Looking to future-proof your thermal system or improve temperature control efficiency? Whether you operate in manufacturing, food processing, packaging, or research, now is the perfect time to retrofit your legacy systems with Watlow’s next-generation PID temperature controllers—the PM PLUS™ and PM LEGACY™. These advanced, digital temperature controllers are designed to deliver reliable performance, easier setup, and greater process control.
Why Retrofit Your Temperature Controller?
Watlow’s PM PLUS and PM LEGACY models are built on the strengths of the proven EZ-ZONE® PM line but offer major advancements in usability and technology. Whether you're located in California, the Midwest, or any industrial hub, upgrading to a modern temperature controller is a simple way to boost efficiency and compliance in your facility.
Key Advantages:
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Fully backward compatible for seamless retrofitting
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Intuitive user interface with full-text multilingual display
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Durable SMOOTH-TOUCH™ keypad ideal for harsh environments
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Bluetooth® connectivity for wireless setup and diagnostics
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Simplified configuration with EZ-LINK™ mobile app
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Enhanced performance in demanding thermal processes
PM PLUS™ and PM LEGACY™: What’s New in These Digital Temperature Controllers?
Watlow’s latest digital temperature controllers feature:
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A rugged, contamination-resistant enclosure
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Multilingual, full-color display for easy visibility across global operations
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Streamlined menu navigation with “list of lists” structure
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Support for both temperature and process variables like pressure and flow
These innovations help teams reduce training time, avoid configuration errors, and support evolving process demands—whether you’re in high-tech labs or temperature-critical manufacturing.
PM LEGACY™: Simplified PID Temperature Controller for Repetitive Applications
Designed as a no-frills PID temperature controller, PM LEGACY is ideal for basic applications such as:
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Packaging line heater control
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Foodservice equipment
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Simple industrial heating loops
Features include:
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Single-loop operation with up to two outputs
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Universal input and TRU-TUNE+® adaptive control
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Bluetooth® capability for remote access in compact DIN sizes
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Built-in safety protocols to prevent unauthorized access
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Easy drop-in replacement for legacy EZ-ZONE PM models
Facilities in local manufacturing sectors looking for cost-effective temperature control will find the PM LEGACY an ideal fit.
PM PLUS™: Multi-Function Digital Temperature Controller for Advanced Systems
For more complex process applications, the PM PLUS offers a powerful upgrade. It combines temperature, flow, and pressure control with advanced output and configuration options.
Available features:
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Panel-mount design in 1/16 DIN size
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Choice of standard or integrated PID models
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Up to four outputs and input isolation options
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Wireless configuration via EZ-LINK™ and Bluetooth®
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Sleek, button-free front panel for cleanroom or washdown environments
Whether you’re operating in pharmaceutical labs, OEM production, or regional electronics manufacturing, PM PLUS provides a modernized control solution that grows with your process.
Why Retrofitting Makes Sense Now
If your facility still uses EZ-ZONE PM units, upgrading to PM PLUS or PM LEGACY can be done in minutes with minimal downtime. These controllers are engineered for backward compatibility, eliminating the need for rewiring or structural changes.
Retrofit Benefits:
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Immediate performance improvements
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Better system efficiency and controller access
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Simplified mobile monitoring for remote teams
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Easier system validation and audit compliance
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Reduced training needs for operators and technicians
This is especially beneficial for industries in high-compliance regions or operations looking to improve their temperature control strategy without full system overhauls.
Applications Across Industries and Regions
Watlow’s PID temperature controllers are trusted across North America and globally for use in:
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Semiconductor processing
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Environmental test chambers
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Industrial ovens and kilns
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Biotech and laboratory research
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Food and beverage processing
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Medical device manufacturing
If you're responsible for process reliability, regulatory compliance, or system performance in your region, the PM PLUS and PM LEGACY will deliver measurable benefits.
Get Started: Retrofit Your Digital Temperature Controller Today
Whether you’re in Texas, Ontario, or Southern California, retrofitting your current temperature controller with a PM PLUS or PM LEGACY model gives your operation an edge in efficiency, accuracy, and ease of use.
For more information or help selecting the right PID temperature controller for your application, visit www.watlow.com or contact your local Watlow representative.