Watlow’s PM PLUS™

The enhanced EZ-ZONE® PM, is now more intuitive and features an enhanced interface for easier programming and readability with a SMOOTH-TOUCH™ keypad creating an industry leading user experience. The PM PLUS is backwards compatible with legacy EZ-ZONE PM controllers but offers many user upgrades including an intuitive menu flow allowing the controller to be easily configured.

It also continues to offer the industry leading Bluetooth® connectivity with the EZ-LINK™ mobile app for remote access capability and full descriptions of parameters and error codes. The PM PLUS improves the user experience by reducing the complexity at the front of the control while eliminating the dependency of cables when configuring the product.

Features and Benefits

  • Intuitive menu flow
  • SMOOTH TOUCH keypad
  • Bluetooth® compatiblewith EZ-LINK™ mobile app
  • Integrated PID and limit controller
  • High amperage power control output
  • Remote set point operation
  • Profile capability
  • Retransmit output
  • Factory Mutual (FM) approved over/under limit with auxiliary outputs
  • Memory for saving and restoring parameter settings



  • User-selectable heat/cool, on-off, P, PI, PD, PID or alarm action
  • Auto-tune with TRU-TUNE+ adaptive control algorithm
  • Control sampling rates: input = 10Hz, outputs = 10Hz

Profile Ramp/

  • 4 profiles, 40 total steps
  • Accuracy (typical): ±30 PPM at 77°F (25°C) +30/-100 PPM at -4 to 149°F (-20 to 65°C)

Dimensional Drawing

Typical Block Diagram

Compatible Accessories