K, S, J, T, N, R, B, E). With linearised characteristics for RTD and TC inputs and a wide range of characteristic curves, the controller can be used in different process control systems. It also includes a 24V DC / 100 mA output for powering measuring transducers and an RS-485 port for data transmission. Configuration can be done through the local keyboard or S-Config software via the RS-485 communication port. The PUR99 Process Controller offers reliable and precise control for various applications.


  • ON-OFF hysteresis, Fuzzy PID, Auto-tuning
  • Dual LED display:
    • PV – measured value
    • SV – setpoint value
  • Universal input: 0/4-20 mA, 0-10V, 0-150 mV, RTD or TC
  • REL 5A / 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 99

Send through your product enquiry

Thank you for visiting Stork Solutions.


Please fill in the form and send through your enquiry. If you are interested in multiple products then please add the details into the message section.


We look forward to receiving your enquiry.


Thank you

Stork Solutions