A Guide to Safe Electronic Weighing in Hazardous Locations

Safety is paramount when operating electronic scales in hazardous locations. In this guide, the industrial equipment experts at Arlyn Scales describe:


  • The Different Classes of Hazardous Electrical Locations
  • Equipment Markings
  • Certification Requirements


This maximizes the safety of your workforce and the integrity of your operations. Continue reading to learn how to select reliable sources of precision weighing equipment for your operations.

3 Classes of Hazardous Electrical Equipment Locations

  • Class I: Gas & Vapor
  • Class II: Dust
  • Class III: Fibers and Flyings

Class I: Gas & Vapor

Specific precautions must be taken in hazardous locations where flammable gasses and vapors are present, such as refineries or chemical plants. Class I locations are divided into two divisions: Division 1 (C1D1) and Division 2 (C1D2). 


Division 1 areas are where flammable substances are continuously present or likely to be present during normal operations. Alternatively, Division 2 areas have flammable substances present but not in sufficient quantities to require continuous precautions.

Class II: Dust

Certain environments generate combustible dust, such as flour mills and woodworking facilities,  and this can pose a significant safety risk. Class II locations are also divided into Division 1 (C2D1) and Division 2 (C2D2). 


As with Class I hazards, C2D1 areas are those in which combustible dust is continuously present, or likely to be so, during regular operations. Division 2 areas are any in which combustible dust is insufficiently present to demand continuous precautions.

Class III: Fibers and Flyings

Class III locations involve hazardous materials in the form of fibers or flyings, such as textile mills or woodworking operations. These materials can ignite easily and spread rapidly. Class III hazardous locations do not have divisions like Class I and Class II.

3 Markings for All Equipment Used in Hazardous Locations

To ensure the suitability of electrical equipment for use in hazardous environments, various markings must be considered, including:


  1. Class: Your equipment must be marked with the appropriate class to indicate its fitness for specific hazardous locations (see above).


  1. Group: Your machinery must be marked with a group classification to further specify the type of hazardous material it can handle safely.


  1. Operating Temperature Range: Your equipment must be marked with the temperatures at which the equipment can operate reliably without causing ignition.

Is Your Electrical Equipment Certified for Hazardous Environments?

When selecting electronic scales for hazardous locations, it’s crucial to ensure they’re certified and meet the necessary safety standards. At Arlyn Scales, we offer a range of certified scales designed for different hazardous environments.

C1D1 and C1D2 Explosion-Proof Scales 

These scales are designed to withstand the most hazardous conditions. They’re suitable for use in areas where flammable substances are continuously present or likely to be present during normal operations.

Intrinsically Safe and Fire-Rated Scales

Intrinsically safe scales are engineered to prevent sparks and explosions, making them suitable for areas with potentially explosive atmospheres. Fire-rated scales are designed to withstand high temperatures and provide an extra layer of protection.

Chlorine-Ton and Corrosion-Resistant Scales

These scales are ideal for environments where chlorine or corrosive materials are handled. They’re designed to handle large loads while ensuring safety and durability.

Find Safe Electronic Scales for Your Workplace at Arlyn Scales

Operating electronic scales in hazardous locations requires a comprehensive understanding of the classes of hazardous locations, equipment markings, and certification requirements. By following this guide, you’re empowered to make informed decisions for maximizing safety in your commercial operations


At Arlyn Scales, we provide a wide range of precision industrial metrology equipment, including scales specifically designed for hazardous environments. Our certified scales offer reliability, while optimizing accuracy — and most importantly — safety. 


By choosing the right scale for your specific hazardous location, you’ll enhance safety measures and ensure compliance with regulations. To find the ideal digital weighing solution for your hazardous workplace environment, reach out to our team today.