PID Controllers

From single to multi-point control, Red Lion has the right PID controller for any application. Red Lion provides a wide range of proportional-integral-derivative (PID) controllers that are rugged, reliable and easy to deploy. Our PID controllers offer industry-leading features and reliable performance designed for the most demanding applications.

Panel Mount


The Red Lion PAX®2C PID controllers offer universal inputs, including thermocouples, RTDs, process signals, DC current/voltage and resistance. Available in 1/8 DIN size models, PAX2C controllers work with field-installable option cards to seamlessly support changing applications and upgrade requirements. Learn more.



Red Lion’s PXU enables tighter, more reliable control over a wide range of processes from a single PID controller. Available in 1/16, 1/8 and 1/4 DIN size models, the PXU accepts process, thermocouple and RTD signals and presents values on one of the industry’s largest dual displays. Available options include DC analog control, RS-485 communication and user inputs. Learn more.

DIN Rail Mount

Graphite®, FlexEdge® and Modular Controller

The FlexEdge and Graphite platforms and Modular Controller series allow users to seamlessly integrate multi-zone PID control, data acquisition and I/O into PC, DCS or PLC control systems.  Stack hot swappable modules together for a space saving solution. Available features include protocol conversion, virtual HMI, advanced web server, SQL query and cloud connectors. 


  Model PXU PAX2C Modular Controller Graphite® Platform FlexEdge® Platform
  Size 1/16 DIN
1/8 DIN
1/4 DIN
1/8 DIN DIN Rail Various Panel
and DIN Rail
DIN Rail
  Display Capability   Virtual
  Universal Signal Input
  Single Loop
  Dual Loop  
  Multiple Loop  
  Heater Current Monitor
  Remote Setpoint      
  Ramp/Soak Capability

For possible replacements of discontinued models, please see our Product Replacement Guide.