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What's in a Hazard Rating - NIR-Online.pdf

Hazard
Type
Frequency of
Occurrence
Class, Division
System
GAS
Continuous
Class 1, Division 1
Intermittent, Periodic
Abnormal Conditions Class 1, Division 2
DUST
Continuous
Class 2, Division 1
Intermittent, Periodic
Abnormal Conditions Class 2, Division 2
The importance of hazard classifications for
NIR process sensors
WHAT'S IN A
HAZARD RATING?
What are Class/Division Hazard
Ratings?
The Class/Division method is an important hazard
rating standard used in North America. It dictates
what electrical materials can or cannot be used in a
workplace area based on the presence and
duration or frequency of flammable gas or dust
hazards. The longer the material is present, the
greater the hazard.
The table below provides definitions for both the
Class/Division and Zone System scales.
Why Does it Matter?
Installing equipment with insufficient Class/Division
rating for a particular working environment exposes
an area to an unacceptable level of risk for an
explosion.
The Class/Division method is the dominant method
used North America, with requirements set by the
National Electrical Code (NEC) and Canadian
Electrical Code (CEC).
The IP69-rated BUCHI NIR-Online X-
Sential process sensor is the only online
NIR sensor on the market rated for Class
2, Division 2 areas, ensuring safety for
workplace environments with flammable
dust such as grain dust, coal dust, milk
powder, metal dust, and sugar dust.
Learn more about BUCHI NIR-Online at
www.buchi.com.
Which NIR is Best?

What's in a Hazard Rating - NIR-Online.pdf




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