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. 


Red Lion’s Dual Loop Controllers (DLC) offer dual independent PID control loops to provide multi-zone process control. The DLC accepts signals from both temperature and process inputs and supports square root extraction flow sensor applications, dual analog output control and RS-485 communications. Learn more.
  Model PXU PAX2C DLC Modular Controller Graphite® Platform FlexEdge® Platform
  Size 1/16 DIN
1/8 DIN
1/4 DIN
1/8 DIN DIN Rail 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.