SERIES F4 Open Collector Output Replacement Guide

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Products

Products

Products Configure a Product Part Lookup Help Me Choose Product Documentation

Products

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Electric Heaters

Cartridge/Insertion Heaters Circulation Heaters Immersion Heaters Air Heaters Flexible Heaters Tubular Heaters Gas Delivery and Exhaust Heaters High-Temperature Heaters Specialty Heaters View All

Temperature & Process Control

Multi Loop Controllers Single Loop Controllers Indicators and Alarms Limits and Scanners Operator Interfaces

Power Control

Power Controllers Power Switches

Data Management

Data Recorders

Panels & Systems

WATCONNECT® Control Panels POWERSAFE™ Thermal System

Sensors

Thermocouples Resistance Temperature Detectors (RTDs) Sensor Accessories

Not Sure? Try Our Digital Product Assistant

Take the complexity out of product selection with our innovative Digital Product Assistant. Answer a few application questions and our interactive tool will recommend a product from our catalog.
Launch Assistant

Configure a Product

Watlow SELECT® Visual Designer™

Quickly configure a product to meet the unique requirements of your application. Instantly access lead times, dimensional drawings, and more - at your own pace. No login required.
Get Started

Prefer to talk to a human? Find a Distributor or Sales Office

Part Lookup

Know Your Part Number?

Enter your part number exactly as marked.

#

Tip
Many parts have lead times, dimensional, drawings, and more available on-demand. Click "Request a Quote" on the search result to access.

Help Me Choose

Not Sure? Try Our Digital Product Assistant

Take the complexity out of product selection with our innovative Digital Product Assistant. Answer a few application questions and our interactive tool will recommend a product from our catalog.
Launch Assistant

Still need help? Locate a Rep Contact Us

Product Documentation

Watlow Catalogs Specification Sheets User Manuals Software and Demos Brochures

CAD Drawings Mobile Applications Watlow Patents Certifications & Approvals

Try Our Interactive Catalogs

Click Here

Products

View All

Electric Heaters

Cartridge/Insertion Heaters Circulation Heaters Immersion Heaters Air Heaters Flexible Heaters Tubular Heaters Gas Delivery and Exhaust Heaters High-Temperature Heaters Specialty Heaters View All

Temperature & Process Control

Multi Loop Controllers Single Loop Controllers Indicators and Alarms Limits and Scanners Operator Interfaces

Power Control

Power Controllers Power Switches

Data Management

Data Recorders

Panels & Systems

WATCONNECT® Control Panels POWERSAFE™ Thermal System

Sensors

Thermocouples Resistance Temperature Detectors (RTDs) Sensor Accessories

Not Sure? Try Our Digital Product Assistant

Take the complexity out of product selection with our innovative Digital Product Assistant. Answer a few application questions and our interactive tool will recommend a product from our catalog.
Launch Assistant

Configure a Product

Watlow SELECT® Visual Designer™

Quickly configure a product to meet the unique requirements of your application. Instantly access lead times, dimensional drawings, and more - at your own pace. No login required.
Get Started

Prefer to talk to a human? Find a Distributor or Sales Office

Part Lookup

Know Your Part Number?

Enter your part number exactly as marked.

#

Tip
Many parts have lead times, dimensional, drawings, and more available on-demand. Click "Request a Quote" on the search result to access.

Help Me Choose

Not Sure? Try Our Digital Product Assistant

Take the complexity out of product selection with our innovative Digital Product Assistant. Answer a few application questions and our interactive tool will recommend a product from our catalog.
Launch Assistant

Still need help? Locate a Rep Contact Us

Product Documentation

Watlow Catalogs Specification Sheets User Manuals Software and Demos Brochures

CAD Drawings Mobile Applications Watlow Patents Certifications & Approvals

Try Our Interactive Catalogs

Click Here
What We Do

What We Do

The Thermal Loop Industry Solutions Electrification Industry 4.0

The Thermal Loop

Learn More

The Thermal Loop

For Watlow, the underlying concept behind everything we do is that of the thermal loop. Every product we offer, and every project we work on, is ultimately about the creation and control of a thermal loop in an application.
Learn More

Industries

Heat Treatment Energy and Environmental Technologies Life Sciences

Clinical Equipment Semiconductor Processing Foodservice Equipment

Electrification

Electrification

Over 100 years ago, Watlow began designing and manufacturing electric heating elements to replace steam in the shoe industry. We've been electrifying equipment and processes ever since. Wherever thermal is critical, no one is better equipped to help you reach your energy transition goals. Learn why leading companies partner with us.
Learn More

Industry 4.0

The Thermal Loop & Industry 4.0

Industry 4.0 technology enables the capture and processing of data in real time, both where its generated and where it is needed, to implement effective improvements to industrial processes. Capturing data, though, is not enough. The advantage Watlow® brings to an Industry 4.0 project are its thermal experts, who understand both the important role thermal loop systems play in key applications and industry 4.0 implementations.
Learn More

The Thermal Loop

Learn More

The Thermal Loop

For Watlow, the underlying concept behind everything we do is that of the thermal loop. Every product we offer, and every project we work on, is ultimately about the creation and control of a thermal loop in an application.
Learn More

Industries

Heat Treatment Energy and Environmental Technologies Life Sciences

Clinical Equipment Semiconductor Processing Foodservice Equipment

Electrification

Electrification

Over 100 years ago, Watlow began designing and manufacturing electric heating elements to replace steam in the shoe industry. We've been electrifying equipment and processes ever since. Wherever thermal is critical, no one is better equipped to help you reach your energy transition goals. Learn why leading companies partner with us.
Learn More

Industry 4.0

The Thermal Loop & Industry 4.0

Industry 4.0 technology enables the capture and processing of data in real time, both where its generated and where it is needed, to implement effective improvements to industrial processes. Capturing data, though, is not enough. The advantage Watlow® brings to an Industry 4.0 project are its thermal experts, who understand both the important role thermal loop systems play in key applications and industry 4.0 implementations.
Learn More
Who We Are

Who We Are

About Us Core Values Sustainability News and Events

About Us

We solve the world's toughest and most important thermal problems.

About Us Company History Watlow Worldwide

Core Values

The Watlow Way

At Watlow, our lean journey, as well as our core organizational beliefs are aligned with the Watlow Way, a set of core principles, behaviors and values which guides our company and is woven through every decision we make.
Learn More

Sustainability

Some of our best work is performed in areas intended to protect and preserve our environment

We believe protecting the environment is everyone's responsibility and both our products and our own lean manufacturing processes are designed to address these challenges.
Learn More

News and Events

Find the latest news, press releases, announcements, and events

News

Watlow® joins forces with AEQT (Asociación Empresarial Química de Tarragona) as a New Business Partner Watlow’s New Large and Extra Large WATCONNECT® Control Panels Maximize Process Uptime with a Small Footprint Watlow® Launches ASSURANT® HT, a High-Temperature Solution for Semiconductor Processing Watlow’s New Large and Extra Large WATCONNECT® Control Panels Maximize Process Uptime with a Small Footprint Watlow’s New PM PLUS® 1/8 DIN PID Controller Watlow® Obtains KGS Certification on Flange and Circulation Heaters Watlow® Completes Acquisition of Eurotherm®

View All News

Events

Follow us on LinkedIn for event updates and the latest news

About Us

About Us Company History Watlow Worldwide

Core Values

The Watlow Way

At Watlow, our lean journey, as well as our core organizational beliefs are aligned with the Watlow Way, a set of core principles, behaviors and values which guides our company and is woven through every decision we make.
Learn More

Sustainability

Some of our best work is performed in areas intended to protect and preserve our environment

We believe protecting the environment is everyone's responsibility and both our products and our own lean manufacturing processes are designed to address these challenges.
Learn More

News and Events

News

Watlow® joins forces with AEQT (Asociación Empresarial Química de Tarragona) as a New Business Partner Watlow’s New Large and Extra Large WATCONNECT® Control Panels Maximize Process Uptime with a Small Footprint Watlow® Launches ASSURANT® HT, a High-Temperature Solution for Semiconductor Processing Watlow’s New Large and Extra Large WATCONNECT® Control Panels Maximize Process Uptime with a Small Footprint Watlow’s New PM PLUS® 1/8 DIN PID Controller Watlow® Obtains KGS Certification on Flange and Circulation Heaters Watlow® Completes Acquisition of Eurotherm®

View All News

Events

Follow us on LinkedIn for event updates and the latest news
Resources

Resources

Product Documentation Tools and Calculators Customer Service Knowledge and Insights

Product Documents

Watlow Catalogs Specification Sheets User Manuals Software and Demos Brochures

CAD Drawings Mobile Applications Watlow Patents Certifications & Approvals

Tools and Calculators

Wattage Calculator Ohm's Law Calculator 3-Phase Delta / Wye Calculator Glossary Equations Reference Data

Customer Service Documents

Invoice Payment Options Supplier Requirements Environmental Polices and Statements Copyright and Trademark Information Certifications & Approvals Policies Return Materials Authorization (RMA)

Knowledge and Insights

White Papers
Browse White Papers

Tech Tips
Browse Articles

Product Documents

Watlow Catalogs Specification Sheets User Manuals Software and Demos Brochures

CAD Drawings Mobile Applications Watlow Patents Certifications & Approvals

Tools and Calculators

Wattage Calculator Ohm's Law Calculator 3-Phase Delta / Wye Calculator Glossary Equations Reference Data

Customer Service Documents

Invoice Payment Options Supplier Requirements Environmental Polices and Statements Copyright and Trademark Information Certifications & Approvals Policies Return Materials Authorization (RMA)

Knowledge and Insights

White Papers
Browse White Papers

Tech Tips
Browse Articles
Careers

Careers

Careers

Career Opportunities

Are you looking for an opportunity to make a great living and be part of a thriving cross functional community? Select an option below to view opportunities in your region.

View Openings

United States Europe Asia Mexico

Student Programs
At Watlow®, we recognize the importance of learning, experimenting, and building your career. Our student programs are a great way for you to gain hands-on experience and on-the-job learning from the start. Learn More

Career Opportunities

View Openings

United States Europe Asia Mexico

Student Programs
At Watlow®, we recognize the importance of learning, experimenting, and building your career. Our student programs are a great way for you to gain hands-on experience and on-the-job learning from the start. Learn More

Products

Products

Electric Heaters

Temperature & Process Control

Power Control

Data Management

Panels & Systems

Sensors

Not Sure? Try Our Digital Product Assistant

Configure a Product

Watlow SELECT® Visual Designer™

Part Lookup

Know Your Part Number?

Help Me Choose

Not Sure? Try Our Digital Product Assistant

Still need help? Locate a Rep Contact Us

Product Documentation

Try Our Interactive Catalogs

Products

Products

Electric Heaters

Temperature & Process Control

Power Control

Data Management

Panels & Systems

Sensors

Not Sure? Try Our Digital Product Assistant

Configure a Product

Configure a Product

Watlow SELECT® Visual Designer™

Part Lookup

Part Lookup

Know Your Part Number?

Help Me Choose

Help Me Choose

Not Sure? Try Our Digital Product Assistant

Still need help? Locate a Rep Contact Us

Product Documentation

Product Documentation

Try Our Interactive Catalogs

What We Do

The Thermal Loop

The Thermal Loop

Industries

Electrification

Electrification

Industry 4.0

The Thermal Loop & Industry 4.0

The Thermal Loop

The Thermal Loop

The Thermal Loop

Industry Solutions

Industries

Electrification

Electrification

Electrification

Industry 4.0

Industry 4.0

The Thermal Loop & Industry 4.0

Who We Are

About Us

Core Values

The Watlow Way

Sustainability

Some of our best work is performed in areas intended to protect and preserve our environment

News and Events

News

Events

Follow us on LinkedIn for event updates and the latest news

About Us

About Us

Core Values

Core Values

The Watlow Way

Sustainability

Sustainability

Some of our best work is performed in areas intended to protect and preserve our environment

News and Events

News and Events

News