Reference

This Reference section is to assist Watlow customers in understanding the principles of electric thermal systems and components as they apply to various heating tasks. The purpose of this information is to give you theory, general calculations and engineering data along with examples for solving heating problems.

Equations	Glossary
3-Phase Wye and Delta Wiring Diagrams and Equations Ohm's Law Power Calcuations (PDF) Conversion Formulas	Definitions of Commonly Used Terms Used in Heating, Sensing and Controlling (PDF)
Guides & Tutorials	Reference Data
Controllers Quick Reference Guide Power Controller Comparison Guides Temperature Sensor Comparison Guides Corrosion Guide (PDF) Maximizing Heater Performance General Method for Determining Heater Requirements Evaluating Sensor Placement In A Thermal System Specifying Thermal Components Agency Standards for Temperature & Power Controllers Supplier Selection Criteria	Amperage Conversions Heat Loss Factors & Graphs Quick Estimates of Wattage Requirements (PDF) Properties of Gases & Air (PDF) Properties of Liquids (PDF) Properties of Metals (PDF) Properties of Metals in Liquid State (PDF) Properties of Non-Metallic Solids (PDF) Thermocouple Types Thermocouple Wire Specifications & Tolerances Thermocouple Standards & Color Codes (PDF) Recommended Upper Temperature Limits For Thermoelements RTD Tolerances, Classes & Comparisons
Literature	Product Selection Guides
Catalogs & Brochures *i-Catalog* Specification Sheets Product Technical Info	Heater Selection Guide Sensor Selection Guide Controller Selection Guide

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Watlow Electric Manufacturing Company 12001 Lackland Road, St. Louis, Missouri, USA 63146
phone: 1-800-WATLOW2 to contact your local sales agent · 1-800-4WATLOW for manufacturing support