Stork Solutions

PUR-94 D PID Controller with Dual LED Display

Introducing PUR-94D: The Ultimate Precision Controller

Experience the power of PUR-94D, a versatile two-step controller with advanced PID control and dual heating/cooling loops. Its intuitive ON-OFF or hysteresis control, coupled with auto-tuning and Fuzzy-Logic, ensures exceptional performance. Monitor real-time measurements on the dual-row display, presenting values and programmed settings. Choose from REL, OC (SSR), or analogue output options based on your needs, including active/passive current or voltage output. The universal input supports various types like 0/4-20 mA, 0-10V, Pt 100/500/1000, or TC (K, S, J, T, N, R, B, E). Benefit from compensated cold junctions, linearised RTD/TC inputs, and customisable characteristic curves. Seamlessly integrate with RS-485 for data transmission and configuration via the local keyboard or free S-Config software. Elevate your precision control with PUR-94D today.

Product Highlights

The PUR94D is a versatile and efficient PID controller that combines the simplicity of a two-step controller with the advanced features of a PID controller. It features two control loops for heating and cooling, supported by an auto-tuning function and Fuzzy-Logic algorithm. The controller boasts a dual-row display, with the first row showing the measured values and the second row displaying programmed values. It offers multiple output options, including REL, OC (SSR), or analogue output, based on customer preferences. These outputs can be utilised in the control process, with active current output, passive isolated current output, or active voltage output available. The PUR94D controller comes with a universal input, enabling connection with various types of sensors such as mA, V, mV, Pt, or TC inputs. It automatically compensates for the cold junction of thermocouple sensors and provides fully linearised characteristics for RTD and TC inputs. The wide range of characteristic curves, including user-defined and volume characteristics, makes it suitable for diverse process control systems. Configuration can be done through the local keyboard or the free S-Config software using the RS-485 communication port.


  • 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 94 D

Additional information


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