Understanding Hazardous Location Classifications & Pressure Transmitters | Complete Guide

Unlock how to safely measure pressure and level in hazardous locations while complying with North American Class/Division/Group standards in this concise NOSHOK overview of hazardous location transmitters.

In this video, NOSHOK explains what defines a hazardous location, using real-world examples to illustrate the fire/combustion triangle of fuel, oxygen, and ignition sources. You will learn how the Class, Division, and Group system is used in North America to categorize flammable gases, combustible dusts, and ignitable fibers, and why proper area classification matters for equipment selection and installation.

Who This Video Is For
This video is valuable for engineers, instrument technicians, safety managers, and specifiers working in oil and gas, chemical processing, mining, marine, and other hazardous process industries. Viewers gain practical insight into selecting hazardous location transmitters that align with area classification, safety goals, and regulatory compliance.

What You Will Learn
How hazardous locations are classified into Class I (flammable gases/vapors), Class II (combustible dusts), and Class III (ignitable fibers), along with typical application examples like refineries, grain elevators, and gas storage areas.

The difference between Division 1 and Division 2, and how groups (A–G) further define specific gas, vapor, or dust hazards based on combustibility. How explosionproof, non-incendive, and intrinsically safe protection strategies reduce ignition risk and support compliance with FM, CSA, ANSI/ISA, NACE, and ISO requirements.

NOSHOK Hazardous Location Pressure Transmitter Solutions
621/622 explosion proof pressure transmitters designed with rugged housings to contain and dissipate explosion energy in harsh environments such as wellhead pressure monitoring, chemical processing, offshore oil rigs, and mining.

623/624 non-incendive pressure transmitters engineered as energy-limited devices for hazardous environments like oil and gas, refineries, and wastewater where flammable gases or vapors may be present but not continuous.

625/626 intrinsically safe pressure transmitters with low pressure ranges for vapor recovery, multiple electrical connection options, and suitability for storage tanks, boreholes, and flammable liquid zones.

627 intrinsically safe submersible liquid level transmitters ideal for irrigation tank monitoring, wellhead measurement, and marine fuel storage tanks.

Safety Certifications Covered:

• FM (Factory Mutual) Approved
• CSA (Canadian Standards Association) Approved
• ANSI (American National Institute) Approved Single Seal
• NACE (National Association of Corrosion Engineers) Compliance